bluuebunny/crossref_metadata_2025_split huggingface dataset:
Polymorphic transformation and multiple melting in poly(butene‐1)
Authors: Gohil R. M. , Patel R. D. 
Published: April 2003

AbstractPolymorphic transformations and multiple melting phenomena of poly(butene‐1) have been studied by Differential Scanning Calorimetry (DSC). Conversion of form‐III to form‐II follows a crystal‐crystal transformation mechanism and shows a similar feature as observed by other techniques. The effect of various parameters on the nature of DSC traces has been investigated. Equilibrium melting temperatures for different modifications, form‐I, form‐II, and form‐III are found to be 142, 130, and 110°C respectively.
Studies on photodegradation of poly(vinyl chloride) (part 1)
Authors: Mori Fumio , Koyama Masayasu , Oki Yoshio 
Published: April 2003

AbstractFilms prepared from emulsion polymerized poly(vinyl chloride) were subjected at 0°C to accelerated photodegradation in air using a weatherometer. Photooxidation and scission of the main chain took place but dehydrochlorination or formation of polyenes was not observed. The absorption of the carbonyl group indicating oxidation was found at 1725cm−1 in the infrared absorption spectrum. Only when tetrahydrofuran, which had been used for the preparation of films, was left in the films, an absorption was also found at 1770cm−1. Oxidation occurred at the position of the methylene carbon and the cut end of the main chain. As a result of the X‐ray photoelectronic spectrum (ESCA) analysis, it was found that the carbonyl concentration was higher in the surface layer of the sample than in the interior thereof.
Stability of polyamic acids and polyimides
Authors: Varma I. K. , Goel R. N. , Varma D. S. 
Published: April 2003

AbstractThe polyamic acids from pyromellitic dianhydride, benzidine (B) and hydrazine (H) were prepared and characterized by intrinsic viscosity measurements in dimethylformamide (DMF) solutions. The hydrolytic stability of these polymers was determined by keeping the DMF solution in presence of air at room temperature for 20 days. A decrease in ηinh was observed for the B‐polymers and copolymers of B and H. This reduction was less in the copolymers.The thermal behaviour of polyamic acids and polyimides was studied by thermogravimetric and differential thermal analysis techniques. The copolyamic acids were found to be thermally more stable than polyamic acid from B at higher weight losses (about 50%), whereas copolyimides were found to be less stable than polyimide from B. Thermal cyclodehydration of polyamic acids to polyimide occurred at lower temperatures in copolymers than the polymer of B.
Polymerization of lactams XII. Branching of ε‐caprolactam with bislactams
Authors: Kondelíková Jaroslava , Tuzar Zdeněk , Králíček Jaroslav , Šandová Kateřina , Strohalmová Michaela , Kubánek Vladimír 
Published: April 2003

AbstractCopolymers of ε‐caprolactam with bislactams were prepared and the crosslinking ability of individual bislactams was estimated on the basis of the copolymer solubility in m‐cresol. The branching ability established on the basis of the ratio of intrinsic viscosities of the branded and linear polymer with the same Mw depends on the chemical structure of bislactams and serves simultaneously as a measure of their copolymerization ability. Further, a branched sample of poly‐ε‐caprolactam was fractionated and a dependence of the intrinsic viscosity on Mw was obtained. This dependence, showing a deviation from the dependence for the linear poly‐ε‐caprolactam, indicates that the degree of branching increases with the molecular weight of the fractions.
Radiochemical method for evaluating pore size distribution of organic ion exchange resins
Authors: Rahman M. K. , Zuber G. , Lieser K. H. 
Published: April 2003

AbstractThe capacity of various organic ion exchange resins was determined for ammonium ions, tetramethyl, tetraethyl and tetrabutyl ammonium ions. A sharp drop in capacity for tetramethyl ammonium ions was observed in the case of highly crosslinked ion exchangers, normal and macroporous, and still lower values were found for tetraethyl and tetrabutyl ammonium ions. This is explained by the fact that the highly crosslinked resins are too rigid and not able to swell enough in order to accommodate larger ions.
Effect of γ‐irradiation on bisphenol‐a based unsaturated polyesters—part II
Authors: Gupta S. K. , Thampy R. T. 
Published: April 2003

