The Effects of Prepolymerization on Propylene Polymerization with Mg(OC2H5)2-Supported Catalyst

Eui-Yeon Yu; Byung-Ryul Choi

Journal of Industrial and Engineering Chemistry, Vol.2, No.1, 7-17, June, 1996

Dept. of Chem. Eng., Chonnam Nat'l Univ., Kwangju 500-757, Korea
¹Daeduk Research Institute, Honam Petrochemical Co., Taejeon 305-343, Korea

Prepolymerization with Mg(OC₂H₅)₂/phenyl triethoxy silane (PTES)/TiCl₄/diisobutyl phthalate (DIBP)-Al(C₂H₅)₃/PTES catalyst system was carried out under conditions of relatively low temperature and low pressure for a short time before the main polymerization. The effects of prepolymerization on the yield, tacticity and morphology of polypropylene were examined under various prepolymerization conditions using propylene as the prepolymerization monomer. prepolymerization improved polymer morphology and enhanced the yield and isotactic index (Ⅰ.Ⅰ.). To obtain high performance polymers such as high-modulus polypropylene (HMPP), two-stage polymerization and prepolymerization using vinyl cyclohexane (VCH) and divinyl benzene (DVB) as the prepolymerization monomer were also investigated.

[References]

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Tait PJT, Catalyst Design for Tailor-made Polyolefins, K. Soga (ed.), p. 55, Kodansha, Tokyo (1994)
Sato A, Kiuta K, Matsuda K, Uwai T, Hanari T, U.S. Patent, 4,514,513 (1985)
Sato A, Uwai T, Tachibana M, Matuda K, Hibuchi Y, U.S. Patent, 4,603,184 (1986)
Yamabe M, Kodama S, Kojima G, U.S. Patent, 4,368,308 (1983)
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Kikuta K, Tachibana M, Sata A, U.S. Patent, 4,363,901 (1982)
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Chiba H, Obama K, Kawazoe S, Oka T, Satoh A, U.S. Patent, 4,510,292 (1985)
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Tohru H, Ichiro N, Kinya M, Hiromasa C, Klyoshi M, European Patent, 277,541 (1988)
Coutinho FMB, Costa MAS, SantaMaria LC, Bruno JC, Appl. Polym. Sci., 51, 1029 (1994)
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Gates BC, Kaitier JR, Schumit GCA, Chemistry of Catalytic Process, p. 150, McGraw-Hill, New York (1980)
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Keii T, Suzuki E, Tamura M, Doi Y, Transition Metal Catalyzed Polymerizations, R.P. Quirk(ed.), Part A, p. 97, Harwood, Academic, New York (1982)
Goodall BL, Transition Metal Catalyzed Polymerizations, R.P. Quirk (ed.), Part A, p. 355, Harwood Academic, New York (1982)
Tang S, Catalytic Polymerization of Olefins, T. Keii(ed.), p. 165, Kodansha, Tokyo (1986)

[Related Articles]

[1] Karol FJ, Wagner BE, Levine IJ, Goeke GL, Noshay A, Advnaces in Polyolefins, p. 337, Prenum, New York (1987)

[2] Tait PJT, Catalyst Design for Tailor-made Polyolefins, K. Soga (ed.), p. 55, Kodansha, Tokyo (1994)

[3] Sato A, Kiuta K, Matsuda K, Uwai T, Hanari T, U.S. Patent, 4,514,513 (1985)

[4] Sato A, Uwai T, Tachibana M, Matuda K, Hibuchi Y, U.S. Patent, 4,603,184 (1986)

[5] Yamabe M, Kodama S, Kojima G, U.S. Patent, 4,368,308 (1983)

[6] Xu Z, Zhu Q, Feng L, Yang S, Makromol. Chem. Rapid Commun., 11, 79 (1990)

[7] Kikuta K, Tachibana M, Sata A, U.S. Patent, 4,363,901 (1982)

[8] Chiba H, Oka T, U.S. Patent, 4,771,103 (1988)

[9] Chiba H, Obama K, Kawazoe S, Oka T, Satoh A, U.S. Patent, 4,510,292 (1985)

[10] Kitagawa S, Okada I, U.S. Patent, 4,366,296 (1982)

[11] Tohru H, Ichiro N, Kinya M, Hiromasa C, Klyoshi M, European Patent, 277,541 (1988)

[12] Coutinho FMB, Costa MAS, SantaMaria LC, Bruno JC, Appl. Polym. Sci., 51, 1029 (1994)

[13] Namiki I, Kobunshi, 41, 407 (1992)

[14] Lee AK, Choi BR, Kwon JH, Huh YC, Korean Patent, 92-4804 (1992)

[15] Vogel AI, Quantitative Inorganic Analysis, p. 788, Longmana, London (1961)

[16] Gates BC, Kaitier JR, Schumit GCA, Chemistry of Catalytic Process, p. 150, McGraw-Hill, New York (1980)

[17] Tait PJT, Transition Metal Catalyzed Polymerizations, R.P. Quirk (ed.), Part A, p. 115, Horwood Academic, New York (1982)

[18] Keii T, Suzuki E, Tamura M, Doi Y, Transition Metal Catalyzed Polymerizations, R.P. Quirk(ed.), Part A, p. 97, Harwood, Academic, New York (1982)

[19] Goodall BL, Transition Metal Catalyzed Polymerizations, R.P. Quirk (ed.), Part A, p. 355, Harwood Academic, New York (1982)

[20] Tang S, Catalytic Polymerization of Olefins, T. Keii(ed.), p. 165, Kodansha, Tokyo (1986)