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“Living” free radical ring‐opening polymerization of 2‐methylene‐4‐phenyl‐1,3‐dioxolane by atom transfer radical polymerization
Author(s) -
Pan CaiYuan,
Lou XuDong
Publication year - 2000
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(20000701)201:11<1115::aid-macp1115>3.0.co;2-d
Subject(s) - polymerization , living free radical polymerization , ionic polymerization , chemistry , polymer chemistry , chain growth polymerization , radical polymerization , chain transfer , reversible addition−fragmentation chain transfer polymerization , living polymerization , cobalt mediated radical polymerization , ring opening polymerization , precipitation polymerization , methylene , photochemistry , polymer , organic chemistry
The “living” free radical ring‐opening polymerization of 2‐methylene‐4‐phenyl‐1,3‐dioxolane (MPDO) in the presence of ethyl α‐bromobutyrate/CuBr/2,2′‐bipyridine at various temperatures has been investigated. In comparison with the conventional ring‐opening polymerization of MPDO, a lower content of ring‐opened unit in the polymer was found. The results of ln[M] 0 /[M]) against polymerization time, ( M n ) th and ( M n ) NMR vs conversion, and GPC of the polymers are strongly indicative of the “living” polymerization process. Initiator efficiency was measured. The mechanism of polymerization, and the effect of pyridine on the polymerization mechanism were discussed.