AbstractUnsaturated polyesters made by using bisphenol‐A, dimethyl‐di‐(3,5‐dichloro‐4‐hydroxyphenyl) methane, and dimethyl‐di‐(3,5‐dibromo‐4‐hydroxyphenyl) methane, respectively, were exposed to a does of 18 Mrad from a Co60 source. On irradiation, there is very little change in the halogen content in the polyesters, determined by Parr Bomb method. This indicates their stability to γ‐irradiation. Study of acid value, intrinsic viscosity and isomerisation of these polyesters before and after irradiation corroborates to some extent that incorporation of aromatic rings in the polyester chain stabilises it against radiation. Minor changes in acid values and intrinsic viscosities are discussed.
Polymers with reactive p‐phenylene diamine groups
Authors: Bleha M. , Plichta Z. , Votavová E. , Kálal J. 
Published: April 2003

AbstractSuspension copolymers of N‐ethyl‐N‐(2‐methacroylethyl)‐p‐phenylenediamine (AMBD) and 2‐hydroxyethyl‐methacrylate (HEMA) were prepared and the copolymerization conditions were determined. The reactive copolymers contain a theoretical number of reactive groups capable of reacting with low‐moleculare weight compounds. A change in the porous character of the copolymer has no influence on its reactivity.
Synthesen von Celluloseaustauschern mit chelatbildenden Gruppen II
Authors: Burba P. , Lieser K. H. 
Published: April 2003

AbstractDie Synthese von chelatbildenden Austauschern, die o′‐disubstituierte Diazogruppen enthalten, wird beschrieben. Die Verbindungen werden gewonnen durch Kupplung von Diazoniumcellulose mit 2‐Naphthol, 2‐Naphthylamin bzw. 2‐Naphthylanubderuvaten.
Untersuchung der Aktivität einiger ungesättigter Triazinfarbstoffe bei ihrer Copolymerisation mit Acrylnitril
Authors: Konstantinova Temenuschka 
Published: April 2003

AbstractEs wurde die radikalische Copolymerisation von Acrylnitril in Dimethylformamid‐Lösung in Gegenwart einiger ungesättigter Farbstoffe (Derivate des sym. Triazins) untersucht. Die Abhängigkeit der Polymerisaionsgeschwindigkeit vom Farbstoff und der polymerisationsaktiven Gruppe wurde ermittelt.Kolorimetrisch ergab sich, daß über 80% der Farbstoffe an die Polymerkette gebunden werdon. Anfangskonzentrationen des Farbstoffs von 0,2 Gew.‐% bezogen auf Acrylnitril genügen zur intensiven Einfärbung; dabei fürt die Beteiligung der Farbstoffe an der Polymerisation nicht zu bedeutenden änderungen der Viskositätszahlen bzw. der Mole‐kulargewichte der Farbpolymeren.
Copolymerization of styrene and acrylonitrile with 2,6‐dimethyl‐2,7‐octadiene‐6‐trimethylsilyl‐ether
Authors: Babu G. N. , Bajaj P. 
Published: April 2003

AbstractCopolymerization of 2,6‐dimethyl‐2,7‐octadiene‐6‐trimethylsilyl‐ether (linalloxytrimethylsilane) with styrene and acrylonitrile at 60° and 80°C has been studied in bulk in the presence of benzoyl peroxide. The composition of copolymers was determined from the silicon content and reactivity ratios as calculated by graphical, numerical and computer methods have been compared. In the styrene‐linalloxytrimethylsilane system (St‐LTMS) r1 = 16.8 ± 0.4 and 21.6 ± 0.4 at 60° and 80°C respectively as obtained from Kelen‐Tüdős plots. In (AN‐LTMS) system, r1 = 5.3 ± 0.2 at 60°C, however, r2 (LTMS) in both the systems is zero. This indicates that LTMS does not undergo homopolymerization under the experimental conditions. Poor polymerizability of LTMS has also been supported from the negligible change in bromine number during its homopolymerization. A comparison of relative reactivities of LTMS, vinyltriacetoxy, vinyl triethoxysilane and [(2‐methacryloyloxy)ethoxy]trimethylsilane has been made. Intrinsic viscosity and IR spectra of polymers have been studied.
Télomérisation aux hautes pressions en présence d'hexachlorobutadiène‐1,3 et d'autres monomères chlorés
Authors: Jenner Gérard 
Published: April 2003

