EVA对农膜再生料的力学性能及流变性能的影响  

Influence of EVA on the Mechanical and Rheological Properties of Recycled Agriculture Films

作　　者：赵雪艳 罗学刚[1] 林晓艳[1] 

机构地区：[1]生物质材料教育部工程研究中心,西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《中国塑料》2013年第4期62-66,共5页China Plastics

基　　金：国家"十一五"科技支撑计划(2007BAE42B04)

摘　　要：用熔融共混法制备了乙烯醋酸乙烯酯(EVA)与农膜再生料(RPE)的共混材料,研究了EVA对农膜再生料的改性作用,并与新料低密度聚乙烯(PE-LD)进行了对比研究。对再生料、改性材料和新料进行了力学性能分析、旋转流变分析、转矩流变分析和形貌分析。结果表明,当EVA可以显著提高农膜再生料的断裂伸长率,对拉伸强度影响不大,当EVA用量为50%(质量分数,下同)时,改性材料的断裂伸长率与拉伸强度和新料相当。EVA含量为10%时,再生料与EVA的相容性最好。流变分析表明,EVA可以改善农膜再生料的流变性能和加工性能,使再生料的流变行为接近新料,更易于加工。Blends of recycled agriculture films （RPE） and ethylene-vinyl acetate （EVA） were prepared and pelletized using a twin-screw extruder. The blend pellets were blown into thin films via single-screw extrusion. Mechanical and theological properties of the blends were evaluated and compared with virgin PE-LD. The results showed that the tensile properties of the blends changed a little and elongation at break increased dramatically with the addition of EVA. The elongation at break and tensile properties of the films made by RPE/EVA（50/50） blend was similar to virgin PE-LD. The theological property of RPE was improved.

关 键 词：农膜再生料 乙烯醋酸乙烯酯 力学性能 流变性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]