聚丙烯釜压珠粒发泡技术研究  

Research on the Bead Foaming Technology of Polypropylene

作　　者：封水彬 刘涛[2] FENG Shuibin;LIU Tao(Research Institute of Maoming Branch Co.,SINOPEC,Maoming 525011,China;School of Chemical Engineering,East China University of Science and Technology,Shanghai 200000,China)

机构地区：[1]中国石油化工股份有限公司茂名分公司研究院,广东茂名525011 [2]华东理工大学化工学院,上海200000

出　　处：《塑料工业》2024年第5期52-55,71,共5页China Plastics Industry

摘　　要：以聚丙烯(PP)树脂为发泡原料,二氧化碳(CO_(2))为发泡剂,水为分散及导热剂,在高压反应釜中探索了PP釜压珠粒发泡的制备工艺,研究了发泡压力、发泡温度对PP发泡行为的影响,得到了制备不同倍率PP发泡珠粒的工艺条件。研究发现,在一定的温度范围内,PP珠粒发泡倍率随温度升高而增大,但过高的温度会导致发泡珠粒发生粘接。发泡压力的上升同样可以提高珠粒的发泡倍率,且泡孔的成核密度增大,泡孔尺寸减小。With polypropylene resin as the foaming raw material,carbon dioxide(CO_(2))as the foaming agent,water as the dispersion and heat conduction agent,the preparation process of polypropylene foam beads was explored in a high-pressure reactor.The effects of foaming pressure and foaming temperature on the foaming behaviors of polypropylene were studied,and the process conditions for preparing polypropylene foam beads with different foaming ratios were obtained.The results show that in a certain temperature range,the foaming ratio of polypropylene beads increases with the increase of temperature,but the excessive temperature leads to the adhesion of foam beads.The increase of foaming pressure can also increase the foaming ratio of beads,increase the nucleation density of cells,and decrease the cell size.

关 键 词：聚丙烯 发泡 发泡压力 发泡温度 二氧化碳 泡孔 

分 类 号：TQ325.1+4[化学工程—合成树脂塑料工业]