反应挤出聚乙烯热收缩管的研制  

The Development of Heat-shrinkable Polyethylene Tube by Reactive Extrusion

作　　者：龙文保[1] 吴大鸣[1] 刘颖[1] 徐绍宏[1] 

机构地区：[1]北京化工大学塑料机械及塑料工程研究所

出　　处：《北京化工大学学报（自然科学版）》1996年第1期41-45,67,共6页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：化工部"八五"重点科技项目

摘　　要：反应挤出是制造硅烷交联聚乙烯热收缩管的新技术．在１９０～２３０℃下反应挤出成型可交联聚乙烯管材，管材在沸水中８～１２ｈ完成交联反应．扩管器型腔排气良好，扩管温度均匀，扩胀管须快速冷却定型．The satisfactory performance heat-shrinkable polyethylene tube is due to itscrystalline, orientation and crosslinking structure. High molecular weight LDPE is themain resin for making the heat-shrinkable tube. Initiator has an important effect on thegraft reaction of silicone. Reactive extrusion is a new technique or making heat-shrinkablesilicone crosslinking polyethylene tube. The extrusion is performed under the temperatureof 190～230℃. The condensation polymerization and crosslinking arc carried out by soaking the tube in boiling water for 8～2 h. The expander exhausts satisfactorily, the quickexpanding and fast cooling are necessary.

关 键 词：反应挤出 热收缩管 接枝反应 聚乙烯 管材 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]