Interfacial interaction enhancement by shear-induced β-cylindrite in isotactic polypropylene/glass fiber composites
writer：Yijing Qin, Yahu Xu, Liying Zhang, Guoqiang Zheng(通訊作者), Xingru Yan, Kun Dai, Chuntai Liu, Changyu S
keywords：Interfacial crystallization, β-Cylindrite， Mechanical properties
source：期刊
specific source：Polymer, 2016, 100, 111-118
Issue time：2016年
Isotactic polypropylene (iPP)/glass fiber (GF) composites with different specific interfacial features (viz., a-spherulite, a-cylindrite and b-cylindrite) were prepared via shear-induced interfacial crystallization. aspherulite, a-cylindrite and b-cylindrite were successively encouraged at the interface between iPP matrix and GF with increasing the fiber-pulling speed. Moreover, the composite specimens containing bcylindrite exhibited remarkably higher interfacial shear strength (IFSS) than those containing a-spherulite or a-cylindrite, as demonstrated by the single fiber fragmentation test (SFFT). More interestingly, simultaneously improved tensile strength and toughness were observed in the presence of b-cylindrite. This study offers a new insight that b-cylindrite produced by shear is an alternative approach to achieve comprehensive mechanical properties for the iPP/fiber composite systems.