AbstractL'hexachlorobutadiëne connu comme composë chimiquement inerte peut agir en tant que tëlogëne dans la tëlomërisation de certains monomëres, parmi les plus courants (sauf les dërivës acryliques). Le tëlomëre cependant n'incorpore l'hexachlorobutadiëne en quantitë apprëciable que si la rëaction est effectuëe sous haute pression. Les volumes d'activation des tëlomërisations sont plus nëgatifs que prévus et suggërent un ëtat de transition plus ecombrë que celui existant dans les homopolymërisations correspondantes. On a enfin comparë l'efficacitë d'autres composés chlorés insaturë. Les tëlomères ä base d'hexachlorobutadiëne offrent une assez bonne rësistance ä l'inflammation.
Polyuretdionpolyurethane und blockierte polyuretdioneneue rohstoffe für pulverlacke
Authors: Müller Peter , Wagner Kuno , Müller Richard , Quiring Bernd 
Published: April 2003

AbstractDie Ringöffnung der Uretdiongruppe in Gegenwart von nukleophilen Reaktionspartner und die technische Bedeutung dieser Reaktionsind Gegenstand der vorliegenden Arbeit. Die Untersuchungen machen deutlich, daß hydroxylgruppenhaltige Polyester und niedermolekulare Zerewitinow‐aktive Wasserstofftome tragende Verbindungen sich bei Temperaturen von 100–120°C in Lösung, aber auch in der Schmelze mit den freien NCO‐Gruppen der Uretdiondiisocyanate nach dem Diisocyanat‐Polyadditionsver‐faren umsetzen lassen, ohne daß nennenswerte Uretdionringöffnung eintritt. Auf Grund dieser Erkenntnis können mit den Uretdiondiisocyanaten Kettenverlängerungen zu Poly‐uretdionpolyurethanen durchgeführt werden. Durch Umsetzung mit Blockierungsmitteln (z.B.ε‐Caprolactam) werden neuartige blockierte Uretdione und blockierte Polyuretdion‐polyurethane erhalten. Es wird nachgewiesen, daß die Vierringe im Temperaturbereich von 140–180°C vollständig aufspalten. Gleichzeitig vorliegende hydroxylgruppenhaltige Verbindungen reagieren mit den latenten NCO‐Gruppen der Uretdione unter Urethanbildung. Durch geeignete Wahl und Kombinatio der Asgangsverbindungen lassen sich kristalline, hochschmelzende, gut mahlbare Polyuretdionpolyurethanpulver gewinnen. Die neuen technisch verwertbaren Synthesen führen zu umweltfreundlichen, lösungsmittel‐freien Verfahen der elektrostatischen Pulverbeschichtung.
Copolymerization of itaconic acid monomethyl ester (1‐carboxy‐1‐carbomethoxymethylethylene) with acrylonitrile in the presence of znci2
Authors: Boudevska Hrisanta , Platchkova Svetla , Velchev Vladimir 
Published: April 2003

AbstractThe copolymerization of itaconic acid monomethylester (1‐carboxy‐1‐carbomethoxy‐methylethylene) with acrylonitrile in presence and in absence of ZnCI2 was investigated. The reactivity ratios of the monomer pairs itaconic acid monomethyl ester‐acrylonitrile (r1=0,05±0,02; r2=0,21±0,02) and itaconic acid monomethylester/ZnCl2‐acrylonitrile (r1=0,14±0,05; r2=0,41±0,03) are determined by the Kelen‐Tüdős and Fineman‐Ross method.
Beitrag zur kenntnis des chemismus der beschleunigten harzvulkanisation mit hilfe der ir‐und der mössbauer‐spektroskopie. I. Chemische umwandlung des vulkanisationssystems harz‐zinn(ii)‐halogenid
Authors: Christov Dimitr , Nenov Nedialko , Busowa Zweta 
Published: April 2003

AbstractBeim Erhitzen von Phenol‐Formaldehyd‐Vulkanisationsharzen reagieren in reinem Zustand bei der Vulkanisationstemperatur (170°C) nur die Methylogruppen, während die Dimethylenäthergruppen unverändert bleiben. Die Dimethylenätherbrücken splten zum Teil durch den aktiven Füllstoff, größtenteils jedoch unter der Wirkung des Halogen‐wasserstoffs, der bei der chemischen Veränderung des Zinn(II)‐halogenid‐Beschleuigers gebildet wird, auf.
Solution synthesis and thermal characterization of lead iv polyesters
Authors: Carraher Charles E. , Reese Charlene Deremo 
Published: April 2003

