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Cationic grafting from carbon black. III. Grafting of polyesters from carbon black by ring‐opening polymerization of lactones initiated by CO + ClO 4 − groups on carbon black
Author(s) -
Tsubokawa Norio
Publication year - 1985
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.1985.070300521
Subject(s) - cationic polymerization , grafting , carbon black , polymerization , polymer chemistry , polyester , ring opening polymerization , carbon fibers , chemistry , materials science , organic chemistry , polymer , composite material , natural rubber , composite number
It was found that the cationic ring‐opening polymerization of δ‐valerolactone (VL), ε‐caprolactone (CL), and β‐propiolactone (PL) was initiated by carbon black containing CO + ClO 4 −groups, which were introduced by the reaction of COCl groups with AgClO 4 . The polyester was propagated from CO + ClO 4 −groups and effectively grafted onto carbon black surface. The polymerizability of these lactones by CO + ClO 4 −groups decreased in the following order: VL > CL > PL. The increasing temperature of the polymerization caused an increase in the rate of the chain transfer reaction of the growing chains and brought about the decrease of grafting ratio of polyester onto carbon black.