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- W2026353401 abstract "The thermal degradation of polypropylene in the presence of such vinyl polymers as polystyrene, polymethyl methacrylate, the 2-methyl-5-vinylpyridine-styrene copolymer, and the acrylonitrilestyrene copolymer has been studied at 280–345°C by the use of glass ampoules and an extruder. 1) The vinyl polymers added were effective as accelerators for the thermal degradation of polypropylene. The activation energies for the scission reaction of the polypropylene chain were 57.2 and 58.4 kcal./mol. for the two polypropylene samples, and 46.8, 43.5, 46.9 and 38.6 kcal./mol. for polypropylenes containing 3% polystyrene, 3% polymethyl methacrylate, 4.7% the acrylonitrilestyrene copolymer, and 3% the 2-methyl-5-vinylpyridine-styrene copolymer respectively. 2) The reaction time needed for the modification of polypropylene to an appropriate intrinsic viscosity by the use of an extruder is shorter than that in glass ampoules. 3) Graft or block polymers have been detected in the residue after the acetone-extraction of th..." @default.
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- W2026353401 date "1965-12-01" @default.
- W2026353401 modified "2023-09-25" @default.
- W2026353401 title "Studies on Reactions of Polypropylene. V. On the Thermal Degradation Accelerated by Vinyl Polymers" @default.
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- W2026353401 doi "https://doi.org/10.1246/bcsj.38.2045" @default.
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