中国塑料

中国塑料 ›› 2008, Vol. 22 ›› Issue (09): 74-77 .DOI: 10.19491/j.issn.1001-9278.2008.09.016

• 加工与应用 • 上一篇    

聚乙烯醇的热氧老化与稳定性研究

王建超;项爱民;刘小建   

  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:2008-09-26 发布日期:2008-09-26

Research on thermal oxidative aging and stability of Polyvinyl Alcohol

WANG Jian-chao;XIANG Ai-min;LIU xiao-jian   

  1. Department of Material Science and Engineering, Beijing Technology and Business University
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-09-26 Published:2008-09-26
  • Contact: WANG Jian-chao

摘要： 研究了聚乙烯醇（PVA）热氧环境下老化所发生的化学反应，以及磷酸酯类和酚类复合稳定剂对PVA热稳定性能的影响。傅里叶红外光谱、x射线光电子能谱分析结果表明：受热后PVA分子链上的羟基在高温下发生了消除反应，分子链上生成了C＝C共轭双键。HAAKE塑化仪、黄度指数及力学性能研究表明：复合稳定剂的加入可以有效抑制PVA在加工过程中产生的共轭双键；减缓体系在热塑化过程中扭矩的上升速率；减少PVA热加工过程中黄度增加速率；同时使PVA力学性能得到改善。

关键词: 聚乙烯醇, 热氧老化, 复合热稳定剂

Abstract: The aging of PVA on heating in the presence of oxygen were investigated. The conjugated double bounds were observed by FTIR&XPS, which confirmed the elimination reaction of hydroxyl groups from poly (vinyl alcohol) at high temperature. By introduction of composite stabilizers of phosphates and phenols into PVA, the elimination of hydroxyl groups was effectively inhibited, which was evidenced by the decrease torque of PVA melt and yellow index.

Key words: Polyvinyl Alcohol, Thermal oxidative aging, Composite stabilizers

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