| 不同分子量固态与液态聚碳硅烷的黏度特性 |
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| 引用本文： | 胡继东.不同分子量固态与液态聚碳硅烷的黏度特性[J].宇航材料工艺,2012,42(2):81-83. |
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| 作者姓名： | 胡继东 |
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| 作者单位： | 1. 航天材料及工艺研究所,先进功能复合材料技术重点实验室,北京100076
2. 中国科学院化学研究所,北京,100190 |
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| 摘 要： | 采用GPC、流变仪等分析手段对不同分子量的固态PCS和液态PCS的黏度进行表征.分析了PCS分子量、软化点及黏度特性之间的关系.此外还用热重法对固态和液态PCS陶瓷产率进行表征.结果表明,LPCS在室温黏度较低,陶瓷产率较高(77％),而固态PCS熔体在＞200℃具有较低黏度(500 mPa·s),因此LPCS更适于用作PIP法制备陶瓷基复合材料浸渍前驱体.
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| 关 键 词： | PCS LPCS 黏度 陶瓷产率 |
Viscosity of Solid and Liquid Polycarbosilanes WithDifferent Molecular Weight |
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| Hu Jidong
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Tao Meng
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Li Yongming
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Li Junping
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Zhou Yanchun.Viscosity of Solid and Liquid Polycarbosilanes WithDifferent Molecular Weight[J].Aerospace Materials & Technology,2012,42(2):81-83. |
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| Authors: | Hu Jidong Tao Meng Li Yongming Li Junping Zhou Yanchun |
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| Institution: | 1(1 Science and Technology on Advanced Functional Composites Laboratory,Aerospace Research Institute of Materials & Processing Technology,Beijing 100076)(2 Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190) |
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| Abstract: | The viscosity of solid and liquid polycarbosilanes with different molecular weight were investigated based on GPC and Rheometer analysis.And the relationship between molecular weight,soft temperature and viscosity were established.The ceramic yields of these polycarbosilanes were reported based on TGA.The results indicated LPCS had lower viscosity(under 200 mPa·s) at room temperature and higher ceramic yields(77%,N2),whereas the molten solid PCS had viscosity of 500 mPa·s only above 200℃ so that LPCS is more suitable for room temperature PIP than PCS to make ceramic matrix composites. |
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| Keywords: | Polycarbosilanes Liquid polycarbosilanes Viscosity Ceramic yields |
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