Viscoelasticity, Leachability, and Antimicrobial Activity of Poly(vinyl chloride) Blended with Benzyldimethyltetradecylammonium Bis(2-ethylhexyl) Sulfonatosuccinate

Abstract

Abstract Benzyldimethyltetradecylammonium (BA14+) salt with bis(2-ethylhexyl) sulfonatosuccinate (BEHS−) anion maintains its liquid state even at room temperature, so it can be regarded as a halogen-free low-volatile liquid material. In this study, the potential use of BA14BEHS as additive for poly(vinyl chloride) (PVC) has been investigated. The temperature dependence of the storage and loss moduli of PVC films blended with BA14BEHS showed a similar trend of that with a traditional plasticizer bis(2-ethylhexyl) phthalate. The glass transition temperature of the PVC films determined as the peak top temperature in loss modulus was lowered with increasing BA14BEHS content. The 10% BA14BEHS-blended PVC film was placed in contact with water and heptane, but BA14BEHS could not be detected from the aqueous and organic media. The results indicate that BA14BEHS can be applied as a plasticizer for PVC. Since BA14BEHS can be used to give textiles antimicrobial properties, the activity of the BA14BEHS-blended PVC film was assayed against Escherichia coli JM109. In spite of the low-leachability of BA14BEHS, the PVC film showed a significant antimicrobial activity.