摘要
通过扫描电镜(SEM)观察了气体辅助注射成型(GAIM)和常规注射成型(CIM)高密度聚乙烯(HDPE)的结晶形态,发现CIM试样为区分不明显的皮芯结构,而GAIM试样形成了包括球晶、串晶和取向片晶的多层结构。且GAIM试样球晶尺寸显著小于CIM制品。在结晶形态分析的基础上,初步探讨了气体辅助注射成型制品结晶形态的形成机理。
Scanning electronic microscopy was adopted to explore the crystalline morphology of HDPE molded by gas assisted injection and conventional injection. The results show that a multilayer structure was formed in the GAIM parts with several kinds of crystalline structure, including spherulite, shish-kebab, and oriented parallel lamellar stacks, which was not observed in CIM. Moreover, the spherulite sizes of GAIM parts are obviously small than CIM ones.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2007年第5期198-201,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金重大项目(10590351)
国家重点基础研究项目(2005CB623808)
关键词
气辅注射
串晶
气体穿透
刻蚀
gas assisted injection molding
shish-kebab
gas penetration
etching
