Please wait a minute...
材料研究学报  2007, Vol. 21 Issue (2): 177-182    
  论文 本期目录 | 过刊浏览 |
聚碳硅烷纤维在环己烯气氛中的不熔化处理
毛仙鹤  宋永才  李伟  杨大祥
引用本文:

毛仙鹤; 宋永才; 李伟; 杨大祥 . 聚碳硅烷纤维在环己烯气氛中的不熔化处理[J]. 材料研究学报, 2007, 21(2): 177-182.

全文: PDF(470 KB)  
摘要: 将聚碳硅烷(PCS)纤维在环己烯气氛中进行化学气相交联不熔化处理,其氧含量比空气不熔化处理大大降低,组成和结构也发生了变化,气体副产物中存在环己烷和小分子硅烷.在环己烯气氛中,随着温度的升高,PCS分子的Si-H键的反应程度逐渐提高,纤维的凝胶含量逐渐增大.环己烯受热引发PCS分子中的Si-H和Si-CH3键断裂生成Si自由基和Si-CH2自由基,促进PCS分子间形成Si-CH2-Si交联结构;同时,环己烷作为侧基引入到PCS分子结构中,使纤维的碳含量随之增高.随着反应温度的升高,部分环己烷侧基和少量小分子硅烷会从PCS分子主链脱出.
Key words
收稿日期: 1900-01-01     
1 CHU Zengyong, SONG Yongcai, FENG Chunxiang, Advances in the polymer-derived continuous SiC fibers, Journal of Inorganic Materials, 17(2), 193(2002) (楚增勇,宋永才,冯春祥,先驱体转化法连续SiC纤维国内外研究与开发现状,无机材料学报,17(2),193(2002))
2 CHENG Xiangzhen, XIAO Jiayu, XIE Zhengfang, Research on curing of polycarbosilane fiber and preparation of SiC fiber, Journal of Materials Engineering, 1, 29(2004) (程样珍,肖加余,谢征芳,聚碳硅烷纤维的不熔化与SiC纤维制备研究,材料工程,1,29(2004))
3 T.Shimoo, K.Okamura, Y.Morisada, Active-to-passive oxidation transition for polycarbosilane-derived silicon carbide fibers heated in Ar-O2 gas mixtures, J. Mater. Sci., 37, 1793(2002)
4 M.Takeda, A.Urano, J.Sakamoto, Microstructure and oxidation behavior of silicon carbide fibers derived from polycarbosilane, J. Am. Ceram. Soc, 83(5), 1171(2000)
5 T.Mah, N.L.Hecht, D.E.Mc.Cullum, Thermal stability of SiC fibers(nicalon), J. Mater. Sci., 19(4), 1191(1984)
6 WANG Jun, FENG Chunxiang, SONG Yongcai, The oxidative stabilization of polycarbosilane fibers in air, Acta Chimica Sinica., 56(1), 77(1998) (王军,冯春样,宋永才,聚碳硅烷纤维的空气不熔化处理,化学学报,56(1),77(1998))
7 H.Q.Ly, R.Taylor, R.J.Day, Conversion of polycarbosilane (PCS) to SiC-based ceramic.PartⅠ. Characterisation of PCS and curing products, J. Mater. Sci., 36, 4037(2001)
8 S.Ochiaia, S.Kimurab, H.Tanakab, Degradation of SiC/SiC composite due to exposure at high temperatures in vacuum in comparison with that in air, Composites Part A-Applied Science and Manufacturing, 35, 33(2004)
9 C.Zengyong, S.Yongcai, Enhanced irradiation crosslinking of polycarbosilane, J. Mater. Sci. Lett., 18, 1793(1999)
10 C.Zengyong, S.Yongcai, Different influence of EB irradiation on the structural behaviors of polycarbosilane and polysilazane fibers, J. Mater. Sci. Lett., 19, 1771(2000)
11 A.Idesaki, M.Narisawa, K.Okamura, Application of electron beam curing for silicon carbide fiber synthesis from blend polymer of polycarbosilane and polyvinylsilane, Radiat. Phys. Chem., 60(4-5), 483(2001)
12 T.William, D.B.Christopher, D.S.Michael, Polymerderived SiC fibers with low oxygen content and improved thermomechanical stability, Compos. Sci. Technol., 51, 145(1994)
13 Y.Hasegawa, SiC fiber prepared from polycarbosilane cured without oxygen, J. Inorg. Organomet. Polym., 2(1), 161(1992)
14 Y.Hasegawa, New curing method for polycarbosilane with unsaturated hydrocarbons and application to thermally stable SiC fiber, Compos. Sci. Technol., 51, 161(1994)
15 SHENG Xiaoli, LI Fengyi, YANG Jian, Study of the catalytic hydrosilylation of cyclohexyl-containing organosilicon, Journal of Nanchang University, 24(2), 131(2000) (盛晓莉,李凤仪,杨健,环状和链状烯烃的硅氢加成研究,南昌大学学报,24(2),131(2000))
No related articles found!