纤维增强树脂基复合材料中的横穿结晶研究

在以结晶性聚合物为基体树脂的纤维或织物增强复合材料中,经常出现横穿结晶(横晶)界面相。本文综述了近年来对纤维增强树脂基复合材料中横穿结晶的研究,内容包括横晶的概念,纤维表面诱导成核的机理,纤维诱导成核的能力和条件,横晶的生长和终止以及横晶的力学效应等。在不同的树脂/纤维复合材料体系中,由于其横穿结晶本身和本体球晶在尺寸和数目比例等方面呈现各不相同的复杂局面,横晶对复合材料性能的影响显得复杂。通过各种手段调控横晶的形态、尺寸及数量,使横晶的存在有利于复合材料整体性能的提高,是进行纤维增强结晶性聚合物基复合材料设计时应该遵循的一个基本原则。

Review of Development on the Transcrystallinity in Fiber Reinforced Polymer-based Composites

Transcrystallinity(TC)is often occurred in fiber reinforced semi-crystalline polymer-based composites.In this paper we reviewed recent developments on TC in fiber reinforced resin-based composites.The concept of TC,arguments on the formation mechanisms of TC,the investigation of the ability and conditions of fiber surface-induced nucleation,the understanding of the growth and the termination of TC,the survey of mechanical properties of TC and the influences of TC on the mechanical properties of composites were introduced respectively.It has been pointed out that,due to the difference of the dimension and the number ratio of TC and spherites in various resin/fibers composites,the influence of TC on the properties of composites seems to be complex.Doing one's best to make the properties of composites improved by regulating the morphology,dimension and numbers of TC,it should be an essential rule to be followed in the design of fiber reinforced semi-crystalline polymer-based composites.