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Title: Synthesis of block copolymers using poly(methyl methacrylate) with unsaturated chain end through kinetic studies
Authors: Chang, Jun Jie
Niino, Hiroshi
Chatani, Shunsuke
Goto, Atsushi
Keywords: Science::Chemistry
Issue Date: 2019
Source: Chang, J. J., Niino, H., Chatani, S., & Goto, A. (2019). Synthesis of block copolymers using poly(methyl methacrylate) with unsaturated chain end through kinetic studies. Polymer Chemistry, 10(41), 5617-5625. doi:10.1039/c9py01367a
Journal: Polymer Chemistry
Abstract: A poly(methyl methacrylate) (PMMA) with an unsaturated chain end (PMMA–Y) was used as a macroinitiator in the polymerizations of several monomers to generate block copolymers via addition–fragmentation chain transfer (AFCT). PMMA–Y also worked as a macromonomer to generate branched polymers via propagation. A kinetic study revealed that the occurrence of AFCT and propagation significantly depends on temperature in the styrene polymerization; namely, while propagation was predominant below 60 °C as previously reported, AFCT was predominant at elevated temperatures such as 120 °C as newly revealed in the present work. This new kinetic finding opened up an efficient synthesis of block copolymers of PMMA with polystyrene at an elevated temperature. AFCT was also predominant over propagation in the polymerizations of acrylonitrile and acrylates. Thus, block copolymers of PMMA with polyacrylonitrile and functional polyacrylates were successfully obtained. The polymerization was controlled using iodine transfer polymerization (ITP) for styrene and reversible complexation mediated polymerization (RCMP) for the other monomers. PMMA–Y with different molecular weights were also tested. This approach to obtain block copolymers is practically attractive for the ease of operation.
ISSN: 1759-9954
DOI: 10.1039/c9py01367a
Schools: School of Physical and Mathematical Sciences 
Rights: © 2019 The Author(s). All rights reserved. This paper was published by The Royal Society of Chemistry in Polymer Chemistry and is made available with permission of The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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