When blend modification of HTPB and PU are done, the apparent crosslinking density of PU matrix in - creases, and the tensile strength of propellant enhances.
将端羟基聚丁二烯与聚氨酯进行共混改性，提高了聚氨酯基体的表观交联度及推进剂的拉伸强度。
The study on high performance PU elastomers was introduced in this paper. The properties of all kinds of PU elastomers prepared by high molecular weight polyether, PPDI, NDI, HTPB was discussed.
本文介绍了高性能聚氨酯弹性体的研究概况，讨论了高分子质量聚醚、PPDI、NDI、HTPB等为主要原料制备的各种聚氨酯弹性体的性能。
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