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Phosphonic acid esters as thermally latent initiatiors: Initiation process in the polymerization of glycidyl phenyl ether
Author(s) -
Kim Moonsuk,
Sanda Fumio,
Nakamura Yoshiyuki,
Endo Takeshi
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(20000901)201:14<1691::aid-macp1691>3.0.co;2-j
Subject(s) - cationic polymerization , chemistry , polymerization , polymer chemistry , ether , alkyl , living cationic polymerization , polymer , ring opening polymerization , organic chemistry
The initiating species of phosphonic acid esters serving as thermally latent initiators was investigated in the cationic polymerization of glycidyl phenyl ether (GPE). O,O ‐Di‐ t ‐butyl phenylphosphonate ( 1 H ) dissociated into phenylphosphonic acid and isobutene on heating to 150°C. 2 H NMR spectroscopic study was carried out to examine the alkyl initiating species in the cationic polymeriaztion of GPE with O,O ‐di‐ t ‐butyl‐ d 9 phenylphosphonate ( 1 D ) in the presence of ZnCl 2 . A signal based on the t ‐butyl‐ d 9 group was observed in the obtained polymer. The cationic polymerization of GPE with phosphonic acid was carried out to examine the proton initiating species at 170°C. GPE was converted quantitatively to the corresponding. It was suggested that both the alkyl cation and the proton serve as the initiating species in the cationic polymerization of GPE.