AbstractPolyesters of the below form are prepared by the solution method. Synthesis and isolation procedures are presented and discussed. The reaction is rapid, occurring in generally less than 30s.
magnified imageThermal properties of the polyesters were studied by differential thermal analysis and thermogravimetric analysis.
Etude des copolymères acryliques utilisés dans l'encollage de fils de polyester. I. Caractéristiques physicochimiques des copolymères et leurs interactions avec des fils de polyester
Authors: Lucas Jean‐Michel , Berticat Philippe , Chabert Bernard , Soulier Jean‐Pierre , Gavet Louis , Valentin Noëlle 
Published: April 2003

AbstractL'encollage d'un fil a pour but de le protéger au cours du tissage contre les sollicitations mécaniques auxquelles il est soumis. Deux copolymères acryliques commerciaux employés pour l'encollage de fils polyester à filaments continus sont étudiés: un copolymère A (acrylonitrile‐acide acrylique caractéristique d'éthyle) caractéristique d'un bon encollage. Une corrélation est établie entre les paramètres physicochimiques des ces matériaux et l'effica‐cité de l'encollage.Les interactions fils de polyester‐colles (ou produits moddèles) sont étudiés en solution ou à l'état sec. Il apparaît que l'eau joue un rôle important par son action plastifiante. La présence d'acrylate d'éthyle favorise l'imprégnation des fils polyester par la colle B en solution aqueuse. L'adhésion à l'état sec est assurée essentiellement par l'acide acrylique. Le rôle des agents neutralisants et des huiles d'ensimage est aussi discuté.
Some wood polymer composites ii
Authors: Moustafa A. B. , Kandil E. E. , Hady B. A. , Ghanem N. A. 
Published: April 2003

AbstractSeveral samples of casuarina and other sorts of wood were impregnated in methyl methacrylate (MMA) or its mixture with some other specific multifunctional monomers, such as ethylene glycol dimethacrylate (EGDMA), triethylene glycol dimethacrylate (TEGDMA), trimethylol propane trimethacrylate (TMPTMA) and tetrahydrofurfuryl methacrylate (THFMA). The monomer or mixture of monomers in the treated samples was polymerized either by being subjected to γ‐radiation from a60Co‐γ‐cell or by using 0.1 wt.‐% of benzoyl peroxide, or by employing both methods.The use of swelling agents was found to influence the gained monomer, polymer and the physical properties of the treated products, though the specific multifunctional monomer role has not yet clearly been identified, due to the variation in uniformity of distribution of wood constituents from one test piece to the other. 30kJ/kg were found to be the optimal dose for the highest compression strength. With 2000 and a 500 curie‐60Co sources, we found the same effect, and came to the conclusion that the dose rate was not important in the used ranges.
Metallkatalysatoren in der herstellung von polyäthylenterephthalat. 1. Modelluntersuchungen zur mechanistischen deutung der metallionenkatalyse
Authors: Wolf Karl‐Heinz , Herlinger Heinz 
Published: April 2003

AbstractEs wurden Untersuchungen mit dem Ziel durchgeführt, den Mechanismus der Metallio‐nenkatalyse solcher Veresterungsreaktionen aufzuklären, welche zu linearem hochmolekularem Polyäthylenterephthalat führen. Aus den erhaltenen Ergebnissen künnen zwar keine universellen Kriterien zur Optimierung der Katalyse erhalten werden, da die Problematik an Modellverbindungen studiert werden muß, jedoch lassen sich die chemi‐schen Gesetzmäßigkeiten der Metallkatalyse von Veresterungsreaktionen, in diesem Falle von Umesterung und Polykondensation, gut erkennen.
Über die orientierung von polyäthylenterephthalat‐spinnfäden
Authors: Liska Ewald 
Published: April 2003

AbstractDie Orientierung unverstreckter PET‐Spinnfäden kann mit Hilfe des Schrumpf‐vermögens, der Schrumpfspannung und der Doppelbrechung gemessen werden. Es Zeit sich, daß diese Größen unterschiedliche Aspekte des jeweiligen Orientierungszu‐standes beschreiben und beim Spinnen und Tempern durch verschiedene Verfahrenspara‐meter unterschiedlich beeinflußt werden. Im einzelnen wurden insbesondere der Schrumpf‐vorgang in Abhängigkeit von der Tremperatur, der Zeit und dem Meßmedium untersucht.
Antioxidants and stabilizers. LXVI. Oxidation and photooxidation of methyl‐ and octadecyl‐3‐(3,5‐di‐tert‐butyl‐4‐hydroxyphenyl)propionates. quenching of singlet oxygen
Authors: Samsonova L. V. , Taimr L. , Pospíšil J. 
Published: April 2003

