A series of maleimide-terminated amorphous poly(dimethylsiloxanes) were synthesized from amino-terminated poly(dimenthylsiloxanes) with various molecular weights. The oligomers were characterized by Fourier transform infrared spectroscopy and proton magnetic resonance spectroscopy. Thermally induced polymerization kinetics was investigated using differential scanning calorimetry. Kinetic parameters could be obtained by a dynamic method. The results of these experiments are quite close to first-order reaction for the maleimide double bond polymerization, regardless of the length of the imide end-capped oligomers which can be explained from theory (reaction mechanism) and experiment. Apparent activation energies (Ea) in the range of 101.52–118.09 kJ/mol and pre-exponential factors (K0) in the range of 1.35 × 10 9 –1.63 × 10 11 min 21 were obtained.
Посилання на статтю:
Thermally initiated cure kinetic of bismaleimides containing poly(dimethylsiloxane) / Wang Chun-Shan, Leu Tsu-Shang // Polymer. – 1999. – N 40. – P. 5407–5413.