PE-LD/PE-HD/CSW的共混改性及发泡性能研究  

Compounding modification and foaming performance of PE-LD/PE-HD/CSW composites

作　　者：徐杰 李广富 付栋梁 钟进福 XU Jie;LI Guangfu;FU Dongliang;ZHONG Jinfu(Zhejiang Runyang New Material Technology Co,Ltd,Huzhou 313105,China)

机构地区：[1]浙江润阳新材料科技股份有限公司,浙江湖州313105

出　　处：《中国塑料》2023年第6期31-36,共6页China Plastics

摘　　要：以低密度聚乙烯(PE-LD)和高密度聚乙烯(PE-HD)为基体树脂,硫酸钙晶须(CSW)为增强剂,偶氮二甲酰胺(ADC)为发泡剂,采用辐照交联技术制备出PE-LD/PE-HD/CSW复合发泡材料。研究了不同CSW含量对PE-LD/PE-HD/CSW共混体系的熔体流动速率、热性能及发泡行为、力学性能、导热性能和热稳定性能的影响。结果表明,CSW的加入使PE-LD/PE-HD/CSW共混体系的熔体流动速率有所降低,热稳定性有所提高;与纯PE-LD/PE-HD发泡材料相比,当CSW含量为8%时,PE-LD/PE-HD/CSW复合发泡材料的拉伸强度提高21.3%,压缩强度提高17.8%,压缩模量提高31.3%,硬度提高10.9%、撕裂强度提高16.4%,而导热系数降低15.5%。A type of composite foams was fabricated by using low-density polyethylene(PE-LD)and high-density polyethylene(PE-HD)as matrix resins,calcium sulfate whisk(CSW)as a reinforcing agent,and azodicarbonamide as a foaming agent.The effect of CSW content on the melt flow rate,thermal properties,foaming behavior,mechanical properties,thermal conductivity,and thermal stability of the PE-LD/PE-HD/CSW blends were investigated.The results indicated that the introduction of CSW reduced the melt flow rate of the blends but improved their thermal stability.Compared to pure PE-LD/PE-HD complex foam,the PE-LD/PE-HD/CSW complex foams obtained better comprehensive properties at a CSW content of 8 wt%.Under such a CSW loading,the complex foams achieved an increase in tensile strength by 21.3%,in compression strength by 17.8%,in compression modulus by 31.3%,in hardness by 10.9%,and in tear strength by 16.4%,but a decrease in thermal conductivity by 15.5%.

关 键 词：聚乙烯 硫酸钙晶须 力学性能 热稳定性 发泡行为 

分 类 号：TQ325.5[化学工程—合成树脂塑料工业]