热塑性聚氨酯/尼龙612共混体系的相互作用及结晶行为  

The Interaction and Crystallization of TPU/PA612 Compounds

作　　者：蔡力锋[1] 仝丹丹[2] 林志勇[2] 

机构地区：[1]莆田学院环境与生命科学学院,福建莆田351100 [2]华侨大学材料科学与工程学院,福建泉州362021

出　　处：《高分子材料科学与工程》2011年第3期79-82,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50673030);福建省自然科学基金资助项目(2009J05131)

摘　　要：采用溶液共沉淀法制备了热塑性聚氨酯(TPU)/尼龙(PA)612共混物,通过变温红外光谱仪和差示扫描量热仪(DSC)研究了共混体系中TPU与PA612分子间的相互作用及其对结晶行为的影响。DSC结果表明,随着共混体系中TPU含量的增加,PA612的结晶峰温度明显降低,结晶峰宽明显变宽;相对于纯TPU,共混体系中TPU的结晶峰温度及结晶峰宽呈现与上述PA612类似的变化。变温红外光谱结果表明,共混体系中PA612的NH与TPU的C=O、PA612的C=O与TPU的NH之间能够形成新的氢键作用,从而阻碍了PA612及TPU链段的规整排列,使其结晶行为发生变化。Thermoplastic polyurethane（TPU）/polyamide（PA）612 compounds were prepared by coprecipitation method.Temperature-dependant Fourier-transform infrared（FT-IR） spectrometry and differential scanning calorimetry（DSC） were used to investigate the interaction between PA612 and TPU,as well as its effects on the crystallization of PA612 and TPU.DSC results show that increase of TPU contents in the compounds leads to the decrease of crystallization peak temperature and the broadening of crystallization peak for PA612.Similar phenomena appears when the crystallization of TPU in compounds is considered in comparison with neat TPU.FT-IR results demonstrate that new hydrogen bonds are formed between PA612 and TPU,which block the regular packing of PA612 and TPU chains,and eventually influence the above crystallization behavior.

关 键 词：尼龙612 热塑性聚氨酯 氢键 热分析 变温红外光谱 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]