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Polymers with molecular weight dependent LCSTs are essential for cooperative behaviour

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Ieong, Nga Sze, Hasan, Muhammad, Phillips, Daniel J., Saaka, Yussif, O'Reilly, Rachel K. and Gibson, Matthew I.. (2012) Polymers with molecular weight dependent LCSTs are essential for cooperative behaviour. Polymer Chemistry, Vol.3 (No.3). pp. 794-799. ISSN 1759-9954

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Abstract

The potential to fine-tune the transition temperatures of polymers displaying lower-critical solution temperatures (LCST) by a simple mixing strategy is investigated. Using a panel of four distinct polymer classes (poly[oligo(ethyleneglycol)methacrylate], poly(N-vinylpiperidone), poly(N-vinylcaprolactam) poly(N-isopropylacrylamide)) it was shown that only those with strong molecular weight dependent LCSTs produced a single, cooperative, transition when blended together. Furthermore, the actual transition temperature was linked to the weight average not the number average molecular weight. The only polymer which did not show strong molecular-weight-LCST correlation was poly(oligo(ethyleneglycol)methacrylate), which showed two independent transitions, one for each polymer.

Item Type: Journal Article
Divisions: Faculty of Science > Chemistry
Journal or Publication Title: Polymer Chemistry
Publisher: Royal Society of Chemistry
ISSN: 1759-9954
Date: March 2012
Volume: Vol.3
Number: No.3
Page Range: pp. 794-799
Identification Number: 10.1039/c2py00604a
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
URI: http://wrap.warwick.ac.uk/id/eprint/42527

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