中国塑料 ›› 2013, Vol. 27 ›› Issue (04): 62-66.DOI: 10.19491/j.issn.1001-9278.2013.04.013

• 加工与应用 • 上一篇    下一篇

EVA对农膜再生料的力学性能及流变性能的影响

赵雪艳1,罗学刚2,林晓艳1   

  1. 1. 西南科技大学材料科学与工程学院;生物质材料教育部工程研究中心
    2. 西南科技大学生物质材料教育部工程研究中心
  • 收稿日期:2013-01-25 修回日期:2013-03-24 出版日期:2013-04-26 发布日期:2013-04-26
  • 基金资助:
    国家“十一五”科技支撑计划 (2007BAE42B04)

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

  • Received:2013-01-25 Revised:2013-03-24 Online:2013-04-26 Published:2013-04-26

摘要: 用熔融共混法制备了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(LDPE)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,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%时,改性材料的断裂伸长率和拉伸强度都和新料相当。EVA可以提高再生料的相容性,改善其流变性能和加工性能,使再生料的流变行为接近新料,更容易加工。

Abstract: Blends of recycled agriculture films (RPE) and Ethylene-vinyl acetate (EVA) were prepared by the twin-screw extruder at different ratios and pelletized. RPE served for matrix in this work. Virgin low density polyethylene (LDPE) was used as a contrast. The blends were blowed into thin films by single-screw extrusion. Mechanical and rheological properties of the blends were carefully evaluated and compared with virgin LDPE. The results show the tensile properties of the blends changed a little and elongation at break increased dramaticlly with the addition of EVA. The elongation at break and tensile properties of films made by RPE/EVA(50/50) blend was similar to virgin LDPE. The rheological properties of RPE have improved. The blends show potential applications in good performance products.

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