Abstract
The effects of temperature and duration of melting on the rate of isothermal crystallization of isotactic polypropylene were investigated by differential scanning calorimetry (DSC). Crystallization rates were found to decrease with increasing melt temperature and melting time. The results were discussed in the framework of the theoretical model of transient isothermal crystallization developed by the present authors [1]. The results suggest gradual destruction of predetermined nuclei with activation energyE a=89±7 kJ/mole as a main mechanism of the observed effects.
Similar content being viewed by others
References
Ziabicki A, Alfonso GC (1994) Colloid Polym Sci 272:1027
Kolmogoroff AN (1937) Izvestiya Akad Nauk SSSR, Ser Math 3:335
Avrami M (1939) J Chem Phys 7:1103
Evans UR (1945) Trans Faraday Soc 41:365
Barham PJ (1993) in: “Crystallization of Polymers”, Dosière M, Ed., NATO ASI Series, C-405, p. 153, Kluwer Academic Press, Dordrecht
Carfagna C, De Rosa C, Guerra G, Petraccone V (1984) Polymer 25:1462
Fillon B, Wittmann JC, Lotz B, Thierry A (1993) J Polym Sci B Polym Phys 31:1383
Fillon B, Lotz B, Wittmann JC, Thierry A (1993) J Polym Sci B Polym Phys 31:1395
Fillon B, Thierry A, Wittmann JC, Lotz B (1993) J Polym Sci B Polym Phys 31:1407
Janimak JJ, Cheng SZD, Giusti PA, Hsieh ET (1991) Macromolecules 24:2253
Janimak JJ, Cheng SZD, Zhang A, Hsieh ET (1992) Polymer 33:728
Wunderlich B (1980) “Macromolecular Physics”, Vol. 3, Academic Press, New York
Monasse B, Haudin JM (1986) Colloid Polym Sci 264:117
Blundell DJ, Keller A, Kovacs AJ (1966) J Polymer Sci Ser B 4:481
Billingham NC, Calvert PD, Uzuner A (1990) Polymer 31:258
Author information
Authors and Affiliations
Additional information
This work and Part I of this research [1] have been supported in part by Research Grant Number PB 1291/52/93/04 from State Committee for Scientific Research (KBN), Poland, and by 40% MURST founds, Italy.
Rights and permissions
About this article
Cite this article
Alfonso, G.C., Ziabicki, A. Memory effects in isothermal crystallization II. Isotactic polypropylene. Colloid Polym Sci 273, 317–323 (1995). https://doi.org/10.1007/BF00652344
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00652344