中国塑料 ›› 2008, Vol. 22 ›› Issue (12): 22-27 .DOI: 10.19491/j.issn.1001-9278.2008.12.005

• 材料与性能 • 上一篇    下一篇

PP/EVOH共混物结构与性能研究

栾福进;承民联;王世银   

  1. 江苏工业学院材料科学与工程学院,江苏 常州 213016
  • 收稿日期:2008-09-19 修回日期:1900-01-01 出版日期:2008-12-26 发布日期:2008-12-26

Structure and Properties of PP/EVOH Blends

LUAN Fu-jin;CHENG Min-lian;WANG Shi-yin   

  1. College of Material Science and Engineering, Jiangsu Polytechnic University, Changzhou 213016, China
  • Received:2008-09-19 Revised:1900-01-01 Online:2008-12-26 Published:2008-12-26
  • Contact: CHENG Min-lian

摘要: 采用丙烯酸接枝聚丙烯(PP-g-AA)、衣康酸接枝聚丙烯 (PP-g-ITA)、马来酸酐接枝聚丙烯 (PP-g-MAH)3种相容剂增容聚丙烯(PP)/乙烯-乙烯醇共聚物(EVOH)共混体系,研究了共混体系的相容性、热性能、力学性能和阻隔性能。红外光谱分析表明,相容性的改善源于相容剂与EVOH之间形成的酯键和氢键。扫描电镜显示,PP-g-AA、PP-g-ITA、PP-g-MAH的增容作用依次增强,共混体系中相容剂增容作用越强,分散相尺寸越小,界面结合越牢固。差示扫描量热分析发现,PP/EVOH增容共混体系中EVOH组分的结晶温度低于不含相容剂的共混体系EVOH组分的结晶温度,PP组分的结晶温度变化则相反。增容共混体系与不含相容剂的共混体系相比,拉伸强度提高了10 MPa,吸油率降幅达0.8 %。

关键词: 聚丙烯, 乙烯-乙烯醇共聚物, 共混, 结构, 性能

Abstract: The compatibility, thermal properties, mechanical properties and barrier properties of the blends of PP/poly (ethylene-co-vinyl alcohol) (EVOH) containing three kinds of compatilizers(PP-g-AA, PP-g-ITA and PP-g-MAH) were investigated. Infrared spectra analysis indicated that the improvement of compatibility was resulted from the formation of ester bonds and hydrogen bonds between compatilizers and EVOH. Scanning Electron Microscopy observations showed that the presemce of compatilizers in the PP/EVOH blends reduced the size of the dispersed phase. Differential scanning calorimetry analysis showed that the compatilizers lowered the crystallization temperature of dispersed EVOH phase, but increased that of PP phase. Compared with the uncompatibilized blends, the tensile strength of the compatibilized blends was increased by10 MPa, and the oil absorption rate was decreased by 0.8 %.

Key words: polypropylene, poly (ethylene-co-vinyl alcohol), blends, structure, property

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