Influencing the phase transition temperature of poly(methoxy diethylene glycol acrylate) by molar mass, end groups, and polymer architecture
- The easily accessible, but virtually overlooked monomer methoxy diethylene glycol acrylate was polymerized by the RAFT method using monofunctional, difunctional, and trifunctional trithiocarbonates to afford thermoresponsive polymers exhibiting lower critical solution temperature-type phase transitions in aqueous solution. The use of the appropriate RAFT agent allowed for the preparation and systematic variation of polymers with defined molar mass, end-groups, and architecture, including amphiphilic diblock, symmetrical triblock, and triarm star-block copolymers, containing polystyrene as permanently hydrophobic constituent. The cloud points (CPs) of the various polymers proved to be sensitive to all varied parameters, namely molar mass, nature, and number of the end-groups, and the architecture, up to relatively high molar masses. Thus, CPs of the polymers can be adjusted within the physiological interesting range of 2040 degrees C. Remarkably, CPs increased with the molar mass, even when hydrophilic end groups were attached to theThe easily accessible, but virtually overlooked monomer methoxy diethylene glycol acrylate was polymerized by the RAFT method using monofunctional, difunctional, and trifunctional trithiocarbonates to afford thermoresponsive polymers exhibiting lower critical solution temperature-type phase transitions in aqueous solution. The use of the appropriate RAFT agent allowed for the preparation and systematic variation of polymers with defined molar mass, end-groups, and architecture, including amphiphilic diblock, symmetrical triblock, and triarm star-block copolymers, containing polystyrene as permanently hydrophobic constituent. The cloud points (CPs) of the various polymers proved to be sensitive to all varied parameters, namely molar mass, nature, and number of the end-groups, and the architecture, up to relatively high molar masses. Thus, CPs of the polymers can be adjusted within the physiological interesting range of 2040 degrees C. Remarkably, CPs increased with the molar mass, even when hydrophilic end groups were attached to the polymers.…
MetadatenAuthor details: | Anna Miasnikova, André LaschewskyORCiDGND |
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DOI: | https://doi.org/10.1002/pola.26116 |
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ISSN: | 0887-624X |
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Title of parent work (English): | Journal of polymer science : A, Polymer chemistry |
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Publisher: | Wiley-Blackwell |
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Place of publishing: | Hoboken |
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Publication type: | Article |
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Language: | English |
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Year of first publication: | 2012 |
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Publication year: | 2012 |
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Release date: | 2017/03/26 |
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Tag: | LCST; diblock copolymers; reversible addition fragmentation chain transfer (RAFT); star-block copolymers; stimuli-sensitive polymers; triblock copolymers; water-soluble polymers |
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Volume: | 50 |
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Issue: | 16 |
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Number of pages: | 11 |
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First page: | 3313 |
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Last Page: | 3323 |
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Funding institution: | Deutsche Forschungsgemeinschaft DFG [SPP1259, LA611/7] |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
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Peer review: | Referiert |
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