Diester based on castor oil fatty acid as plasticizer for poly(vinyl chloride)

ABSTRACT Castor oil is a renewable resource that has potential uses as an environmental friendly material for a range of applications. In recent years, much efforts have been driven to develop alternate plasticizer for medical and commodity plastics due to growing concerns about dioctyl phthalate (D...

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Bibliographic Details
Published in:Journal of applied polymer science 2014-06, Vol.131 (11), p.np-n/a
Main Authors: Mehta, Bhakti, Kathalewar, Mukesh, Sabnis, Anagha
Format: Article
Language:English
Subjects:
Applied sciences
biopolymers and renewable polymers
Castor oil
Chlorides
Compounding ingredients
Diesters
Differential scanning calorimetry
Dopants
Exact sciences and technology
Fatty acids
Materials science
plasticizer
Plasticizers
poly(vinyl chloride)
Polymer industry, paints, wood
Polymers
Polyvinyl chlorides
synthesis and processing
Technology of polymers
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Summary:ABSTRACT Castor oil is a renewable resource that has potential uses as an environmental friendly material for a range of applications. In recent years, much efforts have been driven to develop alternate plasticizer for medical and commodity plastics due to growing concerns about dioctyl phthalate (DOP) for flexible poly(vinyl chloride) (PVC). In this study, a bio‐based plasticizer was synthesized by a two‐step esterification reaction of castor oil fatty acid (COFA) with benzyl alcohol and octanoic acid in the presence of catalyst (dibutyl tin dilaurate). The structure of the octanoic ester (OE) was confirmed by proton nuclear magnetic resonance, Fourier transform infrared spectroscopy, acid value, and hydroxyl value. OE was used as a coplasticizer in PVC for partial replacement of DOP. The addition of OE exhibited good incorporation and plasticizing performance in the PVC sheets. Incorporation of OE resulted in good plasticizing, tensile strength, percentage elongation, exudation, thermal stability, and chemical resistance because of the presence of long carbon chains of COFA. Differential scanning calorimetry (DSC), thermogravimetric analysis, and color measurements were also performed to evaluate the effect of OE. With the increase in OE, DSC and hardness results showed marginal deviation from those obtained for DOP‐plasticized sheets. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40354.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.40354