Synthesis and characterization of a novel mid-chain macrophotoinitiator of polyacrylonitrile by Ce(IV)/HNO3 redox system
Journal of Polymer Science, Part A: Polymer Chemistry, cilt.46, sa.16, ss.5404-5413, 2008 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 46 Sayı: 16
- Basım Tarihi: 2008
- Doi Numarası: 10.1002/pola.22860
- Dergi Adı: Journal of Polymer Science, Part A: Polymer Chemistry
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.5404-5413
- Anahtar Kelimeler: Block copolymers, Macrophotoinitiator, Photopolymerization, Polyacrylonitrile, Redox polymers
- Ankara Hacı Bayram Veli Üniversitesi Adresli: Evet
Özet
The polymerization of acrylonitrile initiated by cerium(IV) ammonium nitrate in combination with dihydroxy functional photoinitiator namely, 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl propan-1-one (HE-HMPP), Irgacure 2959, has been investigated in aqueous nitric acid. A novel mid-chain macrophotoinitiator of polyacrylonitrile (PAN) was obtained. The effects of acrylamide (AAm), HE-HMPP, Ce(IV), and HNO3 concentrations and temperature on the polymerization rate, monomer conversion, and intrinsic viscosities were investigated. The photodegradation and IR, H NMR, UV, and fluorescence spectroscopic studies revealed that PAN with desired photoinitiator functionality in the middle of the chain was obtained. The obtained PAN was used as prepolymer for photoinduced free radical polymerization of methyl methacrylate (MMA) and AAm to produce block copolymers. © 2008 Wiley Periodicals, Inc.