| 端羟基聚丁二烯/聚醚型聚氨酯弹体的合成及性能 |
| Synthesis and Properties of HTPB/PTHF Polyurethane Elastomers |
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| DOI： |
| 中文关键词: 端羟基聚丁二烯 聚四氢呋喃 聚氨酯弹性体 N N-二（2-羟丙基）苯胺 力学性能 |
| 英文关键词: hydroxy-terminated polybutadiene polytetrahydrofuran polyurethane elastomer N N-di（2-hydroxy propyl）aniline |
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| 中文摘要: |
| 研究端羟基聚丁二烯/聚醚型聚氨酯弹性体的配方。探讨游离——NCO含量、以N，N-二（2-羟丙基）苯胺（Isonol C-100）为扩链剂时，扩链系数以及端羟基聚丁二烯/聚四氢呋喃并用比等对弹性体力学性能的影响。试验结果表明，游离——NCO含量为8.5%，扩链系数为0.89时，弹性体的综合性能优良；端羟基聚丁二烯/聚四氢呋喃并用比减小时，能改善弹性体的拉伸强度和撕裂强度。电子显微镜观察证明弹性体中呈现明显的软段相区和硬段相区。 |
| 英文摘要: |
| The formula of hydroxy-terminated polybutadiene（HTPB）/polytetrahy-drofuran（PTHF）polyurethane elastomers was studied.The influence of the free ——NCO content，the chain extend coefficient with N，N-di（2-hydroxy propyl） aniline chain extender，and the ratio of HTPB/PTHF on the physical properties of elastomers was investigated.The test results showed that the good balanced properties of elastomers were obtained when the free ——NCO content was 8.5% and the chain extend coefficient was 0.89；the improved tensile strength and tear strength of elastomers were obtained as the ratio of HTPB/PTHF decreased.It was showed by electron microscope that the remarkable soft blocks and hard blocks existed in the elastomers. |
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