Elvaloy对PVC性能影响研究  

Effect of Elvaloy on Properties of PVC

作　　者：李熙然[1] 丁雪佳[1] 何金迎[1] 王林生[1] 苏磊静[1] 雷晓慧[1] 

机构地区：[1]北京化工大学北京市新型高分子材料制备与加工重点实验室,北京100029

出　　处：《中国塑料》2012年第12期25-28,共4页China Plastics

基　　金：国家科技支撑计划(新增塑剂的生物医用材料)(2012BAI22B07)

摘　　要：采用双辊混炼机将乙烯-醋酸乙烯酯-一氧化碳三元共聚物(Elvaloy)与经改性的聚氯乙烯(PVC)熔融共混,制备了PVC/Elvaloy共混物,考察了不同含量Elvaloy对PVC的透明性、低温性能、微观形态结构、力学性能及塑化温度等的影响。结果表明,共混物的透光率在76%以上,雾度低于21%,具有良好的透明性;Elvaloy可使PVC的低温冲击强度提高2倍,断裂伸长率提高,脆性温度降低10℃,塑化温度降低20℃以上;当Elvaloy添加量为20份时,PVC/Elvaloy共混物显示出1个玻璃化转变温度,相容性良好,且随着Elvaloy含量的增加,玻璃化转变温度呈下降趋势。Blends of ethylene-vinyl acetate-carbon monoxide terpolymer （Elvaloy）/modified poly （vinyl chloride） （PVC） were prepared in a two-roll mixer via melt blending. The effects of content of Elvaloy on transparency, cold resistance, micro-morphological structure, mechanical properties, and plasticizing temperature were studied. It showed that the transmittance of PVC/Elvaloy blends was above 76 %, and the haze was lower than 21 %. Because of the addition of Elvaloy, the lowtemperature impact strength of PVC increased twice as much, elongation at break increased, and brittleness temperature and plasticizing temperature decreased more than 20℃and 10 ℃, respectively. When the contents of Elvaloy were 2, Elvaloy/PVC blends exhibited only one Tg, indicating the components were compatible. With increasing contents of Elvaloy, Tg of the blends decreased.

关 键 词：乙烯-醋酸乙烯酯-一氧化碳三元共聚物 聚氯乙烯 共混物 耐寒 塑化温度 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]