UNASSIGNED: Chemical modification of Rubberwood ( @entity15543 M  ll.Arg) with @entity70018 ( @entity9348 ) in the presence of anhydrous @entity15484 as a catalyst has been carried out under solvent free conditions. The level of modification was estimated by determining the weight percent gain and modified wood was characterized by FTIR-ATR and @entity2723 /MAS @entity7352 NMR spectroscopy. The effect of catalyst concentration on WPG was studied. UV resistance, moisture adsorption and dimensional stability of modified wood were evaluated. UV resistance of modified wood was evaluated by exposing unmodified and modified wood to UV irradiation in a QUV accelerated weathering tester. Unmodified wood showed rapid color changes and degradation of lignin upon exposure to UV light. Chemical modification of wood polymers with @entity9348 was effective in reducing light induced color changes (photo-yellowing) at wood surfaces. In contrast to unmodified wood, modified wood exhibited bleaching. FTIR analysis of modified wood exposed to UV light indicated stabilization of wood polymers against UV degradation. Modified wood showed good dimensional stability and hydrophobicity. Thermogravimetric analysis showed that modification with @entity9348 improved thermal stability of wood. Improved dimensional stability and UV resistance of modified wood indicates @entity9348 as a promising reagent since there is no acid byproduct of reaction as observed in case of other esterification reactions.

UV resistance and dimensional stability of wood modified with XXXX .

@entity15484 :: ('MESH:C010845', 'Chemical') :: ['aluminum chloride'] @entity7352 :: ('CHEBI:36928', 'Chemical') :: ['(13)C'] @entity15543 :: ('3981', 'Species') :: ['Hevea brasiliensis'] @entity70018 :: ('MESH:C555950', 'Chemical') :: ['isopropenyl acetate'] @entity9348 :: ('CHEBI:17824', 'Chemical') :: ['IPA'] @entity2723 :: ('MESH:C566991', 'Disease') :: ['CP']
@entity70018 :: (MESH:C555950,Chemical) :: ['isopropenyl acetate']
