The dynamic mechanical properties of sulfonated styrene (PSSA) and styrene-co-methacrylate (PSMA) ionomers containing 30 wt% of fatty acid obtained from soybean oil were investigated. It was observed that when the fatty acid was added to the PSSA ionomer of low ion content, the ionic modulus increased slightly, but the cluster Tg decreased significantly.  On the other hand, for the PSSA ionomer of high ion content, the ionic modulus increased further and the cluster Tg also increased but still much lower than that for the ionomer of low ion content. In the case of PSMA ionomer of low ion content, the addition of fatty acid increased ionic modulus but decreased the cluster Tg.  For PSMA ionomer of high ion content, the ionic modulus and well as cluster Tg decreased drastically. The above findings indicated that the plasticization effects depended on the type and amounts of ionic groups.

Plasticization effects of various fatty acids on the mechanical properties of styrene ionomers

247th National Meeting (2014)

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