Synthesis and Characterization of Random and Block-Random Diblock Silylated Terpolymers via RAFT Polymerization

Minh Ngoc Nguyen1,*, Quang Trung Pham1, Van Dung Le2, Thi Bich Viet Nguyen3, Christine Bressy4 and André Margaillan4

1Faculty of Chemistry, VNU University of Science, 19 Le Thanh Tong, HoanKiem, Hanoi, Vietnam

2Military Medical University, 160 Phung Hung, Ha Dong, Hanoi, Vietnam

3Hanoi National University of Education, 136 Xuan Thuy, CauGiay, Hanoi, Vietnam

4Université de Toulon, Laboratoire Matériaux Polymères Interfaces Environnement Marin (MAPIEM EA 4323), 83957 La Garde, France

*Corresponding author: Fax: +84 24 38241140; Tel: +84 24 38253503; E-mail: nmngoc@hus.edu.vn

Abstract

Well-defined random and block-random diblock terpolymers consisting of methyl methacrylate (MMA), butyl acrylate (BA) and tert-butyldimethylsilyl methacrylate (t-BDMSMA) were successfully synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization using 2-cyanoprop-2-yl-dithiobenzoate (CPDB) as RAFT agent. 1H NMR and GPC analyses indicated the formation of random terpolymers [P(MMA-co-BA-co-t-BDMSMA)] and block-random diblock terpolymers [(PMMA-b-P(BA-co-t-BDMSMA) and Pt-BDMSMA-b-P(BA-co-MMA)] with good control of terpolymer composition, molecular weights and molecular weight distributions (Ð < 1.20). Thermal analysis results showed that the random terpolymers exhibited only one glass transition temperature (Tg) which depends on the terpolymer composition. The (PMMA-b-P(BA-co-t-BDMSMA) block-random diblock terpolymer showed two Tg that can be attributed to two blocks of terpolymer. Meanwhile, Pt-BDMSMA-b-P(BA-co-MMA) block-random diblock terpolymer exhibited only one Tg value, which is probably due to a low proportion of Pt-BDMSMA block present in the terpolymer.

Keywords

RAFT polymerization, Terpolymer, Trialkylsilyl methacrylate, Silylated polymer.

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