Crystallization of Poly-(Tetramethyl-p-Silphenylene)-Siloxane Polymers

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Abstract
The kinetics of spherulite growth of TMPS has been measured as a function of the fusion conditions (time of melting and fusion temperature) for different crystallization temperatures. The influence of fusion conditions on nucleation is described. The rates of spherulite growth (G) have been measured through the maximum in the G/T curve over the range 20°–130°C, approximately. Fractionated, unfractionated, and a few mixed polymer fractions were studied. The morphology and growth rates of spherulites from the glassy and molten states are compared. The implications of these results are discussed in relation to chain mobility and to the long‐range coil‐coil interactions which give rise to a strong dependence of the viscosity or diffusion co‐efficients on chain length and dimensions.