Facile synthesis of a melt-spinnable polyborazine from asymmetric alkylaminoborazine |
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| Authors: | Yong Peng Leia Ying De Wang Yong Cai Songa Yi He Lib Hao Wanga Cheng Denga Zheng Fang Xiea a State Key Laboratory of Advanced Ceramic Fibers & Composites College of Aerospace Materials Engineering National University of Defense Technology Changsha China b College of Science China |
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| Affiliation: | a State Key Laboratory of Advanced Ceramic Fibers & Composites, College of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, China;b College of Science, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | A novel asymmetric alkylaminoborazine monomer, 2-propylamino-4,6-bis(methylamino)borazine, was synthesized for the first time, and directly polymerized to give a melt-spinnable polyborazine (PBN). This asymmetric alkylaminoborazine was synthesized by an aminolysis reaction of 2,4,6-trichloroborazine (TCB) with different amines under mild conditions. This route turns out to be much cheaper and simpler than the conventional routes. The chemical composition, structure, molecular weights and ceramic yield were investigated by EA, FTIR, NMR, GPC and TG analysis. The PBN exhibits suitable rheological property for melt-spinning, which suggests that it is a potential precursor for BN fibers. |
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| Keywords: | Asymmetric alkylaminoborazine Polyborazine Melt-spinning BN fibers |
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