摘要
利用二维宽角X射线衍射技术(2D-WAXD),研究了聚丙烯/聚对苯二甲酸乙二醇酯(PP/PET)共混物注射成型试样在厚度方向的取向分布结构。结果表明,PP/PET共混物中各层取向度参数都小于纯PP试样,而且取向度参数在厚度方向上的差异也比纯PP小;增容后的PP/PET共混物,从"皮层"到"芯层"取向度参数在0.3～0.4间,"皮-芯"结构得到明显抑制;碳纳米管(CNTs)加入到PET分散相中可以促进PET在注射成型周期内结晶,提高其结晶度;加入增容剂后,试样的强度和刚性都比PP高;CNTs的加入使试样的弯曲模量较纯PP提高约20%。
In this study, the molecular orientation distributions and crystalline structure in the thickness direction of injection molded PP/PET blends were characterized by two-dimensional wide-angle X-ray scattering （2D-WAXS）. It showed that the orientation parameters for PP/PET blends were lower than neat PP in every layer. Furthermore, the distinction of orientation parameters of the blends between skin layer and core region was also smaller than pure samples. In the sample of compatibilized PP/PET, the orientation parameter along the thickness was about 0. 3-0. 4, which indicated that the skin-core structure of this sample was greatly restrained. Addition of carbon nanotubes（CNTs） accelerated the crystallization rate of PET dispersed phase, and increased the crystallinity. After addition of CNTs, its bending modulus was 20 % higher than pure PP.
出处
《中国塑料》
CAS
CSCD
北大核心
2012年第10期50-56,共7页
China Plastics
关键词
聚丙烯
聚对苯二甲酸乙二醇酯
注射成型
取向结构
polypropylene
poly（ethylene terephthalate）
injection molding
orientation structure
