PP／PDMS共混物的连续挤出发泡成型  

Continuous Extrusion Foaming of Polypropylene/ Polydimethylsiloxane Blend

作　　者：吴清锋[1] 周南桥[1] 翟丽[1] Chul B.Park 

机构地区：[1]华南理工大学聚台物新型成型装备国家工程研究中心,广东广州510640 [2]多伦多大学微孔塑料制造实验室,加拿大多伦多M5S 3G8

出　　处：《塑料科技》2009年第2期39-42,共4页Plastics Science and Technology

摘　　要：用二氧化碳作为发泡剂,利用串联发泡挤出系统研究了聚丙烯(PP)/聚二甲基硅氧烷(PDMS)混合物的膨胀比及泡孔密度,同时用马来酸酐接枝PP(PP-g-MAH)作为增容剂来提高PDMS与PP的相容性。结果表明,混合物的最大膨胀比可达25倍,而纯PP的最大膨胀比只有8倍。另外,与纯PP相比,混合物的泡孔密度显著提高(尤其是在低发泡剂浓度时)。Selecting CO2 as foaming agent, the expansion ratio and cell density of Polypropylenel Polydimethylsiloxane （PP/PDMS） were studied by using series foaming extrusion system. The compatibility of the PP/PDMS was improved through adding the PP-g-MAH.The results showed that the maximum expansion ratio of the blend foams increased to as much as twenty-five-fold whereas the maximum expansion ratio of pure PP was below 8-fold with the same die. Overall, to compared with pure PP, the cell density of the PP/PDMS was improved significantly （at a low content of foaming agent）.

关 键 词：聚丙烯 聚二甲基硅氧烷 挤出发泡 膨胀比 泡孔密度 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]