高密度聚乙烯/木粉复合材料的热氧老化(Ⅰ)——增容剂及抗氧剂对复合材料耐热氧老化的效果对比

材料导报, 2009, 23(2): 102-105.

高密度聚乙烯/木粉复合材料的热氧老化(Ⅰ)——增容剂及抗氧剂对复合材料耐热氧老化的效果对比

雷文 ^1, , 余旺旺 ^2, , 骆嘉言 ^3, , 上官国锦 ^4, , 徐逸 ^5,

1.南京林业大学理学院,南京,210037

2.南京林业大学理学院,南京,210037

3.南京林业大学木材工业学院,南京,210037

4.南京林业大学理学院,南京,210037

5.南京林业大学木材工业学院,南京,210037

基金项目: 江苏省大学生科技创新项目(苏教高[2007]17号) 江苏省高校自然科学研究项目(06KJD220083)

关键词：木塑复合材料 , 热氧老化 , 界面增容剂 , 抗氧剂

Thermo-oxidative Aging of High Density Polyethylene/Wood Flour Composites(Ⅰ)——Comparative Study on the Effect of Compatibilizing Agent and Antioxidants on the Thermo-oxidative Aging of the Composites

采用高密度聚乙烯、木粉为原料,采用模压工艺制备木塑复合材料,通过力学性能及热性能的研究,对比分析了界面增容剂马来酸酐接枝聚乙烯(MAPE)及不同抗氧剂对木塑复合材料耐热氧老化性能的影响.结果表明,未老化前,使用25%的MAPE可使木塑复合材料的拉伸强度、弯曲强度及冲击强度分别提高68.65%、29.60%和67.53%,所用的3种抗氧剂同样都可提高复合材料的弯曲强度及冲击强度,但均将降低复合材料的拉伸强度.热氧老化600h后,MAPE改性的木塑复合材料具有最高的强度值,耐老化效果优于使用抗氧剂的木塑复合材料,更明显优于未改性的木塑复合材料.使用MAPE及抗氧剂均可提高老化后复合材料的热稳定性,但MAPE增容将提高木塑复合材料的起始熔融温度,而抗氧剂却将降低复合材料的起始熔融温度.

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