| 温敏聚氨酯软段的结晶行为及其智能响应特性 |
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| 引用本文： | 周虎,曾坚贤,陈东初,范浩军,曾俊长.温敏聚氨酯软段的结晶行为及其智能响应特性[J].材料研究学报,2010,24(6). |
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| 作者姓名： | 周虎 曾坚贤 陈东初 范浩军 曾俊长 |
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| 作者单位： | 湖南科技大学化学化工学院,湘潭,411201;四川大学制革清洁技术国家工程实验室,成都,610065 |
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| 基金项目： | 国家“863”计划2007AA032341; 国家自然科学基金21006022,20976040资助项目~~ |
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| 摘 要： | 采用两步溶液共聚技术制备了一种温敏聚氨酯材料,并对其软段的结晶行为以及智能响应特性和机理进行了分析。结果表明:温敏聚氨酯具有典型的嵌段和微相分离结构,软段和硬段各具独立的结晶熔融转变温度(软段的结晶熔融转变温度定义为开关温度),且软段的结晶具有较好的热致可逆性。当温度低于开关温度时,软段具有完整的结晶形态,温敏聚氨酯膜的内部自由体积孔洞尺寸和透汽性均较低;当温度高于开关温度时,软段结晶完全熔融、消失,同时膜的内部自由体积孔洞尺寸和透汽性均明显增大,显示了温敏特性。温敏聚氨酯软段的相态转变决定材料的智能响应特性,并且这一过程可通过外界温度的改变加以控制。
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| 关 键 词： | 智能材料 聚氨酯 结晶行为 温敏特性 |
The Crystalization of Soft Segment of Thermal Sensitive Polyurethane and Its Intelligent Properties |
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| ZHOU Hu ZENG Jianxian CHEN Dengchu FAN Haojun ZENG Junchang .School of Chemistry , Chemical Engineering,Hunan University of Science , Technology,Xiangtan .National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University,Chengdu.The Crystalization of Soft Segment of Thermal Sensitive Polyurethane and Its Intelligent Properties[J].Chinese Journal of Materials Research,2010,24(6). |
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| Authors: | ZHOU Hu ZENG Jianxian CHEN Dengchu FAN Haojun ZENG Junchang School of Chemistry Chemical Engineering Hunan University of Science Technology Xiangtan National Engineering Laboratory for Clean Technology of Leather Manufacture Sichuan University Chengdu |
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| Affiliation: | ZHOU Hu~(1**) ZENG Jianxian~1 CHEN Dengchu~1 FAN Haojun~2 ZENG Junchang~1 1.School of Chemistry , Chemical Engineering,Hunan University of Science , Technology,Xiangtan 411201 2.National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University,Chengdu 610065 |
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| Abstract: | A thermal sensitive polyurethane(TSPU) membrane was prepared by two-step polymerization in solvent and the crystallization of soft segment was analyzed.The results reveal that TSPU shows an obvious phase-separated structure and a phase transition temperature of the soft segment(defined as switch temperature,T_s).The switch temperature(T_s) and the thermal sensitivity of TSPU still remain available after thermal cyclic process.Moreover,when the temperature was lower than the T_s,the crystal of the soft segme... |
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| Keywords: | intelligent materials polyurethane crystallization thermal sensitivity |
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