气体辅助注射成型聚苯乙烯制品取向研究  

Shrinkage of Polystyrene Molded by Gas-Assisted Injection Molding

作　　者：郑国强[1] 谢英[1] 刘春太[1] 

机构地区：[1]郑州大学材料科学与工程学院橡塑模具国家工程研究中心,河南郑州450002

出　　处：《上海塑料》2008年第3期15-18,共4页Shanghai Plastics

基　　金：国家自然科学基金重大项目(10590352);河南省自然科学基金项目(0612002000)

摘　　要：聚合物制品的收缩率可以间接地反映其分子链的取向行为。通过在不同退火温度下聚苯乙烯气体辅助注射成型制品表层和气道层收缩率的测量,研究其不同部位的收缩率。结果表明:表层区域的收缩率明显大于气道层区域的收缩率;在比较收缩率的基础上,探讨了非晶聚合物在气体辅助注射成型工艺过程中的取向机理。Annealed at different temperature, the shrinkage of the skin and gas channel region in polystyrene molded by gas-assisted injection molding （GAIM） was studied. It is found that the shrinkage ratio of the skin region is obviously larger than that of the gas-channel region, implying that significant orientation is occurred in the skin region. In addition, the orientation mechanism of the non-crystalline polymer molded by GAIM is discussed.

关 键 词：收缩 气体辅助注射成型 取向 气体穿透 

分 类 号：TQ320[化学工程—合成树脂塑料工业]