中国塑料 ›› 2008, Vol. 22 ›› Issue (10): 42-45 .DOI: 10.19491/j.issn.1001-9278.2008.10.009

• 材料与性能 • 上一篇    下一篇

反应挤出熔融接枝改性淀粉/PE-LD发泡材料的制备及性能研究

王佩璋,刘学   

  1. 北京工商大学材料科学与工程系
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-10-25 发布日期:2008-10-25

Preparation and Performance of Starch/PE-LD Compounds Modified by Grafting in Melting State

WANG Pei-zhang, LIU Xue   

  1. Department of Materials Science and Engineering,Beijing Technology and Business University
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-10-25 Published:2008-10-25
  • Contact: WANG Pei-zhang

摘要: 将热塑性淀粉分别与6种小分子单体及引发剂熔融挤出制备接枝改性淀粉。红外光谱和接枝率的研究表明,采用熔融挤出接枝的方法可以使小分子单体与淀粉发生接枝反应,丙烯酸与淀粉的接枝率最高为2.4 %;采用XRD、哈克流变仪和偏光显微镜等分析了熔融接枝改性淀粉/低密度聚乙烯(PE-LD)共混物的结晶性、流动性和发泡性能。结果表明,接枝改性增加了淀粉和PE-LD的相容性,使淀粉基发泡材料的密度降低、泡孔均匀度提高,其中用丙烯酸接枝的淀粉/PE-LD发泡材料的各项性能均较好,丙烯酸的最佳用量为3份。

关键词: 淀粉基, 低密度聚乙烯, 熔融接枝, 发泡

Abstract: The thermoplastic starch was grafted with 6 different monomers in melt state during extrusion. The results of IR and grafting ratio shows that the highest grafting ratio was starch-g-acrylic acid, the grafting ratio was obtained at 2.4 %. IR, XRD, Haake torque rheometer and polarizing microscope were used to investigate the influence of crystal behavior, rheological property and cells configuration of grafted starch/PE-LD. Results indicate that the grafted starch improved compatibility of starch/PE-LD compounds. Starch-g-acrylic acid/PE-LD compound showed the best properties. The dose of acrylic acid was 3 phr.

Key words: starch-based, low density polyethylene, melt grafting, foaming