AbstractPhotooxidation of the methyl ester (Ib) and octadecyl ester of 3‐(3,5‐di‐tert‐butyl‐4‐hydroxyphenyl) propionic acid (Ic) sensitized with methylene blue gives rise to cyclohexadienone hydroperoxides IIIb or IIIc. The reaction proceeds via singlet oxygen. The photochemical stability of both hydroperoxides was examined in the presence and absence of sensitizer. The thermal decomposition of both hydroperoxides leads to the respective starting phenols Ib or Ic. Oxidation of Ib with lead dioxide yields IV, an effective quencher of singlet oxygen, the effect of which approaches that of β‐carotene. In a neutral medium Iv is stable against oxidation. The transformations are investigated with respect to the system of processes occurring in the aging of stabilized polyolefins.
Application de la spectrométrie de rayons x à l'analyse de matériaux macromoléculaires. I. Etude de polymères à base de chlore
Authors: Rouchon Jean‐Paul , Sage Daniel , Romand Maurice , Bador René , Berticat Philippe 
Published: April 2003

AbstractLa détermination des teneurs en chlore de polyéthylénes chlorés dans la masse (entre 20 et 70% environ) est réalisée par spectrométrie de fluorescence X conventionnelle d'une part, par spectrométrie X dispersive en énergie d'autre part. Cette étude est conduite en opérant une dissolution de ces matériaux dans la cyclohexanone ou la décaline et un utilisant une cellue spéciale permettant une détection sous vide de la radiation caractéristique Cl Kα. Par ailleurs on montre que la détermination des taux de chlore dans des polymères fortement chlorés (polychlorure de vinyle (PVC), PCV chlorés, poly‐chlorure de vinylidène (PCVD), PCV+PCVD) peut être réalisée directement sur le solide pastillé en mesurant le rapport des intensités de diffusion Rayleigh et Compton des radiations WLα et AgKα caractéristiques des tubes à anticathode de tungstène et d'argent.
Contribution to the study of the submicroscopic structure of macroporous polymers. Calculation of the magnitude of submicroscopic particles and pores from specific pore volumes and specific surfaces
Authors: Hradil J. 
Published: April 2003

AbstractA model series of ordering of submicroscopic spherical particles forming the basic structure of macroporous copolymers is suggested by analogy with elementary crystallographic lattices. This series with various porosity (p=25.95‐78.53%) allows not only the calculation of the mean radius of submicroscopic particles, but also a better choice of the coefficient used in calculating the mean pore radius from specific pore volumes and specific surfaces. A general method of calculation of the mean particle radius and of the mean pore radius for macroporous copolymers is also proposed, and a comparison with real systems is made.
Polyimide copolymers by condensation of one dianhydride and two diisocyanates
Authors: Ghatge N. D. , Dandge D. K. 
Published: April 2003

AbstractCopolyimides were prepared by reacting 3,3′,4,4′‐benzophenone tetracarboxylic acid dianhydride (BPTD) with mixtures of various proportions of 3,3′‐sulfonylbis (phenyl isocyanate) (SDI) and 4,4′‐methylenebis (phenyl isocyanate) (MDI) in an aprotic polar solvent. The nature and properties of these copolyimides were studied.
Thermal degradation of poly(vinyl chloride) in alkyl maleates
Authors: Varma I. K. , Sharma K. K. 
Published: April 2003

AbstractThe thermal degradation of poly(vinyl chloride) has been investigated in diethyl, dibutyl and dioctyl maleate under nitrogen from 160°C to 210°C. The rate of dehydrochlorination was highest in dibutyl maleate and lowest in dioctyl maleate. The apparent activation energy calculated from the average value of the rate constant at each temperature for diethyl, dibutyl and dioctyl maleate was found to be 83.6 kJ mole−1, 112.7 kJ mole−1, and 150.5 kJ mole−1, respectively. The rates of dehydrochlorination and the activation energy observed in alkyl maleates are higher than those observed in ethyl benzoate. In the visible range spectra the absorption at higher wavelengths is considerably reduced in alkyl maleates.
Pfropfung von acrylmonomeren auf cellulose durch Ag(II)‐salz‐initiierung
Authors: Valk Giselher , Gerlach Eberhard 
Published: April 2003

