Photoinitiated curing of mono- and bifunctional Epoxides by combination of active chain end and activated monomer cationic polymerization methods

SANGERMANO M., TAŞDELEN M. A., Yagci Y.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, cilt.45, sa.21, ss.4914-4920, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 45 Sayı: 21
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1002/pola.22239
  • Dergi Adı: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.4914-4920
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

Photoinitiated cationic polymerization of mono- and bifunctional epoxy monomers, namely cyclohexeneoxide (CHO), 4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate (EEC), respectively by using sulphonium salts in the presence of hydroxylbutyl vinyl ether (HBVE) was studied. The real-time FTIR spectroscopic, gel content determination, and thermal characterization studies revealed that both hydroxyl and vinyl ether functionalities of HBVE take part in the polymerization. During the polymerization, HBVE has the ability to react via both active chain end (ACE) and activated monomer mechanisms through its hydroxyl and vinyl ether functionalities, respectively. Thus, more efficient curing was observed with the addition of HBVE into EEC-containing formulations. It was also demonstrated that HBVE is effective in facilitating the photoinduced crosslinking of monofunctional epoxy monomer, CHO in the absence of a conventional crosslinker. (c) 2007 Wiley Periodicals, Inc.