Synthesis of block copolymers using poly(methyl methacrylate) with unsaturated chain end through kinetic studies
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 prop...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/137721 |
| _version_ | 1811688007792590848 |
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| author | Chang, Jun Jie Niino, Hiroshi Chatani, Shunsuke Goto, Atsushi |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Chang, Jun Jie Niino, Hiroshi Chatani, Shunsuke Goto, Atsushi |
| author_sort | Chang, Jun Jie |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T05:25:22Z |
| format | Journal Article |
| id | ntu-10356/137721 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:25:22Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1377212023-02-28T19:51:17Z Synthesis of block copolymers using poly(methyl methacrylate) with unsaturated chain end through kinetic studies Chang, Jun Jie Niino, Hiroshi Chatani, Shunsuke Goto, Atsushi School of Physical and Mathematical Sciences Science::Chemistry Block Copolymers Kinetic Studies 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. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2020-04-13T00:58:20Z 2020-04-13T00:58:20Z 2019 Journal Article 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 1759-9954 https://hdl.handle.net/10356/137721 10.1039/c9py01367a 2-s2.0-85074115789 41 10 5617 5625 en Polymer Chemistry © 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). application/pdf |
| spellingShingle | Science::Chemistry Block Copolymers Kinetic Studies Chang, Jun Jie Niino, Hiroshi Chatani, Shunsuke Goto, Atsushi Synthesis of block copolymers using poly(methyl methacrylate) with unsaturated chain end through kinetic studies |
| title | Synthesis of block copolymers using poly(methyl methacrylate) with unsaturated chain end through kinetic studies |
| title_full | Synthesis of block copolymers using poly(methyl methacrylate) with unsaturated chain end through kinetic studies |
| title_fullStr | Synthesis of block copolymers using poly(methyl methacrylate) with unsaturated chain end through kinetic studies |
| title_full_unstemmed | Synthesis of block copolymers using poly(methyl methacrylate) with unsaturated chain end through kinetic studies |
| title_short | Synthesis of block copolymers using poly(methyl methacrylate) with unsaturated chain end through kinetic studies |
| title_sort | synthesis of block copolymers using poly methyl methacrylate with unsaturated chain end through kinetic studies |
| topic | Science::Chemistry Block Copolymers Kinetic Studies |
| url | https://hdl.handle.net/10356/137721 |
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