聚二甲基硅氧烷对聚丙烯发泡成型的影响  

Effect of PDMS on Foaming Process of Polypropylene

作　　者：许佳润 周南桥 王明义[1,2] 

机构地区：[1]华南理工大学聚合物新型成型装备国家工程研究中心聚合物成型加工工程教育部重点实验室,广东广州510640 [2]郑州轻工业学院,河南郑州450002

出　　处：《塑料科技》2010年第9期47-50,共4页Plastics Science and Technology

摘　　要：以超临界CO2为发泡剂,以马来酸酐接枝聚丙烯(PP-g-MAH)为相容剂,在连续挤出发泡过程中研究了聚二甲基硅氧(烷PDMS)对无规共聚聚丙烯(R-PP)发泡性能的影响。结果表明:当CO2用量为5%时,少量PDMS和PP-g-MAH的加入能提高R-PP发泡样品的膨胀率;与纯R-PP相比,R-PP/PP-g-MAH/PDMS共混物在各个温度下发泡样品的泡孔密度要明显高于纯PP发泡样品的泡孔密度。The effect of PDMS on foaming performance of R-PP was investigated in extrusion foaming process, using supercritical carbon dioxide as the blowing agent and PP-g-MAH as the coupling agent. The results showed that the addition of a small amount of PDMS and PP-g-MAH improved the expansion ratio of R-PP foamed samples when the content of CO2 was 5%. Furthermore, compared with pure R-PP, cell density of foamed samples obtained from R-PP/PP-g-MAH/PDMS blends was obviously higher than that of pure R-PP foamed samples.

关 键 词：聚丙烯 聚二甲基硅氧烷 发泡 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]