PAG原位增容PP/PA6共混物的非等温结晶动力学  

Non-isothermal Crystallization Kinetics of Polypropylene/Polyamide 6 Blends In-situ Compatibilized with PAG

作　　者：梁淑君[1] 杨万泰[2] 

机构地区：[1]太原工业学院材料工程系,山西太原030008 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《中国塑料》2010年第3期34-40,共7页China Plastics

摘　　要：用差示扫描量热法研究了聚丙烯(PP)、聚酰胺6(PA6)以及用α-甲基苯乙烯(AMS)和甲基丙烯酸缩水甘油酯(GMA)的低相对分子质量共聚物(PAG)原位增容PP/PA6共混物的非等温结晶动力学,采用修正Avrami方程的Jeziorny法对所得数据进行了处理。结果表明,与对比样PP/PA6相比,加入增容剂PAG后,共混体系中PP和PA6两相的结晶峰温Tp和结晶热焓ΔH均有所降低,而半结晶时间t1/2则有所延长,表明PAG的加入使共混体系两相大分子链的活动性受到了阻碍,导致其结晶困难;在2.5～40.0℃/min的降温速率范围内,修正的Avrami模型能很好地描述PP、PA6、PP/PA6及PAG增容PP/PA6共混物的非等温结晶过程。The non-isothermal crystallization kinetics of PP, PA6, and PP/PA6 blends compatibilized with a copolymers （PAG） of α-methyl styrene （AMS） and glycidyl methacrylate （GMA） was studied by means of differential scanning calorimetry（DSC）. Jeziorny method was used to analyze the crystallization kinetics parameters. It showed that the peak crystallization temperatures and the crystallization heat enthalpies of both PP and PA6 in PP/PA6/PAG all decreased while the semicrystallization time increased. These results demonstrated that there have some chemical reactions occured when PAGs were added into the blends. Within the cooling rate of 2. 5 - 40 ℃/min, the amended Avrami model can well describe the non-isothermal crystallization process of PP, PA6, PP/PA6, and PP/PA6/PAG.

关 键 词：聚丙烯 聚酰胺6 增容 共混物 非等温结晶 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]