An understanding of the crystallization kinetics of a polymer melt is pertinent to the processing and properties of a polymer. In this study the crystallization kinetics and structure development of vinylidene chloride/vinyl chloride (VDC/VC) copolymers were studied using differential scanning calorimetry (d.s.c.) and hot stage/optical microscopy. The time and temperature dependence of the growth and nucleation rates were determined along with the crystal growth geometry. Using hot stage/optical microscopy, the growth rate was found to be linear and the maximum rate occurs around 373 K. Both d.s.c, and microscopy indicate that nucleation is via nuclei that survive the melt and nuclei that grow in as crystallization proceeds. The maximum nucleation rate occurs around 283 K and the time dependence due to supercooling was found to follow a first-order rate law. Thermal decomposition of the polymer was found to be an important aspect of the crystallization kinetics
Посилання на статтю:
Crystallization kinetics of vinylidene chloride/vinyl chloride copolymers / J. J. Gunderson* and G. A. Von Wald // Polymer. – 1993. – Vol 34. – P. 2185-2191.