EVOH/纳米SiO_2复合材料的加工流变性能及应用  

Processing Rheological Property and Application of EVOH/SiO_2 Nanocomposites

作　　者：刘跃军[1] 刘亦武[1] 魏珊珊[1] 

机构地区：[1]湖南工业大学包装新材料与技术重点实验室,湖南株洲412007

出　　处：《高分子材料科学与工程》2011年第5期124-128,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(10672197;10972076);湖南省杰出青年基金(07JJ1001);湖南省科技计划项目(2009GK3127);湖南工业大学研究生创新基金(CX0903)

摘　　要：采用高级毛细管流变仪,分别测定乙烯-乙烯醇共聚物(EVOH)及EVOH/纳米SiO2复合材料的流变性能,研究了不同温度、不同纳米SiO2含量对复合材料加工性能的影响。以上述流变性能测试为参考,改变加工工艺,采用熔融共混法制备EVOH/纳米SiO2复合材料并吹塑成膜,测试薄膜的性能。结果表明,随着纳米SiO2用量的增加,复合材料的熔融流动性有较大的下降,可加工的温度范围越来越窄,可添加纳米SiO2的最大量约为5%;当纳米SiO2质量分数大于3%时,复合材料的熔体流变性受温度影响较小;不同加工工艺对所制备的EVOH膜及EVOH/纳米SiO2复合膜性能有较大影响。The influence of different temperature and contents of nano-SiO2 on the rheological behavior of the composites was researched through measuring the rheological behavior of the ethylene-vinyl alcohol copolymer（EVOH） and the EVOH/nano-SiO2 composites by advanced capillary rheometer.Using rheological properties of composites as a reference,changing processing technology,EVOH/SiO2 nano-composites were prepared by melt blending and blown to film,after that,we tested the performance of the films.The results show that： with the increase of the amount of nano-SiO2,the melt flow properties of the composite have a great decline and the processing temperature range becomes more and more narrow.The maximum amount of nano-SiO2 is about 5%.When the mass fraction of nano-SiO2 is greater than 3%,the melt flow properties of the composite is less affected by temperature.Different processing technologies have a certain impact on the performance of EVOH and EVOH/nano-SiO2 composite.

关 键 词：乙烯-乙烯醇共聚物 纳米SIO2 流变性能 加工工艺 

分 类 号：TB383[一般工业技术—材料科学与工程]