Abstract
The secondary crystallization of isotactic polypropylene in its blend with the elastomers ethylene-propylene-diene-terpolymer (EPDM) and trans-polyoctenylene (TOR), which occurs during isothermal crystallization, has been measured by time-dependent recording of X-ray wide-angle scattering. From the results, Avrami exponents were determined, which show that secondary crystallization takes place primarily within the already formed spherulites. Avrami exponents of the primary crystallization have been determined by the same method and also by observation of the spherulitic growth in the polarization microscope. It was found that both elastomers have different effects on the crystallization behaviour of the polypropylene.
Similar content being viewed by others
References
R. Kosfeld, K. Schaefer, E. A. Hemmer and M. Hess, in “Integration of Fundamental Polymer Science and Technology”, edited by L. A. Kleintjens and P. J. Lemstra, Rolduc Polymer Meeting 4 (Elsevier, London, New York, 1989).
W. Wenig and H.-W. Fiedel, Makromol. Chem. 192 (1991) 85.
E. Martuscelli, C. Silvestre and L. Bianchi, Polymer 24 (1983) 1458.
W. Wenig and H.-W. Fiedel, Makromol. Chem. 192 (1991) 191.
H. E. Kissinger, Anal. Chem. 29 (1957) 1702.
K. Matusita and S. Sakka, J. Non-Cryst. Solids 38/39 (1980) 741.
D. W. Hendersen, ibid. 30 (1979) 301.
P. G. Boswell, J. Mater. Sci. 15 (1980) 1939.
J. N. Hay, Br. Polym. J. 11 (1979) 137.
K. Harnisch and H. Muschik, Colloid Polym. Sci. 261 (1983) 908.
L. S. Remaly and J. M. Schultz, J. Appl. Polym. Sci. 14 (1970) 1871.
A. Wasiak, Chemtracts-Macromol. Chem. 2 (1991) 211.
A. Weidinger and P. H. Hermans, Makromol. Chem. 50 (1961) 98.
G. Bodor, M. Grell and A. Kallo, Faserforsch. Textiltechn. 15 (1964) 527.
F. Rybnikar, Kunststoffe 57 (1967) 199.
C. G. Vonk, J. Appl Crystallogr. 6 (1973) 158.
M. Avrami, J. Chem. Phys. 7 (1939) 1103.
Idem, ibid. 8 (1940) 212.
Idem, ibid. 9 (1941) 177.
L. Mandelkern, “Crystallization of Polymers” (Mcgraw-Hill, New York, 1963).
F. L. Binsbergen, J. Polym. Sci. Polym. Symp. 59 (1977) 11.
J. P. Mercier, Polym. Eng. Sci. 30 (1990) 270.
N. Billon, J. M. Escleine and J. M. Haudin, Colloid Polym. Sci. 267 (1989) 527.
H. W. Starkweather and R. E. Brooks, J. Appl. Polym. Sci. 1 (1959) 236.
T. I. Sogolova, Polym. Mech. 1 (1965) 1.
Y. L. Vinogradskaya, G. A. Molchanova and B. Y. Tarasov, ibid. 1 (1965) 5.
D. M. Gezovich and P. H. Geil, Polym. Eng. Sci. 8 (1968) 210.
M. Brose, Thesis, University of Duisburg (1991).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wenig, W. Ageing effects during isothermal crystallization of polypropylene blended with elastomers. Journal of Materials Science 29, 4708–4712 (1994). https://doi.org/10.1007/BF00356513
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00356513