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Issue 3, 2012
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Polymers with molecular weight dependent LCSTs are essential for cooperative behaviour

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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.

Graphical abstract: Polymers with molecular weight dependent LCSTs are essential for cooperative behaviour

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Supplementary files

Article information


Submitted
21 Dec 2011
Accepted
10 Jan 2012
First published
23 Jan 2012

Polym. Chem., 2012,3, 794-799
Article type
Paper

Polymers with molecular weight dependent LCSTs are essential for cooperative behaviour

N. S. Ieong, M. Hasan, D. J. Phillips, Y. Saaka, R. K. O'Reilly and M. I. Gibson, Polym. Chem., 2012, 3, 794
DOI: 10.1039/C2PY00604A

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