NONISOTHERMAL CRYSTALLIZATION OF POLYMERS IN SAMPLES OF FINITE DIMENSIONS - 2 - DESCRIPTION OF SPHERULITIC PATTERN-FORMATION

The formation and final form of spherulite pattern in samples of finit e thickness, strips and plates, are described by means of the conversi on degree, the rate of formation of spherulitic interiors and the dist ributions of distances from spherulites centers to spherulites interio rs. Two model crystallization processes are considered: crystallizatio n with instantaneous nucleation and isokinetic crystallization, The in fluence of the instantaneous nucleation at sample boundaries on the sp herulitic structure formation is also discussed. The master curve appr oach for the processes considered is proposed. The results in analytic al forms are verified by computer simulation of spherulitic crystalliz ation in two- and three-dimensional samples of finite thickness.