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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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Publication details

The article was received on 21 Dec 2011, accepted on 10 Jan 2012 and first published on 23 Jan 2012


Article type: Paper
DOI: 10.1039/C2PY00604A
Citation: Polym. Chem., 2012,3, 794-799

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    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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