PET-PA6嵌段共聚物的组成和结构研究  

Composition and structure of PET-PA6 block copolymer

作　　者：李雅芳[1] 王晓宁[1] 廖青[1] 

机构地区：[1]北京服装学院,北京100029

出　　处：《合成纤维工业》2013年第3期19-22,共4页China Synthetic Fiber Industry

基　　金：服装材料研究开发与评价北京市重点实验室(2010XK-07);国家科技支撑计划(2011BAE05B00-2011BAE05B04-12)

摘　　要：采用差示扫描量热(DSC)法、红外光谱(FTIR)法、元素分析法和核磁共振氢谱(1H-NMR)法对不同配比的PET-PA6嵌段共聚物的结构、组成和性能进行了分析。结果表明:PA6和PET反应后形成了相容性较好的共聚物而非共混物,分子链结构特征是以软段PA6封端的共聚物;共聚反应中加入的PA6质量分数为5%～20%时,随PA6投料比增加,共聚物的熔融温度、冷结晶温度、玻璃化转变温度均呈下降趋势;元素分析法和1H-NMR法测得PET-PA6嵌段共聚物的实际组成与投料比非常接近,实际生产中可通过合理控制投料比来制备所需材料。The structure, composition and properties of PET-PA6 block copolymer with different mass ratio were analyzed by differential scanning calorimetry （ DSC）, far infared spectrometry （ FTIR）, elemental analysis and hydrogen proton nuclear mag- netic resonance spectroscopy （＇H-NMR）. The results showed that PA6 and PET reacted and did not form a blend, but a copoly- mer with a good compatibility; the block copolymer was terminated with the soft segment of PA6; the melting temperature, cool crystallization temperature and glass transition temperature of the copolymer were all decreased while adding 5% - 20% PA6 by mass fraction during the copolymerization reaction. The elemental analysis and L H-NMR results showed that PET-PA6 block co- polymer had the actual composition close to the feed ratio, which indicated that the desired material can be produced by rationally controlling the feed ratio.

关 键 词：聚对苯二甲酸乙二醇酯 聚己内酰胺 嵌段共聚 硬段 软段 组成 结构 

分 类 号：O631.3[理学—高分子化学]