Synthesis and characterization of the block copolymers using the novel bifunctional initiator by RAFT and FRP technics: evaluation of the primary polymerization parameters

Springer Science and Business Media LLC - Tập 27 - Trang 1-7 - 2020
Temel Öztürk1, Bedrettin Savaş2, Ergül Meyvacı1, Ali Kılıçlıoğlu1, Baki Hazer3,4
1Department of Chemistry, Faculty of Arts and Sciences, Giresun University, Giresun, Turkey
2Kars Vocational School, Kafkas University, Kars, Turkey
3Department of Aircraft Airframe Engine Maintenance, Kapadokya University, Ürgüp, Turkey
4Department of Nano Technology Engineering, Zonguldak Bülent Ecevit University, Zonguldak, Turkey

Tóm tắt

Synthesis of poly(styrene-b-methyl methacrylate) block copolymers were obtained via reversible addition-fragmentation chain transfer (RAFT) polymerization of styrene using RAFT-macro agent. For this purpose, 4-bromomethyl benzoyl chloride was obtained using 4-methylbenzoyl chloride and N-bromosuccinimide. The mono functional bromomethyl benzoyl t-butyl peroxy ester (t-BuBP) was obtained by reaction of 4-bromomethyl benzoyl chloride with t-butyl hydroperoxide. Terminally brominated poly(methyl methacrylate) (PMMA-Br) was synthesized using t-BuBP and methyl methacrylate via free-radical polymerization. RAFT-macro agent was acquired by reaction of PMMA-Br and potassium ethyl xanthogenate. By reacting RAFT-macro agent and styrene, block copolymers were obtained. The primary parameters, for example concentration, and time that affect reaction were evaluated. The products were characterized by FT-IR, 1H-NMR, GPC, and TGA. The multi instruments studies of the obtained block copolymers show that the copolymers easily formed as a result of RAFT. Mn,GPC values of the copolymers were between 24,900 g.mol−1 and 74,100 g.mol−1.

Tài liệu tham khảo

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