纳米二氧化硅/POE协同增韧聚对苯二甲酸乙二醇酯及其发泡行为研究  

Study on Synergistic Effect and Foaming Behavior of PET Toughened with Nano-SiO_2/POE

作　　者：王文博[1] 王亚桥 余克松 王向东[1] WANG Wenbo;WANG Yaqiao;YU Kesong;WANG Xiangdong(School of Materials and Mechanical Engineering,Beijing Technology and Business University,Beijing 100048,China)

机构地区：[1]北京工商大学材料与机械工程学院,北京100048

出　　处：《中国塑料》2018年第5期28-33,共6页China Plastics

基　　金：国家重点研究与发展计划(2016YFB0302203;2016YFB0302205);中国科学技术部(2013EG111219);2017商科特色项目(19005757053)

摘　　要：通过熔融共混两步法制备了聚对苯二甲酸乙二醇酯(PET)/乙烯-辛烯共聚物(POE)/纳米二氧化硅复合材料,并以超临界二氧化碳为发泡剂,采用釜压法制备了PET发泡材料。研究了纳米二氧化硅和POE对PET韧性和发泡行为的影响。结果表明,纳米二氧化硅和POE显示出协同增韧PET效应,当纳米二氧化硅含量为0.3份时,冲击强度从11.63kJ/m^2增至29.15kJ/m^2,增幅达到150%;三元共混体系的储能模量(G′)和复数黏度(η~*)随着纳米二氧化硅含量的增加而逐渐减低;随着纳米二氧化硅从零增加到1.0份(质量份,下同),PET发泡材料的泡孔尺寸从75.39μm逐步减低至50.49μm,泡孔密度从6.67×107个/cm^3增加到了9.61×10~7个/cm^3,纳米二氧化硅表现出异相成核作用。Poly（ethylene terephthalate）（PET）/poly（ethylene-1-octene）（POE）/nano-SiO2 composites were prepared by a two-step melt blending process and then was foamed by a batch method with supercritical carbon dioxide as a foaming agent.The effects of nano-SiO2 and POE on the toughness and foaming behaviors of composites were investigated.The results indicated that the impact resistance of composites was enhanced significantly with the addition of nano-SiO2,and the impact strength increased by 150 % from 11.63 kJ/m^2 to 29.15 kJ/m^2 when 0.3 phr of nanoSiO2 was introduced.There is a synergistic toughening effect observed between Nano-SiO2 and POE.The storage modulus and complex viscosity of composites were found to decrease with an increase of nano-SiO2 content.Moreover,the cell size of composite foams was reduced from 75.39 to 50.49μm with an increase of nano-SiO2 content from 0 to 1.0 phr,but their cell density increased from 6.67×10^7 to 9.61×10^7 cells/cm^3 due to the heterogeneous nucleation effect of nano-SiO2.

关 键 词：聚对苯二甲酸乙二醇酯 纳米二氧化硅 乙烯-辛烯共聚物 增韧 发泡 异相成核 

分 类 号：TQ328[化学工程—合成树脂塑料工业]