Tensile and uniaxial fatigue behavior of poly(p-phenylene-co-3,4′-oxydiphenylene terephthalamide) fibers:: Relationship with chain orientation
Tensile and uniaxial fatigue behavior of poly(p-phenylene-co-3,4′-oxydiphenylene terephthalamide) fibers:: Relationship with chain orientation
复制标题
DOI：
10.1177/004051759906900106
复制
发表时间：
1999-01-01
影响因子：
2.3
通讯作者：
Delvael, Y
中科院分区：
文献类型：
--
作者：
Ferreira, M;Lam, TM;Delvael, Y
本文研究了聚对苯二甲酰对苯二胺 (PPTA) 纤维和聚对苯二甲酰对苯二胺 (PPTA) 纤维的物理性能。关于拉伸响应，两种纤维表现出几乎相同的弹性变形，并且在拉伸过程中模量显着增加。然而，当涉及拉伸-拉伸疲劳行为时，它们形成了鲜明的对比。 PPTA 增加一定量后，模量下降得相当快，而 PpPOT 的下降速度要慢得多。这些观察结果被解释为与负载下聚合物的链和微晶运动相关，并且还比较了氢键对滑移的影响。
This paper investigates the physical properties of poly(p-phenylene-co-3,4'-oxy-diphenylene terephthalamide) [PpPOT] fibers in comparison with poly(p-phenylene terephthalamide) (PPTA) fibers. With regard to tensile responses, the two fibers show nearly the same elastic deformation with significant modulus increase during extension. However, they form a singular contrast when it comes to tensile-tensile fatigue behavior. The modulus decreases quite rapidly after some increase for PPTA, while the decrease is much slower for PpPOT. These observations are interpreted in correlation with the chain and crystallite movements of the polymers under load, and the influence of hydrogen bonds on slipping is also compared.