Influence of accelerated ageing on the physico-mechanical properties of alkali-treated industrial hemp fibre reinforced poly(lactic acid) (PLA) composites

被引：125

作者：

Islam, M. S. ^{[1
]}

Pickering, K. L. ^{[1
]}

Foreman, N. J. ^{[2
]}

机构：

[1] Univ Waikato, Dept Engn, Hamilton, New Zealand

[2] Hemptech, Auckland, New Zealand

来源：

POLYMER DEGRADATION AND STABILITY | 2010年 / 95卷 / 01期

关键词：

Hemp fibre; Polylactic acid; Accelerated ageing; Impact strength; Fracture toughness; WOOD; CRYSTALLIZATION; NANOCOMPOSITE; IRRADIATION; DURABILITY; POLYMERS; SOFTWOOD; BEHAVIOR; FILMS; IR;

D O I：

10.1016/j.polymdegradstab.2009.10.010

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

30 wt% aligned untreated long hemp fibre/PLA (AUL) and aligned alkali treated long hemp fibre/PLA (AAL) composites were produced by film stacking and subjected to accelerated ageing. Accelerated ageing was carried out using UV irradiation and water spray at 50 degrees C for four different time intervals (250, 500, 750 and 1000 h). After accelerated ageing, tensile strength (TS), flexural strength, Young's modulus (YM), flexural modulus and mode I fracture toughness (K(Ic)) were found to decrease and impact strength (IS) was found to increase for both AUL and AAL composites. AUL composites had greatest overall reduction in mechanical properties than that for AAL composites upon exposure to accelerated ageing environment. FTIR analysis and crystallinity contents of the accelerated aged composites support the results of the deterioration of mechanical properties upon exposure to accelerated ageing environment. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：59 / 65

页数：7

共 35 条

[1] Suitability of steam exploded residual softwood for the production of binderless panels.: Effect of the pre-treatment severity and lignin addition [J].