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Stable Vinyl Polyperoxide: Synthesis, Characteristics and Thermal Initiation Potentials of Poly(α‐phenylstyrene peroxide)
Author(s) -
Nanda Ajaya Kumar,
Kishore Kausal
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010701)202:11<2155::aid-macp2155>3.0.co;2-y
Subject(s) - polymer chemistry , polymerization , peroxide , copolymer , styrene , chemistry , polystyrene , thermal stability , activation energy , kinetics , radical polymerization , benzoyl peroxide , polymer , organic chemistry , physics , quantum mechanics
The stable vinyl polyperoxide, namely, poly(α‐phenylstyrene peroxide) (PAPSP), an alternating copolymer of α‐phenylstyrene and oxygen, has been synthesized by the oxidative polymerization of α‐phenylstyrene. It was characterized by 1 H and 13 C NMR, FT‐IR, DSC, GC‐MS and GPC studies. The overall activation energy ( E d ) for the degradation of PAPSP was found to be 45.0 kcal/mol. The stability of PAPSP was estimated from its isothermal degradation rate and compared with other related vinyl polyperoxides. Thermal initiating potentialities of PAPSP have been studied by polymerizing styrene at 80°C. The polymerization follows classical kinetics. The mechanism of polymerization has been discussed. The active polymer, which contains PAPSP segments in the polystyrene chain was confirmed by 1 H NMR study. The values of K 2 for PAPSP compared to that of 2,5‐dimethyl‐2,5‐dihydroperoxyhexane and di‐ tert ‐butyl peroxide at 80°C indicate that PAPSP can be used as an effective high temperature initiator.