| 引用本文: | 薛金根,王应德,宋永才,等.超高分子量聚碳硅烷的合成及其表征.[J].国防科技大学学报,2006,28(6):28-31.[点击复制] |
| XUE Jingen,WANG Yingde,SONG Yongcai,et al.Synthesis of Polycarbosilane with a Super High Molecule Weight and Its Characterization[J].Journal of National University of Defense Technology,2006,28(6):28-31[点击复制] |
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| 超高分子量聚碳硅烷的合成及其表征 |
| 薛金根, 王应德, 宋永才, 秦墨林 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 采用正交设计的方法从常压合成得到的中低分子量PCS出发进行热压合成制备超高分子量PCS；并运用红外、GPC、核磁共振等分析测试手段对其结构和性能进行了表征。研究表明：控制热压反应温度在460～470℃、预加压力1～2MPa、反应6h时得到超高分子量PCS的重均分子量在6400～8500；通过控制热压反应时间可以较好的调控超高分子PCS的分子量大小；热压合成后制得的超高分子量PCS的支化度和Si-H键含量有所降低。 |
| 关键词: 聚碳硅烷 分子量 合成 表征 |
| DOI： |
| 投稿日期：2006-03-21 |
| 基金项目:国家863计划资助项目(2002AA305101)；国家自然科学基金资助项目(50403010) |
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| Synthesis of Polycarbosilane with a Super High Molecule Weight and Its Characterization |
| XUE Jingen, WANG Yingde, SONG Yongcai, QIN Molin |
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(College of Aerospace and Materials Engineering， National Univ. of Defense Technology，ChangSha 410073，China)
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| Abstract: |
| By orthogonal design strategy, PCS with a super high molecule weight was synthesized under high pressure from the PCS with a low/middle molecule weight synthesized under normal pressure. Its structure and performance were characterized by FTIR、GPC and NMR. It was found that suitable reaction condition should be 6 hours at 460℃ to 470℃ and under 1MPa to 2MPa beforehand. Average molecule weight of the synthesized PCS was 6400 to 8500. Both its degree of branching and its content of Si-H bond decreased slightly compared with the material PCS. The average molecule weight of PCS with a super high molecule weight could be adjusted preferably by means of controlling reaction time. |
| Keywords: polycarbosilane molecule weight synthesis characterization |
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