聚丙烯接枝马来酸酐增容聚酰胺6/聚丙烯体系吸湿性能及力学性能的研究  

Mechanical Properties and Moisture Absorption of Polyamide 6/Polypropylene Blends Compatibilized with Maleic Anhydride Grafted Polypropylene

作　　者：孟永新[1] 张哲国[2] 李景庆[2] 田晓明[2] 

机构地区：[1]天津市塑料研究所,天津300110 [2]天津大学材料科学与工程学院高分子材料系,天津300072

出　　处：《中国塑料》2004年第11期49-53,共5页China Plastics

基　　金：天津市自然科学基金资助项目 (0 2 3 60 4611)

摘　　要：以聚丙烯接枝马来酸酐 (PP- g- MAH)为相容剂 ,利用其与聚酰胺 6(PA6)在共混过程中的反应增容作用 ,实现了与聚丙烯 (PP)之间的相容性共混 ,改变其用量 ,制备了系列具有不同组成的PA6/PP合金 ,研究了不同组成合金材料的吸湿性能及其在干态和充分吸湿状态时的冲击强度和拉伸性能。结果表明 ,向PA6/PP合金体系中加入相容剂PP g MAH后 ,可以改善合金的相界面 ,形成相容性的合金结构 ,明显降低合金材料的吸湿量及吸湿速率 ,但进一步增大相容剂PP- g- MAH的用量时 ,只能明显降低合金材料吸湿过程初期的吸湿速率 ,不能进一步显著降低合金材料的吸湿量。在相容剂PP- g -MAH用量一定时 ,随着PA6/PP合金体系中PA6组分含量的提高 ,合金在干、湿态条件下的冲击强度、拉伸强度、断裂伸长率均呈近似线性变化。对于具有相同基本组成的合金 ,随着相容剂PP g MAH用量的增加 ,材料在干、湿态条件下的拉伸强度均有提高 ,杨氏模量则在干态时有所提高 ,在湿态时影响不显著 ,在干、湿态时断裂伸长率以及冲击强度均没有产生显著影响。Polyamide 6/polypropylene (PA6/PP) blends were prepa re d using maleic anhydride grafted polypropylene (MAH-g-PP) as a compatibilizer. The moisture absorption and the mechanical properties in both dry and wet (satur ated with moisture) states were investigated. It was found that the introduction of MAH-g-PP decreased both the rate and degree of moisture absorption of the b lends. At high contents of MAH-g-PP, only the initial rate of moisture absorpt i on was lowered, however, the ultimate degree of moisture absorption was not furt her decreased. With increasing MAH-g-PP contents, the tensile strengths in bot h dry and wet states and the Young's modulus in dry state increased, while the Young's modulus in wet state, the elongation at break and the impact str engths in both states remained unaffected. As the PA6 fraction in the blends increased, th e impact and tensile strengths and the elongation at break changed nearly linear ly.

关 键 词：聚酰胺6 聚丙烯 合金 聚丙烯接枝马来酸酐 反应增容 吸湿性能 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]