Polyurethane ionomers. I. Structure–properties relationships of polyurethane ionomers
Polyurethane ionomers. I. Structure–properties relationships of polyurethane ionomers
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聚氨酯离聚物 I. 聚氨酯离聚物的结构-性能关系
DOI：
10.1002/app.1984.070290804
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发表时间：
1984
影响因子：
3
通讯作者：
K. Frisch
中科院分区：
文献类型：
--
作者：
S. Hsu;H. Xiao;H. Szmant;K. Frisch
研究了化学结构对聚氨酯离聚物（PU 离聚物）机械性能的影响。主要由 4,4-亚甲基双（异氰酸苯酯）（MDI）和聚（氧四亚甲基）二醇（PTMO）制备的 NCO 封端预聚物用含叔胺的二醇进行扩链，并通过预聚物季铵化获得离聚物。 N-甲基二乙醇胺扩链剂具有最好的物理性能。随着 PTMO 链长的减小和季铵中心浓度（或 PU 预聚物的 NCO/OH 比）的增加，PU 离聚物的机械性能得到改善。季铵化程度较低会导致所得聚氨酯离聚物的机械性能下降，但季铵化后可以改善其性能。随着季铵化中心浓度的增加，PU 离聚物对铝的粘附力和玻璃化转变温度也随之增加。
The influence of chemical structure on mechanical properties of polyurethane ionomers (PU ionomers) has been examined. NCO-terminated prepolymers prepared from primarily 4,4-methylene bis(phenyl isocyanate) (MDI) and poly(oxytetramethylene) glycol (PTMO) were chain extended with tertiary amine-containing diols and the ionomers obtained by quaternization of the prepolymers. The N-methyldiethanolamine chain extender gave the best physical properties. The mechanical properties of the PU ionomers were improved with decreasing chain length of PTMO and with increasing concentration of quaternary ammonium centers (or NCO/OH ratio of PU prepolymers). A lower degree of quaternization resulted in a decrease in the mechanical properties of the resulting PU ionomers, but their properties could be improved by post-quaternization. The adhesion of the PU ionomers to aluminum and the glass transition temperature increased with increasing concentration of quaternizing centers.