Aliphatic polyketone obtained by cationic polymerization of ethylketene

Polymer Chemistry Pub Date: 2011-07-29 DOI: 10.1039/C1PY00199J

Abstract

For the first time, ethylketene, synthesized by thermolysis of butyric anhydride, was polymerized cationically in order to obtain a novel aliphatic polyketone. Initiated by Lewis acid initiator AlBr3, this polymerization was undertaken in different solvents and at ?78 °C (top polymerization yield of 57% in toluene). 1H-13C HSQC NMR experiments clearly demonstrated the polyketonic microstructure. The thermal properties of this new polymer were analyzed by DSC, TGA and X-ray diffraction: with a glass transition temperature around 70 °C and an average crystallinity of 0.34, this polymer showed a starting degradation temperature near 210 °C.

Graphical abstract: Aliphatic polyketone obtained by cationic polymerization of ethylketene
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