作者：Xianhu Liu, Guoqiang Zheng, Kun Dai, et al.
关键字：water-assisted injection molding; lamellar; orientation; polyethylene (PE); SAXS
论文来源：期刊
具体来源：Journal of Materials Science
发表时间：2011年

Journal of Materials Science，2011，46（24）：7830~7838 

It is well known that water-assisted injection molding (WAIM) process can be fulfilled based on the melt filling stage of conventional injection molding (CIM) process. However, due to the different physical fields involved during WAIM and CIM processes, WAIM part should exhibit unique morphological features compared with the CIM one. In this study, isotactic polypropylene (iPP) parts were prepared by WAIM and CIM, respectively, and their comparative study on morphology were therefore carried out by means of polarized optical microscopy (POM) and two-dimensional (2D) wide-angle X-ray diffraction (WAXD). POM observations illustrated that the WAIM part exhibits a ‘‘skin–core–water channel’’ structure, while the CIM part shows a typical ‘‘skin–core’’