口模压力对微发泡PVC板材泡孔结构及力学性能的影响  

Effect of Die Pressure on Cell Structure and Mechanical Properties of Microcellular Foamed PVC Sheet

作　　者：王明义[1] 纪莲清[2] 胡军 周南桥[3] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]郑州轻工业学院机电工程学院,河南郑州450002 [3]华南理工大学聚合物成型加工工程教育部重点实验室华南理工大学聚合物新型成型装备国家工程研究中心,广东广州510640

出　　处：《广东化工》2015年第24期10-11,24,共3页Guangdong Chemical Industry

基　　金：国家自然科学基金:21206152

摘　　要：以超临界CO_2为发泡剂,使用单螺杆挤出发泡机制备了微发泡PVC发泡板材。研究了口模压力对微发泡PVC板材泡孔结构、力学性能及制品密度的影响。研究发现:增加口模压力有利于增加泡孔密度,提高PVC发泡板材的力学性能,而发泡制品密度则随压力的升高先降低后增加。Using supercritical CO2 as the foaming agent, rigid polyvinyl chloride（R-PVC） foam sheets were produced in a continuous extrusion foaming system. The effects of die pressure on microstructure, mechanical properties and density of micro foamed PVC sheet were investigated. The results showed that the increase of die pressure resulted in increased cell-population density and mechanical properties enhancement of the foamed PVC sheet, while the density of foamed PVC sheet first decreased and then increased with the increase of die pressure.

关 键 词：聚氯乙烯 挤出发泡 超临界二氧化碳 

分 类 号：TQ[化学工程]