聚丙烯共混体系制备及其发泡性能研究  

Preparation and Foaming Properties of Polypropylene Blending System

作　　者：张玉良 李荣勋[1] 孙立水[1] 杨镇源 杨有财[1] 梁坤 Zhang Yuliang;Li Rongxun;Sun Lishui;Yang Zhenyuan;Yang Youcai;Liang Kun(Engineering Research Center of High Performance Polymer and Molding Technology,Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China;Qingdao New Material Technology Industrial Park Development Co.,Ltd.,Qingdao 266042,China)

机构地区：[1]青岛科技大学高性能聚合物及成型技术教育部工程研究中心,山东青岛266042 [2]青岛新材料科技工业园发展有限公司,山东青岛266042

出　　处：《塑料科技》2019年第9期10-14,共5页Plastics Science and Technology

摘　　要：以低熔点聚丙烯(LPP)与高熔点聚丙烯(HPP)的共混物为原料,CO2作为发泡剂,使用自制高压反应釜进行发泡。采用差示扫描量热仪和旋转流变仪剖析共混物的热行为与流变行为,通过扫描电子显微镜分析发泡后的泡孔形态。结果表明:HPP的加入使共混物的熔融温度与结晶温度向高温方向移动,HPP作为物理交联点,可显著提高共混物的熔体强度,减少泡孔合并与坍塌,提高泡孔密度,泡孔直径明显减小。Using low melting point polypropylene(LPP)and high melting point polypropylene(HPP)blends as raw materials,CO2 as foaming agent,self-made autoclave was used for foaming.The thermal and rheological behavior of the blends were analyzed by DSC and rheometer,and the foam morphology was analyzed by scanning electron microscopy.The results show that the melting temperature and crystallization temperature of the blends move towards high temperature with the addition of HPP.As a physical crosslinking point,HPP can significantly improve the melt strength of the blends,reduce the coalescence and collapse of bubbles,increase the density of bubbles and decrease the diameter of bubbles.

关 键 词：聚丙烯 共混 熔体强度 发泡 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]