| 聚碳硅烷熔体的稳态流变性能 |
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| 引用本文： | 王骥洲,李俊杰,余煜玺,龚朝阳,程璇,张颖. 聚碳硅烷熔体的稳态流变性能[J]. 高分子材料科学与工程, 2009, 0(7) |
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| 作者姓名： | 王骥洲 李俊杰 余煜玺 龚朝阳 程璇 张颖 |
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| 作者单位： | 厦门大学材料学院材料科学与工程系;特种先进材料实验室;厦门大学数学科学学院; |
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| 基金项目： | 国家自然科学基金资助项目(50532010); 福建省特种先进材料重点实验室基金资助项目(2006L2003) |
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| 摘 要： | 采用自制装置对聚碳硅烷(PCS)熔体进行预处理。通过预处理获得三种不同分子量的PCS,并对其进行物理化学和稳态流变性能测试。结果表明,预处理后的PCS其数均分子量为1000 g/mol~1400 g/mol,属低聚物。在温度范围240℃~260℃和剪切速率范围0.001 s-1~10 s-1内有明显的剪切变稀现象。在测试的温度范围内,剪切变稀区的非牛顿指数随温度升高先减小后增大。预处理后的PCS粘流活化能为120 kJ/mol~180 kJ/mol,比一般高聚物的高得多。
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| 关 键 词： | 聚碳硅烷 预处理 流变性能 粘流活化能 |
Steady-State Rheological Characterizations of Polycarbosilane Melts |
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| WANG Ji-zhou,LI Jun-jie,YU Yu-xi,GONG Chao-yang,CHENG Xuan,ZHANG Ying. Steady-State Rheological Characterizations of Polycarbosilane Melts[J]. Polymer Materials Science & Engineering, 2009, 0(7) |
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| Authors: | WANG Ji-zhou LI Jun-jie YU Yu-xi GONG Chao-yang CHENG Xuan ZHANG Ying |
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| Affiliation: | WANG Ji-zhou1,LI Jun-jie2,YU Yu-xi1,GONG Chao-yang1,CHENG Xuan1,ZHANG Ying1(1.Department of Materials Science and Engineering,Advanced Materials Laboratory,College of Materials,2.School of Mathematical Science,Xiamen University,Xiamen 361005,China) |
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| Abstract: | A self-made deaeration apparatus was constructed to minimize the small bubbles of polycarbosilane(PCS) melts resulted at high temperatures.Three types of PCS samples with different numbers of average molecular weight(n) after the pre-treatment were obtained.The n values varied from 1000 g/mol to 1400 g/mol,suggesting the nature of low polymers.The physical and chemical properties,as well as the steady-state rheological properties of pre-treated and raw PCS samples were examined and compared.The results show... |
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| Keywords: | polycarbosilane pre-treatment rheological properties viscous flow activation energy |
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