Method for increasing molecular weight of syndiotactic...

Details Method for increasing molecular weight of syndiotactic... Method for increasing molecular weight of syndiotactic...

C - Chemistry, Metallurgy

08

J

204/91.72

C08J 3/28 (2006.01) C08F 2/46 (2006.01) C08F 8/00 (2006.01)

Patent

CA 2040226

A method for increasing the molecular weight of polypropylene having a substantially syndiotactic structure is disclosed which comprises the step of irradiating the syndiotactic polypropylene with radiation in the absence of oxygen. After the irradiation, the polypropylene is preferably heated. Furthermore, the polypropylene having the substantially syndiotactic structure which remains in a melting state can be irradiated with radiation. The polypropylene having the substantially syndiotactic structure is preferably polypropylene in which any diffraction line is not substantially observed in a spacing of about 7.1 .ANG. by X- ray diffraction.

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