材料研究学报  2010, Vol. 24 Issue (6): 579-584

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温敏聚氨酯软段的结晶行为及其智能响应特性

周虎1, 曾坚贤1, 陈东初1, 范浩军2, 曾俊长1

1.湖南科技大学化学化工学院 湘潭 411201 2.四川大学制革清洁技术国家工程实验室 成都 610065

The Crystalization of Soft Segment of Thermal Sensitive Polyurethane and Its Intelligent Properties

ZHOU Hu1,  ZENG Jianxian1,  CHEN Dengchu1,  FAN Haojun2,  ZENG Junchang1

1.School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201 2.National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065

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): 579-584.
. The Crystalization of Soft Segment of Thermal Sensitive Polyurethane and Its Intelligent Properties[J]. Chin J Mater Res, 2010, 24(6): 579-584.

摘要 参考文献 相关文章 Metrics 全文: PDF(990 KB)   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。 关键词 ： 智能材料,  聚氨酯,  结晶行为,  温敏特性     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, Ts). The switch temperature (Ts) and the thermal sensitivity of TSPU still remain available after thermal cyclic process. Moreover, when the temperature was lower than the Ts, the crystal of the soft segment was visible, but when the temperature exceeded the phase transition temperature of soft segment, the crystal of the soft segment melted and disappeared. As a result, the average radius (R) of the free volume holes and water vapor permeability of TSPU membrane showed a response to thermal stimuli. The phase transition of the soft segment controlled the significant change in free volume hole size and WVP, and the process mentioned above was stimulated by the external temperature. Key words： intelligent materials    polyurethane    crystallization    thermal sensitivity 收稿日期: 2010-04-21      ZTFLH:  TQ323.8   基金资助: 国家863计划2007AA032341和国家自然科学基金21006022, 20976040资助项目。 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 周虎 44.8K 链接本文: https://www.cjmr.org/CN/      或      https://www.cjmr.org/CN/Y2010/V24/I6/579 [1] Y.Chen, Y.Liu, H.J.Fan, Hui Li, Bi Shi, H.Zhou, B.Y.Peng, The polyurethane membranes with temperature sensitivity for water vapor permeation, Journal of Membrane Science, 287, 192(2007) [2] H.M.Jeong, J.B.Lee, S.Y.Lee, B.K.Kim, Shape memory polyurethane containing mesogenic moiety, Journal of Materials Science, 35, 279(2000) [3] X.M.Ding, J.L.Hu, X.M.Tao, Effect of crystal melting on water vapor permeability of shape memory polyurethane film, Textiles Research Journal, 74, 39(2004) [4] H.M.Jeong, B.K.Ahn, S.M.Cho, B.K.Kim, Water vapor permeability of shape memory polyurethane with amorphous reversible phase, Journal of Polymer Science: Part B: Polymer Physics, 38, 3009(2000) [5] H.J.Fan, L.Li, X.N.Fan, B.Shi, The water vapor permeability of leather finished by thermo-responsive polyurethane, Journal of the Society of Leather Technologists and Chemists, 89, 121(2005) [6] B.K.Kim, S.Lee, Y.Xu, Polyurethanes having shape memory effects, Polymer, 37, 5781(1993) [7] B.K.Kim, S.Y.Lee, J.S.Lee, Polyurethane ionomers having shape memory effects, Polymer, 39, 2803(1998) [8] S.Hayashi, N.Ishikawa, C.Giordano, High Moisture permeability Polyurethane for Textile Application, Journal of Coated Fabric, 23, 74(1993) [9] W.Y.Jeong, S.K.An, The transport properties of polymer membrane-fabric composites, Journal of Materials Science, 36, 4797(2001) [10] Y.C.Jean, J.P.Yuan, J.Liu, H.J.Yang, Correlations between gas permeation and free- 33 hole properties probed by position annihilation spectroscopy, Journal of Polymer Science: Part B: Polymer Physics, 33, 2365(1995) [11] H.Nakanishi, S.J.Wang, Y.C.Jean, Positron Annihilation Studies of Fluids (Singapore, World Science, 1988) p.81 [12] S.Mondal, J.L.Hu, Water vapor permeability of cotton fabrics coated with shape memory polyurethane, Carbohydrate Polymers, 25, 124(2006) [13] I.Yilgor, Textiles coated with waterproof, moisture vapor permeable polymers, US patent, 5, 389, 430(1995) [14] H.Yin, Z.J.Yin, W.T.Ma, D.M.Zhu, A review of studies of polymeric membranes by positron annihilation lifetime spectroscopy, Plasma Science and Technology, 7(5), 56(2005) [1] 叶姣凤, 王飞, 左洋, 张钧翔, 罗晓晓, 冯利邦. 兼具高强度、高韧性和自修复性能的环氧树脂改性热可逆聚氨酯[J]. 材料研究学报, 2023, 37(4): 257-263. 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