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Citation: Liu Jingjiang. SPHERULITIC GROWTH RATES AND MORPHOLOGY IN MALEIC ANHYDRIDE-g-POLYPROPYLENE[J]. Chinese Journal of Applied Chemistry, ;1993, 10(1): 25-29. shu

SPHERULITIC GROWTH RATES AND MORPHOLOGY IN MALEIC ANHYDRIDE-g-POLYPROPYLENE

Liu Jingjiang

1.
Changchun Institute of Applied Chemistry, Sinica, 130022 Changchun

Received Date: 17 September 1991
Available Online: 14 March 1992

The isothermal radial growth rates of spherulites and the morphology of maleic anhydride-g-polypropylene have been determined by means of polarizing microscope. Chain segments of maleic anhydride and polypropylene in the graft copolymer are partly compatible. A change in the growth region is observed at 132℃ and interpreted as a Region Ⅲ→Region Ⅱ transition, according to the kinetic theory of compatible polymer blend crystallization. The equilibrium melting temperature (T_m^o) of the graft copolymer was measured as 200℃, lower than that of ipp.
- maleic anhydride-g-polypropylene,
- graft copolymer,
- isothermal crystallization,
- spherulitic growth,
- equilibruim melting temperature
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