The overall isothermal crystallization kinetics for isotactic polypropylene (iPP) in dotriacontane was investigated. Half-time was determined via differential scanning calorimetry as a function of the experimentally-controlled variables, dilution and crystallization temperature. Polymer concentration was varied from 100 to 10 wt% iPP in 10wt% intervals. Crystallization temperature was varied from 415 to 380 K in 1 K intervals. The influence of these variables on crystallization mechanism and spherulitic structure, as implied by the Avrami analysis, was determined, and their influence on fold surface energy was exained by the Lauritzen and Hoffman analysis.
Посилання на статтю:
Isothermal crystallization of isotactic polypropylene in dotriacontane. IV. Effect of dilution and crystallization temperature on overall crystallization kinetics / Yu. F. Wang* and Douglas R. Lloyd // Polymer. – 1993. – Vol 34. – P. 4740-4746.