Polypropylene-based graft copolymers via CuAAC click chemistry
Express Polymer Letters, cilt.12, sa.5, ss.418-428, 2018 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 12 Sayı: 5
- Basım Tarihi: 2018
- Doi Numarası: 10.3144/expresspolymlett.2018.35
- Dergi Adı: Express Polymer Letters
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.418-428
- Anahtar Kelimeler: Chlorinated polypropylene, Copper (i)-catalyzed azide-alkyne cycloaddition, Graft copolymers, Polymer synthesis, Water contact angle
- Trakya Üniversitesi Adresli: Evet
Özet
Graft copolymers from commercial chlorinated polypropylene (PP-Cl) possessing either poly(ethylene glycol) (PEG) or poly(ɛ-caprolactone) (PCL) grafts are synthesized by copper (I)-catalyzed azide-alkyne cycloaddition ‘click’ reaction (CuAAC). For this purpose, azido-functional polypropylene is prepared by nucleophilic substitution of chlorine groups of PP-Cl with azidotrimethylsilane-tetrabutylammonium fluoride. Whereas, the clickable alkyne end-functional PEG and PCL are independently synthesized by esterification reaction of poly(ethylene glycol) methyl ether with 4-pentyonic acid at room temperature and ring-opening polymerization of e-caprolactone using stannous octoate as catalyst and propargyl alcohol as initiator. Finally, the corresponding graft copolymers, PP-g-PEG and PP-g-PCL, with different surface properties were successfully synthesized by CuAAC ‘click’ reaction under mild condition. Spectral, chromatographic and thermal analyses at various stages prove the formation of desired polypropylene-based graft copolymers with well-defined properties. Furthermore, the water contact angle values of PP-Cl, PP-g-PEG and PP-g-PCL are found as 90±1°, 78±1.8° and 83±2.1°, respectively.