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Received October 27, 2003
Accepted April 23, 2004
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The Kinetics of Oxidation Curing of Polycarbosilane Fibers
CFC Key Lab., National University of Defense Technology, Changsha, Hunan, P.R., China 1Department of Fine Chemical Engineering and Chemistry, Chungnam National University, Daejeon 305-764, China
xdlw@publics.cs.hn.cn
Korean Journal of Chemical Engineering, July 2004, 21(4), 901-904(4), 10.1007/BF02705537
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Abstract
For the oxidation curing of polycarbosilane (PCS) fibers in air, a first-order reaction based on the weight gain w (in percentage) was approached with the kinetic equation dw/dt=k(wm-w). The maximum weight gain wm was observed to be 16% under normal oxidation conditions and the activation energy E to be 79.27 kJ/mol. The numeric integration based on the kinetics provides a precise prediction of the curing degree of PCS fibers under various heating programs and conditions.
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