| 热塑性聚氨酯弹性体的合成及其性能表征 |
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| 引用本文： | 艾青松,常浩,方心灵,刘元坤,吴中伟,许冬梅.热塑性聚氨酯弹性体的合成及其性能表征[J].中国材料科技与设备,2014(6):11-14. |
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| 作者姓名： | 艾青松 常浩 方心灵 刘元坤 吴中伟 许冬梅 |
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| 作者单位： | 北京航天试验技术研究所,北京100074 |
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| 摘 要： | 聚氨酯具有优异的性能且应用广泛，本文由4，4’-二苯基甲烷二异氰酸酯（MDI）、相对分子质量为2000的聚四亚甲基醚二醇（盯MG）和1，4-丁二醇（BDO）通过两步法合成了一种热塑性聚氨酯弹性体，并实验测定其反应温度为80℃，预聚时间为1h。扩链时间为30h；其拉伸强度为25．6MPa，断裂伸长率为610％，邵A硬度为82，达到了拜耳样品的力学要求。合成样品有着优异的耐酸碱性、耐水解性和耐高低温性等。利用TG与DMA表征其使用温度，发现合成样品使用温度范围很宽，初始分解温度在300℃左右。
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| 关 键 词： | 聚氨酯 耐水解 性能 |
Synthesis and Property Characterization of Thermoplastic Polyurethane Elastomer |
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| Affiliation: | AI Qing-song , CHANG Hao , FANG Xin-ling , LIU Yuan-kun , WU Zhong -wei , XU Dong -mei (1. Beijing Institute of Aerospace Testing Technology, Beijing, 100074, China; 2. Rate New Technology Corporation, Beijing, 100074, China ) |
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| Abstract: | Polyurethane has excellent properties and wide application. In this article, a kind of thermoplastic polyurethane elastomer is synthesized by two--step method, through 4, 4＇- diphenyl methane diisocyanate （MDI）, the relative molecu- lar mass of 2000 polytetramethylene ether glycol （PTMG）, and 1, 4-butanediol （BDO） . The reaction temperature is 80℃, the pre-polymerization time is lh, chain extension time is 30h. The tensile strength of the sample is 25.6 MPa, the elongation at break is 610%, shao A hardness is 82. Reach the Bayer＇ s mechanical requirements. The sample has excellent acid and alkali resistance, hydrolysis resistance and high temperature resistance. DMA and TG show that the sample has a wide temperature range from -50℃ to 300℃. |
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| Keywords: | Polyurethane Hydrolysis Property |
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