| FTIR研究热处理对RIM PUU的形态及力学性能的影响 |
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| 引用本文： | 李再峰,张田林,徐春明. FTIR研究热处理对RIM PUU的形态及力学性能的影响[J]. 光谱学与光谱分析, 2004, 24(9): 1066-1068 |
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| 作者姓名： | 李再峰 张田林 徐春明 |
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| 作者单位： | 青岛科技大学化学与分子工程学院,山东,青岛,266042;淮海工学院化工系,江苏,连云港,222000;石油大学国家重质油加工实验室,北京,102249 |
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| 基金项目： | 石油大学国家重点实验室开放基金(2003-04), 山东省教育厅基金(C00Y04)和教育部归国留学基金(2003-406)资助 |
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| 摘 要： | 将PUU(聚氨酯脲)样品薄膜放入FTIR恒温池内进行原位扫描。FTIR红外谱图的结果表明，在一定温度下，随着热处理时间的延长，氢键化的脲键的吸收逐渐增加，达到一定时间后，吸收变化甚微。在热处理过程中，有序氢键化脲键基团吸收的变化率(反映微相分离动力学)随着温度的提高而增加。PUU材料在热处理之前，羰基振动区内游离的氨酯键、无序氢键化的氨酯键、有序氢键化氨酯键、无序的氢键化脲键和有序的氢键化脲键等多种羰基并存，热处理后仅存游离的氨酯键、氢键化的氨酯键及有序的脲键3种吸收谱带。在100℃下，热处理时间(超过8h)越长，力学性能越差。而在相同的热处理时间(8h)内，热处理温度在100℃，PUU弹性体具有较好的综合力学性能。
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| 关 键 词： | PUU FTIR 形态 性能 |
| 文章编号： | 1000-0593(2004)09-1066-03 |
| 修稿时间： | 2003-03-28 |
Study on Effect of Thermal Process on the Morphology and Mechanical Properties of RIM PUU by In-situ FTIR |
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| LI Zai-feng ,ZHANG Tian-lin ,XU Chun-ming . College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao ,China. Study on Effect of Thermal Process on the Morphology and Mechanical Properties of RIM PUU by In-situ FTIR[J]. Spectroscopy and Spectral Analysis, 2004, 24(9): 1066-1068 |
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| Authors: | LI Zai-feng ZHANG Tian-lin XU Chun-ming . College of Chemistry Molecular Engineering Qingdao University of Science Technology Qingdao China |
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| Affiliation: | College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China. |
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| Abstract: | The samples of PUU polymers were characterized by In-situ FTIR in a temperature-controlled cell. The spectra of FTIR showed that the absorbance of ordered hydrogen-bonded urea carbonyl group (1643 cm(-1)) became stronger with increasing thermal process time (at 100 degrees C), then changed little after a certain time. The rate of change for absorbance of ordered hydrogen-bonded urea link, attributed to microphase separation kinetics, was enhanced with increasing thermal process temperature. In carbonyl region of FTIR spectra, absorbance for various carbonyls available in PUU polymers, associated with micro-hard domain, was observed before process. However, after the process, only the absorbance of free urethane, hydrogen-bonded urethane and ordered urea became obvious. At 100 degrees C, the longer the process time (beyond 8 h), the worse the mechanical properties obtained. The PUU polymers processed at 100 degrees C with the identical process time exhibited the best mechanical properties. |
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| Keywords: | PUU FTIR Morphology Properties |
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