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Surface free energy analysis of poly N vinyl 2 pyrrolidone crotonic acid copolymers prepared by Gamma ray induced polymerization technique    
Yazarlar
Tuncer Çaykara
Gazi Üniversitesi, Türkiye
Prof. Dr. Zekeriya YERLİKAYA
Gazi Üniversitesi, Türkiye
Kantoğlu Ömer
Özet
Pure poly(N-vinyl-2-pyrrolidone) (PVP) and P(VP-crotonic acid) [P(VP/CrA)] copolymers with different CrA contents were prepared by the γ-ray-induced polymerization technique. The change in the surface free energy of the copolymers was investigated using the Van Oss-Good contact angle evaluation methodology in order to estimate their wettability properties. The apolar Lifshitz-van der Waals component (γSLW) and the electron donor component (γs-) of the PVP network were calculated as 27.6 and 56.5 mN m-1, respectively. In this case, the surface of the PVP network had a basic character (electron donor). By contrast, the γSLW component of P(VP/CrA) copolymers increased and then remained almost constant with increasing CrA content. In addition, the surface of these copolymers changed from a basic character (γS- = 56.5 mN m-1) to an acidic character (γS+ = 0.07 mN m-1) with increasing CrA contents in the copolymer.
Anahtar Kelimeler
surfaces,radiation,poly(N-vinyl-2-pyrrolidone-crotonic acid),networks
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Journal of Applied Polymer Science
Dergi ISSN 0021-8995
Dergi Tarandığı Indeksler SCI
Makale Dili İngilizce
Basım Tarihi 02-2004
Cilt No 91
Sayı 3
Sayfalar 1893 / 1897
Doi Numarası 10.1002/app.13245
Makale Linki http://doi.wiley.com/10.1002/app.13245