| 不同硬段含量溶液聚合和RIM嵌段聚脲热性质和动态力学性质的研究 |
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| 引用本文： | 陈竹生,Willkomm W R,Macosko C W.不同硬段含量溶液聚合和RIM嵌段聚脲热性质和动态力学性质的研究[J].高等学校化学学报,1990(4). |
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| 作者姓名： | 陈竹生 Willkomm W R Macosko C W |
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| 作者单位： | 烟台大学化学工程与生物化学系
(陈竹生)，美国明尼苏达大学化工材料系
(Willkomm W R)，美国明尼苏达大学化工材料系(Macosko C W) |
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| 摘 要： | 用溶液聚合法和RIM制备了软段为胺端基聚环氧丙烷,硬段为4,4′-二苯甲烷二异氰酸酯(含量为30％,50％,70％)经二乙基甲苯二胺扩链的热塑性嵌段聚脲。用动态力学温度谱(DMS)和示差扫描量热计法(DSC)对比研究了这些聚脲的性质。结果表明,溶液聚脲比RIM聚脲的枢分离情况好。DMS和DSC均未观察到聚脲中硬段的玻璃化转变。
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| 关 键 词： | 聚氨酯 聚脲 反应注射成型 |
Studies on Thermal and Dynamic Mechanical Properties of RIM and Solution Polymerized Polyureas with Various Hard Block Contents |
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| Chen Zhusheng.Studies on Thermal and Dynamic Mechanical Properties of RIM and Solution Polymerized Polyureas with Various Hard Block Contents[J].Chemical Research In Chinese Universities,1990(4). |
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| Authors: | Chen Zhusheng |
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| Abstract: | A series of amine terminated polypropylene oxide based on thermoplastics polyureas with 30%,50% ,and 70% hard segment contents were synthesized via solution polymerization and reaction injection moulding (RIM). Amine terminated polypropylene oxide was used as the soft segment and 4,4'-diphenylmethanediisocyanate (MDI) extended with diethyltoluenediamine (DETDA) was used as the hard segment. These polyureas were characterized by differential scanning calorimetry (DSC), dynamic mechanical spectroscopoy (DMS). RIM polyureaas have poorer phase separation than solution polyurea as seen by DSC,DMS, especially at high hard segment levels. Any evidence of a hard segment glass transition in polyureas has not been found by DSC and DMS. |
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| Keywords: | Polyurethane Polyurea Reaction injection molding |
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