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    題名: A kinetic study on the autocatalytic cure reaction of a cyanate ester resin
    作者: Chen, Ching-chung;董崇民;Don, Trong-ming;Lin, Tai-hung;Cheng, Liao-ping
    貢獻者: 淡江大學化學工程與材料工程學系
    日期: 2004-06
    上傳時間: 2010-03-09 09:54:42 (UTC+8)
    出版者: Wiley-Blackwell
    摘要: The cure of a novolac-type cyanate ester monomer, which reacts to form a polycyanurate network, was investigated by using differential scanning calorimeter. The conversions and the rates of cure were determined from the exothermic curves at several isothermal temperatures (513–553 K). The experimental data, showing an autocatalytic behavior, conforms to the kinetic model proposed by Kamal, which includes two reaction orders, m and n, and two rate constants, k1 and k2. These kinetic parameters for each curing temperature were obtained by using Kenny's graphic-analytical technique. The overall reaction order was about 1.99 (m = 0.99, n = 1.0) and the activation energies for the rate constants, k1 and k2, were 80.9 and 82.3 kJ/mol, respectively. The results show that the autocatalytic model predicted the curing kinetics very well at high curing temperatures. However, at low curing temperatures, deviation from experimental data was observed after gelation occurred. The kinetic model was, therefore, modified to predict the cure kinetics over the whole range of conversion. After modification, the overall reaction order slightly decreased to be 1.94 (m = 0.95, n = 0.99), and the activation energies for the rate constants, k1 and k2, were found to be 86.4 and 80.2 kJ/mol.
    關聯: Journal of applied polymer science 92(5), pp.3067-3079
    DOI: 10.1002/app.20314
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

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