AbstractDurch Initiierung mit [Ag(II) (C5H5N)4]S2O8 wurde Acrylsäuremethylester auf Viskose gepfropft und eine Pfropfausbeute bis 50% erzielt. Vergleichbare Ausbeuten ergab auch eine Initiatormischung von AgNO3 und (NH4)2S2O8. Hierbei ließ sich der Ag‐Ionenanteil ohne Pfropfverlust bis auf 0,005 m reduzieren, wenn die Peroxydisulfationen‐Konzentration entsprechend erhöht wurde.
Synthese von celluloseaustauschern mit chelatbildenden funktionellen gruppen III
Authors: Burba P. , Röber M. , Lieser K. H. 
Published: April 2003

AbstractDie Darstellung von Austauschern mit Kapazitäten zwischen 0,15 und 0,8 mmol/g auf der Basis von mikrokristalliner und amorpher Cellulose, „Bead”︁‐Cellulose, kurzfaseriger und langfaseriger Cellulose (Watte) und Baumwollgewebe mit 1‐(2‐Hydroxyphenylazo)‐2‐naphthol (Hyphan), Brenzcatechin, Chinalizarin, Alizarin, 4‐(Pyridyl‐(2)‐azol)‐resorcin, Glyoxalbis(2‐hydroxyanil), Pyrogallol, 2‐(Thiazolyl‐(2)‐azol)‐4‐methoxyphenol, Arsenazo III und 5‐(4‐Dimethylaminobenzyliden)‐rhodanin als Ankergruppen wird beschrieben.
Graft polymerization of 2‐methyl‐5‐vinyl pyridine on poly(ethylene terephthalate) fibres using H2O2 as initiator
Authors: Hebeish A. , Shalaby S. E. , El‐Shahid M. F. 
Published: April 2003

AbstractGraft polymerization of 2‐methyl‐5‐vinyl pyridine (MVP) on unstretched poly(ethylene terephthalate) fibers (PET) using H2O2 as initiator was investigated under different conditions. The extents and rates of grafting, homopolymer and total conversion depended upon concentration of the initiator and the monomer as well as on the polymerization temparature. The extent and rate of grafting decreased as the H2O2 concentration increased from 6.82x10−2 to 27.29x10−2 mol · 1−1. The same holds for the extents and rates of homopolymerization and total conversion. Whereas the extents and rates of grafting and total conversion increased significantly by increasing the MVP concentration from 0.162 to 0.648 mol.1−1. Raising the polymerization temperature from 65 to 95°C was also accompanied by a significant enhancement in the extents and rates of grafting and total conversion. Stretching the PET fibres prior to grafting reduced appreciably the susceptibility of the fibres towards grafting, being dependent on the magnitude of stretching.
Modification of poly(vinyl chloride). XXXIV. Crosslinked poly(vinyl chloride) via paste‐processing
Authors: Mori Kunio , Nakamura Yoshiro , Hayakari Tsuzuko 
Published: April 2003

AbstractA novel PVC‐crosslinking technique using 6‐dibutylamino‐1,3,5‐triazine‐2,4‐dithiol (DB) was applied for a paste processing to produce a crosslinked PVC product. The paste formulation recommended in the present study consisted of 100 parts of PVC (Zeon 121), 60 parts of dioctyl phthalate, 0.2 parts of MgO, and 6 parts of a 50% solution of DB‐Na in butylcarbitol, which gave a highly crosslinked and transparent sheet with an excellent stability for thermal discolouring. The increasing viscosity behaviour of the paste during storage is explained by the effect of interparticle attracting forces of DB‐Na which coordinates to the ether oxygen atoms in the glycol derivatives adsorbed on the surface of PVC particles. The increased viscosity can be reduced by addition of 3 parts of N‐butyl‐benzene‐sulfonamide.The tension‐distortion properties at elevated temperatures were remarkably improved at the crosslinked product compared with the uncrosslinked. The mechanical properties of the two crosslinked products produced via paste processing and roll‐blending are compared in regard to the differences of the uniformity of crosslinking units.