Mechanical and thermal properties of environment-friendly "green" composites made from pineapple leaf fibers and poly(hydroxybutyrate-co-valerate) resin
Mechanical and thermal properties of environment-friendly "green" composites made from pineapple leaf fibers and poly(hydroxybutyrate-co-valerate) resin
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DOI：
10.1002/pc.10363
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发表时间：
1999-06-01
影响因子：
5.2
通讯作者：
Netravali, AN
中科院分区：
文献类型：
--
作者：
Luo, S;Netravali, AN
研究了菠萝纤维与聚羟基丁酸-戊酸共聚物（PHBV）树脂制备的单向、可降解、环境友好的“绿色”复合材料的力学性能和热性能。测试了不同纤维含量的“绿色”复合材料的纵向和横向拉伸和弯曲性能。与原始树脂相比，“绿色”复合材料的拉伸强度和弯曲强度在纵向上显著较高，而在横向上较低。然而，机械性能低于简单模型预测的那些。拉伸断裂表面的扫描电子显微镜（SEM）照片显示纤维从基体中拔出、界面失效、纤维原纤化和“绿色”复合材料的非单向性质。通过差示扫描量热法（DSC）和热重分析（TGA）研究了“绿色”复合材料的热行为，结果表明菠萝纤维的存在不影响PHBV树脂的非等温结晶动力学、结晶度和热分解。
This paper presents the mechanical and thermal properties of unidirectional, degradable, environment-friendly "green" composites made from pineapple fibers and poly(hydroxybutyrate-co-valerate) (PHBV) resin. Tensile and flexural properties of the "green" composites with different fiber contents were measured in both longitudinal and transverse directions. Compared to those of virgin resin, the tensile and flexural strengths of "green" composites are significantly higher in the longitudinal direction while they are lower in the transverse direction. However, the mechanical properties are lower than those predicted by simple models. Scanning electron microscope (SEM) photomicrographs of the tensile fracture surfaces demonstrate fibers being pulled out from the matrix, the interfacial failure, fiber fibrillation, and the nonunidirectional nature of the "green" composites. The thermal behavior of the "green" composites, studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), showed that the presence of pineapple fibers does not affect the nonisothermal crystallization kinetics, crystallinity, and thermal decomposition of PHBV resin.