Ethyl benzoate (EB), bis(2-ethyl hexyl) sebacate (BEHS), di-n-butyl phthalate (DNBP), and bis(2-ethyl hexyl) phthalate (BEHP) were employed as internal electron donors of heterogeneous Ziegler-Natta catalysts and the obtained polypropylene (PP) samples were fractionated by temperature rising elution fractionation (TREF). The influence of different internal donors on the tacticity distributions of PPs was compared. PPs have narrower tacticity distributions with aromatic esters. Based on TREF results, different interactions of internal donor, which may depend on their structures, were proposed. The effects of internal donors on microstructure of the fractions, especially the first fractions, were examined.
M. C. Sacchi, I. Tritto, and P. Locatelli, Prog. Polym. Sci., 16, 331 (1991) and reference therein.
C. B. Yang and C. C. Hsu, Polym. Bull., 30, 529 (1993).
C. B. Yang, C. C. Hsu, Y. S. Park, and H. F. Shurvell, Eur. Polym. J., 30, 205 (1994).
M. C. Sacchi, I. Tritto, C. Shan, and L. Noristi, Catalytic Olefin Polymerization, T. Keii and K. Soga, Ed., Kodansha, Tokyo, 1990, p 185.
K. Soga, T. Shiono, and Y. Doi, Makromol. Chem., 189, 1531 (1988).
L. Wang, L. X. Feng, J. T. Xu, and S. L. Yang, Chin. J. Polym. Sci., 13, 41 (1995).
J. T. Xu, L. X. Feng, S. L. Yang, Y. N. Wu, Y. Q. Yang, and X. M. Kong, Macromol. Rapid Commun., 17, 645 (1996).
M. Kioka, M. Makio, and A. Mizuno, Polymer, 35, 581 (1993).
G. Morini, E. Albizzati, G. Balbontin, I. Mingozzi, M. C. Sacchi, F. Forlini, and I. Tritto, Macromolecules, 29, 5770 (1996).
M. Kakugo, T. Miyotake, and Y. Natio, Macromolecules, 21, 341 (1988).
V. Busico, P. Corradini, L. De Martino, A. Proto, and E. Albizzati, Makromol. Chem., 187, 1115 (1986).
J. C. W. Chien, S. Weber, and Y. Hu, J. Polym. Sci., A: Polym. Chem. Ed., 27, 1499 (1989).
J. T. Xu, Y. Q. Yang, L. X. Feng, X. M. Kong, and S. L. Yang, J. Appl. Polym. Sci., 62, 727 (1996).
J. T. Xu, L. X. Feng, and S. L. Yang, Macromolecules, 30, 2539 (1997).
V. Busico, P. Cipullo, and P. Corradini, Macromolecules, 27, 4521 (1994).
J. T. Xu, L. X. Feng, S. L. Yang, Y. Q. Yang, and X. M. Kong, Eur. Polym. J., accepted.
About this article
KOBUNSHI RONBUNSHU (2011)
Journal of Applied Polymer Science (2008)
Acta Polymerica Sinica (2006)
Stepwise polymerization of propylene and ethylene with Cr(acetylacetonate)3/MgCl2-ethylbenzoate/diethylaluminium chloride catalyst system
Polymer International (2003)
Characterization of the Microstructure of Biaxially Oriented Polypropylene Using Preparative Temperature-Rising Elution Fractionation
International Journal of Polymer Analysis and Characterization (2003)