| 硬链段浓度对RIM交联聚氨酯结构和性能的影响 |
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| 引用本文： | 张建元,王得宁,李迈进,胡春圃,应圣康.硬链段浓度对RIM交联聚氨酯结构和性能的影响[J].高等学校化学学报,1991,12(11):1547. |
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| 作者姓名： | 张建元 王得宁 李迈进 胡春圃 应圣康 |
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| 作者单位： | 华东化工学院材料科学研究所, 上海, 200237 |
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| 摘 要： | 用l-MDI/1,4-BDO/PPO-EO快反应体系,考察硬段浓度对聚氨酯结构与性能的影响。发现样品的交联度、模量和抗张强度随硬段浓度增加而提高,交联趋向均匀,断裂伸长率在浓度30％处出现最大值。ATR-FTIR和DSC分析表明,微相分离程度随硬段浓度增大而降低。
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| 关 键 词： | 反应注射成型 聚氨酯 微相分离 交联 |
| 收稿时间： | 1990-05-15 |
Effect of Content of Hard Segment on Structures and Properties of RIM Crossl inking Polyurethanes |
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| Zhang Jian-yuan,Wang De-ning,Li Mai-jin,Hu Chun-pu,Ying Sheng-kang.Effect of Content of Hard Segment on Structures and Properties of RIM Crossl inking Polyurethanes[J].Chemical Research In Chinese Universities,1991,12(11):1547. |
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| Authors: | Zhang Jian-yuan Wang De-ning Li Mai-jin Hu Chun-pu Ying Sheng-kang |
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| Institution: | Institute of Material Science and Engineering?East China Universityof Chemical Technology, Shanghai, 200237 |
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| Abstract: | The effect of content of hard segment on the structure and properties of RIM crosslinking polyurethane(l-MDI/l , 4-BDO/PPO-EO) has been studied. The results of equilibrium swelling, ATR-FTIR and DSC show that increasing the content of hard segment increases the degree of linkage ,and decreases the degree of microphase separation and ordering in the hard rich domains. By TEM, the phase separation phenomena on different levels, namely, macrophase separation and microphase separation were observed. |
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| Keywords: | Reaction injection molding Polyurethane Microphase separation Crosslinking |
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