alexa Bio- Based Co- Plasticizer for PVC in Addition with Epoxidised Soyabean Oil to Replace Phthalates
ISSN: 2319-9873

Research & Reviews: Journal of Engineering and Technology
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Research Article

Bio- Based Co- Plasticizer for PVC in Addition with Epoxidised Soyabean Oil to Replace Phthalates

Bhakti Mehta*, Mukesh Kathalewar, and Jitesh Mantri.

Department of Polymer & Surface Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai - 400019, Maharashtra, India

Corresponding Author:
Bhakti Mehta
Department of Polymer & Surface Engineering
Institute of Chemical Technology
Nathalal Parekh Marg, Matunga, Mumbai-400019, India.

Received: 26/08/2014; Revised: 12/09/2014; Accepted: 22/09/2014

 

Abstract

Studies showed that phthalate plasticizers are carciogenic. The concerns raised about toxicity led to a large demand of producing non- toxic and bio- based plasticizers. Currently, ESBO can only replace 30% DOP in the PVC formulations. We investigated benzyl ester (BE) synthesized by dehydrated castor oil fatty acid and benzyl alcohol in presence of catalyst at 170-180oC as plasticizer for poly(vinyl chloride) (PVC) to replace commercially used combination of plasticizer (di- octyl phthalate (DOP) and epoxidized soyabean oil (ESBO). The structure of the BE was confirmed by 1H NMR, FTIR, acid value, hydroxyl value. The modified plasticizer was used as plasticizer in PVC in different proportions for the replacement of DOP in samples prepared from PVC- DOP- ESBO combination, keeping ESBO proportion constant in all samples. The incorporation of BE displayed good plasticizing performance and also resulted in, reduction in viscosity and viscosity pick- up, improved mechanical, exudation, thermal degradation and chemical resistance properties (upto wt. 65%). The presence of BE showed reduction in whiteness index due to presence of conjugated double bonds in the structure. No variation in DSC and shore hardness properties was observed when compared to those of DOP plasticized sheets which can contribute to the conclusion that BE can be used as a co- plasticizer in PVC along with ESBO upto wt. 65% to replace DOP

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