title: Effect of fibre treatments on interfacial shear strength of hemp fibre reinforced polylactide and unsaturated polyester composites

authors: Sawpan, Moyeenuddin Ahmad

subjects: fibres

abstract: Surface treatment of hemp fibres was investigated as a means of improving interfacial shear strength (IFSS) of hemp fibre reinforced polylactide (PLA) and unsaturated polyester (UPE) composites. Fibres were treated with sodium hydroxide, acetic anhydride, maleic anhydride and silane. A combined treatment using sodium hydroxide and silane was also carried out. IFSS of PLA/hemp fibre samples increased after treatment, except in the case of maleic anhydride treatment. Increased IFSS could be explained by better bonding of PLA with treated fibres and increased PLA transcrystallinity. The highest IFSS was 11.4 MPa which was obtained for the PLA/alkali treated fibre samples. IFSS of UPE/hemp fibre samples increased for all treated fibres. This is believed to be due to the improvement of chemical bonding between the treated fibres and the UPE as supported by FT-IR results. The highest IFSS (20.3 MPa) was found for the combined sodium hydroxide and silane treatment fibre/UPE samples.

text: Effect of fibre treatments on interfacial shear strength of hemp fibre reinforced polylactide and unsaturated polyester composites Surface treatment of hemp fibres was investigated as a means of improving interfacial shear strength (IFSS) of hemp fibre reinforced polylactide (PLA) and unsaturated polyester (UPE) composites. Fibres were treated with sodium hydroxide, acetic anhydride, maleic anhydride and silane. A combined treatment using sodium hydroxide and silane was also carried out. IFSS of PLA/hemp fibre samples increased after treatment, except in the case of maleic anhydride treatment. Increased IFSS could be explained by better bonding of PLA with treated fibres and increased PLA transcrystallinity. The highest IFSS was 11.4 MPa which was obtained for the PLA/alkali treated fibre samples. IFSS of UPE/hemp fibre samples increased for all treated fibres. This is believed to be due to the improvement of chemical bonding between the treated fibres and the UPE as supported by FT-IR results. The highest IFSS (20.3 MPa) was found for the combined sodium hydroxide and silane treatment fibre/UPE samples.

year: 2011

title: Against epistocracy

authors: Munn, Nicholas

abstract: There has been a recent resurgence in epistocratic arguments against our democratic institutions. Jason Brennan (2009, 2011, 2016) is a popular representative of the approach. Here, I criticise Brennan’s account and offer an alternative analysis of modern democratic societies. I argue that Brennan has not shown that the currently enfranchised are relevantly incompetent such that they ought to be excluded from the franchise. Further, even had he shown this, his proposed solution suffers from the same injustices he diagnoses in democracies. I consider an alternative means of embracing a restrictive franchise.

text: Against epistocracy There has been a recent resurgence in epistocratic arguments against our democratic institutions. Jason Brennan (2009, 2011, 2016) is a popular representative of the approach. Here, I criticise Brennan’s account and offer an alternative analysis of modern democratic societies. I argue that Brennan has not shown that the currently enfranchised are relevantly incompetent such that they ought to be excluded from the franchise. Further, even had he shown this, his proposed solution suffers from the same injustices he diagnoses in democracies. I consider an alternative means of embracing a restrictive franchise.

year: 2018

title: Introduction to special section on Māori culture and education.

authors: Bishop, Russell

subjects: language policy

abstract: An introduction is presented in which the editor discusses various reports within the issue on topics including the need for coordinated language policy, the Treaty of Waitangi, and monoculturalism.

text: Introduction to special section on Māori culture and education. An introduction is presented in which the editor discusses various reports within the issue on topics including the need for coordinated language policy, the Treaty of Waitangi, and monoculturalism.

year: 2002