Abstract
This paper aims to design new aliphatic polyketones based on dimethylketene, by cationic polymerization. Previous works showed that the polyketone type of polydimethylketene presents excellent oxygen barrier properties even in the presence of humidity, enabling this material to compete with the polymers currently used in the food packaging industry. However, PDMK has a degradation temperature close to its melting temperature which may make processability uneasy. PDMK structure is thus modified to broaden the gap between these two temperatures: for the first time, a dimethylketene/ethylketene random copolymer and a star-shaped polydimethylketene are targeted by cationic polymerization. The obtained polymers are studied by 1H and 13C NMR, FTIR, and capillary viscosimetry, the thermal properties are more particularly analyzed by TGA and DSC, and the oxygen permeability is measured.
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