Abstract: The morphlolgical structure of highly plasticized polyethylene glycol polyurethane elastomer network was studied.Content of plasticizer nitrate ester was nearly 74%.The results showed that no crystalization and microphase segregation were found in the title elastomer network at room temperature.

Key words: Polyurethane propellant;Crystallization;Mechanical performance;Macrophase segregation +

摘要： 研究了高增塑聚乙二醇聚氨酯弹性体网络的形态结构，结果表明，由于极性增塑剂的存在，室温条件下，体系不存在结晶；常温条件下，不同增塑剂含量的聚乙二醇聚氨酯弹性体网络均不存在微相分离形态结构。

关键词: 聚氨酯推进剂;结晶;力学性能;微相分离