| 双(N-甲基乙酰氨基)二甲基硅烷的合成与扩链效应 |
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| 引用本文： | 胡洪国,郑强,林薇薇,陈春荣,陶小乐.双(N-甲基乙酰氨基)二甲基硅烷的合成与扩链效应[J].高等学校化学学报,2005,26(3):592-594. |
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| 作者姓名： | 胡洪国 郑强 林薇薇 陈春荣 陶小乐 |
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| 作者单位： | 1. 浙江大学高分子科学与工程学系,杭州 310027;
2. 杭州之江有机硅化工有限公司研发中心,杭州 311203 |
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| 基金项目： | 国家高技术研究发展计划(863计划);国家自然科学基金 |
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| 摘 要： | 由于高层建筑及大型混凝土设施接缝的特殊工程要求，使低模量、高延伸率的新型有机硅建筑密封材料成为近年来追求的目标．从理论上讲，加入合适的扩链剂(Chain extender)，可使有机硅密封材料在交联的同时分子链线形加长、交联点减少、网络拓扑结构改变．通过改变交联点的疏密与分布，
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| 关 键 词： | N-甲基乙酰氨基硅烷 扩链剂 有机硅化合物 低模量 密封胶 |
| 文章编号： | 0251-0790(2005)03-0592-03 |
| 收稿时间： | 2004-03-05 |
Synthesis and Chain-extending Effect of Bis(N-methyl-acetamido)dimethylsilane |
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| HU Hong-Guo,ZHENG Qiang,LIN Wei-Wei,CHEN Chun-Rong,TAO Xiao-Le.Synthesis and Chain-extending Effect of Bis(N-methyl-acetamido)dimethylsilane[J].Chemical Research In Chinese Universities,2005,26(3):592-594. |
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| Authors: | HU Hong-Guo ZHENG Qiang LIN Wei-Wei CHEN Chun-Rong TAO Xiao-Le |
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| Institution: | 1. Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China;
2. R & D Center, Hangzhou Zhijiang Silicone Co., Ltd., Hangzhou 311203, China |
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| Abstract: | A linear difunctional silylamide, bis(N-methylacetamido)dimethylsilane(MADMS), was synthesized by the reaction of dimethyldichlorosilane and N-methylacetamide. The chemical structure of the product was confirmed by IR, 1H NMR and elemental analysis. When MADMS was mixed with PDMS, both the molecular weight and the viscosity of the mixture, as measured by GPC and viscometer, were found to be increased significantly in the initial period, which was ascribed to the hydrolysis efficiency of MADMS. The results show that MADMS possessed the chain-extending ability and can be used for mass application. |
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| Keywords: | Bis(N-methylacetamido)dimethylsilane Chain extender Organosilane compound Low modulus Sealants |
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