木塑复合材料的热氧化规律研究  

Study on Thermal Oxidation of Wood-plastic Composites

作　　者：蔡培鑫[1] 吕群[1] 张清锋[1] 羊海棠[1] 梁梦杰[1] 

机构地区：[1]杭州师范大学材料与化学化工学院,浙江杭州310036

出　　处：《中国塑料》2011年第5期46-50,共5页China Plastics

基　　金：浙江省重大科技专项(优先主题)(2008C13G2150004);杭州市科技发展计划(20090231T08)

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。Wood-plastic composites （WPC） were prepared from polypropylene（PP）and wood flour. Thermal properties and oxidation induction time 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 oxidation induction time 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 oxidation induction time）, 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）.

关 键 词：聚丙烯 木粉 木塑复合材料 热氧化性能 氧化诱导时间 抗氧剂 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]