Polymers with molecular weight dependent LCSTs are essential for cooperative behaviour
Literature Information
Publication Date
2012-01-23
DOI
10.1039/C2PY00604A
Impact Factor
5.582
Authors
Nga Sze Ieong, Muhammad Hasan, Daniel J. Phillips, Yussif Saaka, Rachel K. O'Reilly, Matthew I. Gibson
View Original
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.
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Source Journal
Polymer Chemistry
CiteScore:
8.6
Self-citation Rate:
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