中国塑料 ›› 2011, Vol. 25 ›› Issue (05): 46-50 .DOI: 10.19491/j.issn.1001-9278.2011.05.010

• 材料与性能 • 上一篇    下一篇

木塑复合材料的热氧化规律研究

蔡培鑫 吕群 张清锋 羊海棠 梁梦杰   

  1. 杭州师范大学 杭州师范大学 杭州师范大学
  • 收稿日期:2011-01-24 修回日期:1900-01-01 出版日期:2011-05-26 发布日期:2011-05-26

Study on the Thermal Oxidation of Wood-plastic Composites

ZHANG Qingfeng   

  • Received:2011-01-24 Revised:1900-01-01 Online:2011-05-26 Published:2011-05-26

摘要: 以聚丙烯(PP)和木粉为主要原料制备了木塑复合材料(WPC),用差示扫描量热法(DSC)和热重分析(TG)研究了WPC及其主要原料PP、木粉的热氧化曲线特征,并研究了木粉、抗氧剂对WPC氧化诱导时间的影响。结果表明,在含有抗氧剂1010的条件下,PP和WPC都不会被显著氧化,而当抗氧剂1010消耗完毕后(氧化诱导时间之后),PP和WPC都会发生明显热氧化而使DSC曲线上出现放热峰,同时使TG曲线上出现快速热失重;抗氧剂对提高木粉的热稳定性没有显著效果;在WPC中加入抗氧剂硫代二丙酸二月桂酯(DLTP)对提高WPC的热稳定性具有显著效果。

关键词: 氧化诱导时间, 抗氧剂, 聚丙烯, 木塑复合材料, 木粉, 热氧化性能

Abstract: Wood-plastic composites(WPC) were prepared from polypropylene(PP)and wood flour. Thermal properties and oxidation induction time (OIT) of the WPC, PP, and wood flour were studied using differential scanning calorimetry (DSC) and thermogravimetric (TG). The effects of wood flour and antioxidant on OIT of WPC were investigated. No significant oxidation was observed in PP or WPC containing antioxidant 1010. An exothermic peak in DSC curve and a rapid weight loss on TG curve were found after exhausting antioxidant 1010 (after OIT), which means an obvious thermal oxidation decomposition of PP or WPC. The antioxidant had little effect on the thermal stability of wood flour. The thermal stability of WPC was improved obviously by adding antioxidant dilauryl thiodipropionate (DLTP).

Key words: oxidation induction time, antioxidant, polypropylene, wood-plastic composites, wood flour, thermal oxidation