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Graft copolymerization of 4‐vinyl pyridine onto isotactic polypropylene hydroperoxide by mutual irradiation method
Author(s) -
Kaur Inderjeet,
Misra B. N.,
Barsola Raghuvir
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070480402
Subject(s) - tacticity , polypropylene , grafting , copolymer , polymer chemistry , materials science , pyridine , monomer , polymer , chemistry , polymerization , organic chemistry , composite material
An attempt has been made to graft copolymerize 4‐vinyl pyridine onto isotactic polypropylene hydroperoxide by mutual irradiation method in an aqueous medium. Polypropylene hydroperoxide has been prepared by irradiating recrystallized polypropylene beads from a Co 60 source in the presence of air. The resulting polypropylene hydroperoxide beads have been used as the backbone polymer and grafting of 4‐vinyl pyridine has been studied as a function of various reaction parameters. Optimum conditions for maximum percentage of grafting have been evaluated. Rate of grafting ( R g ) has been determined as a function of preirradiation dose and initial monomer concentration. Water has been found to affect percentage of grafting. The graft copolymers have been characterized by spectroscopic method and isolation of the grafted poly(4‐VP) from the graft copolymer. A plausible mechanism is proposed to explain the mutual grafting of 4‐vinyl pyridine onto polypropylene hydroperoxide. © 1993 John Wiley & Sons, Inc.