Synthesis and cure kinetics of diphenyl(diphenylethynyl)silane monomer

Synthesis and cure kinetics of diphenyl(diphenylethynyl)silane monomer Diphenyl(diphenylethynyl)silane ((ph–C≡C)2–Si–ph2) (DPDPES) was synthesized by the Grignard reaction. The corresponding isothermal and non-isothermal cure kinetics of DPDPES were analyzed by using differential scanning calorimetry (DSC), and the molecular structure was characterized by H-NMR. The results showed that all the cure curves were typically sigmoid shape and cure reactions could be described by an autocatalytic kinetic model by isothermal DSC. The kinetic data, for example, activation energy (E) and frequency factor (A), were 119.22 kJ/mol and 4.67 × 107 (s−1), respectively. The non-isothermal DSC analyses showed that E and A were 162.12 kJ/mol and 1.32 × 109 (s−1), respectively, and the reaction order was 0.94. Based on the research work of this paper, it can be said that the cure reaction of DPDPES monomer was of autocatalytic and diffusion-controlled characteristics, and the effect of the diffusion was more evident at low temperature. The cure reaction of DPDPES was a first-order kinetic reaction. Research on Chemical Intermediates Springer Journals

Synthesis and cure kinetics of diphenyl(diphenylethynyl)silane monomer

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Springer Netherlands
Copyright © 2012 by Springer Science+Business Media Dordrecht
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
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