Characterization of polyurethane network elastomers
Characterization of polyurethane network elastomers
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聚氨酯网络弹性体的表征
DOI：
10.1002/apmc.1996.052400119
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
T. Yokoyama
中科院分区：
文献类型：
--
作者：
M. Furukawa;Masaru Komiya;T. Yokoyama
以聚己二酸乙二醇酯（PEA）、2，4-甲苯二异氰酸酯（TDI）和1，4-丁二醇（BD）为原料，合成了含有硬段低聚物的聚酯型聚氨酯网络弹性体。这些硬段低聚物是通过BD与TDI反应获得的羟基封端的低聚物（[BD-TDI]n-BD ; n= 1，3）。脲基甲酸酯作为交联位点的浓度通过胺降解法测定。硬段部分通过弹性体中的软段的新型选择性水解获得。用GPC测定了硬段的分子量分布。机械和热性能进行了测量。讨论了普通弹性体和含硬段低聚物弹性体之间的物理交联对橡胶弹性的影响。
Polyester urethane network elastomers with incorporated hard segment oligomers have been prepared by poly(ethylene adipate)glycol (PEA), 2,4-tolylene diisocyanate (TDI), and 1,4-butanediol (BD). These hard segment oligomers were hydroxy-terminated oligomers ([BD-TDI]n-BD ; n=1,3), obtained by reacting BD with TDI. Concentrations of allophanate as a cross-linking site were determined by the amine degradation method. Hard segment moieties were obtained by a novel selective hydrolysis of soft segments in the elastomers. Molecular weight distributions of hard segment were measured by means of GPC. Mechanical and thermal properties were measured. Dependence of rubber elasticity on physical cross-linking between normal elastomers and the elastomers with incorporated hard segment oligomers were discussed.