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Issue 7, 2012
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Reactive triblock polymers from tandem ring-opening polymerization for nanostructured vinyl thermosets

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Abstract

Multiply functional hydroxyl telechelic poly(cyclooctene-s-5-norbornene-2-methylene methacrylate) was synthesized by ring opening metathesis (co)polymerization of cis-cyclooctene and 5-norbornene-2-methylene methacrylate using the second generation Grubbs catalyst in combination with a symmetric chain transfer agent bearing hydroxyl functionality. The resulting hydroxyl-telechelic polymer was used as a macroinitiator for the ring opening transesterification polymerization of d,l-lactide to form reactive poly(lactide)-b-poly(cyclooctene-s-5-norbornene-2-methylene methacrylate)-b-poly(lactide) triblock polymers. Subsequently, the triblocks were crosslinked by free radical copolymerization with several vinyl monomers including styrene, divinylbenzene, methyl methacrylate, and ethyleneglycol dimethacrylate. Certain conditions led to optically transparent thermosets with mesoscale phase separation as evidenced by small angle X-ray scattering, differential scanning calorimetry and transmission electron microscopy. Disordered, bicontinuous structures with nanoscopic domains were generated in several cases, rendering the samples attractive for size-selective membrane applications.

Graphical abstract: Reactive triblock polymers from tandem ring-opening polymerization for nanostructured vinyl thermosets

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Publication details

The article was received on 30 Sep 2011, accepted on 27 Oct 2011 and first published on 14 Nov 2011


Article type: Paper
DOI: 10.1039/C1PY00450F
Citation: Polym. Chem., 2012,3, 1827-1837
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    Reactive triblock polymers from tandem ring-opening polymerization for nanostructured vinyl thermosets

    M. A. Amendt, L. M. Pitet, S. Moench and M. A. Hillmyer, Polym. Chem., 2012, 3, 1827
    DOI: 10.1039/C1PY00450F

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