高牵引速率下iPP/玻璃纤维复合材料界面结晶  

Interfacial Crystallization in Isotactic Polypropylene/Glass Fiber Composites at High Fiber-Pulling Rate

作　　者：秦怡靖 徐亚虎 张丽颖[1] 郑国强[1] 刘春太[1] 

机构地区：[1]郑州大学材料科学与工程学院,材料成型及模具教育部重点实验室,河南郑州450001

出　　处：《现代塑料加工应用》2014年第6期12-15,共4页Modern Plastics Processing and Applications

基　　金：国家自然科学基金(51173171)资助

摘　　要：在等规聚丙烯(iPP)熔体中高速牵引玻璃纤维(GF)的过程中,首次发现GF表面出现了一层具有明显厚度的包覆结构,并对这种结构在牵引过程中的变化规律及其对界面结晶形貌的影响进行分析研究。结果表明,包覆结构的产生可能是GF在高牵引速率下使iPP分子链克服自身屈服应力而沿着纤维轴方向伸展取向并堆积的结果;该结构为热力学稳定的α晶,且具有诱导iPP生成β横晶的能力。While pulling a single glass fiber （GF） at high pulling rate in isotactic polypropylene （iPP） melt, a layer of coating structure with obvious thickness was found for the first time on the surface of GF. Then the change of the coating structure during fiber pulling and its influence on the morphology of interfacial crystallization were studied. The results reveal that iPP molecular chains can overcome their own yield stress, and stretch, orient and accumulate along with the GF axial under the displacement of GF at high pul ling rate, which leads to the appearance of this coating structure. Meanwhile, the coating structure shows the thermodynamically stable α crystal, and it can induce the formation of β-iPP transcrystallinity.

关 键 词：等规聚丙烯 玻璃纤维 高牵引速率 包覆结构 β横晶 

分 类 号：TQ327.1[化学工程—合成树脂塑料工业]