Study of Trimellitic Acid Polyester for PVC Plasticizer

doi:10.19491/j.issn.1001-9278.2018.08.018

Abstract

Abstract: In this study, an ecological-friendly and biodegradable trimellitic acid polyester (P-Gl-TMAI) plasticizer was synthesized by the esterification and polycondensation reactions between trimellitic anhydride (TMA) and glycerin (GI). The as-prepared P-GI-TMAI was introduced into poly(vinyl chloride) (PVC) resin, and then the compatibility, mechanical properties and migration résistance of the resulting compounds were investigated. Moreover, the dioctyl phthalate (DOP) plasticizer as a reference was also used for a comparative investigation. Compared to DOP, P-GI-TMAI exhibited some small holes on the surface of test panel, indicating that P-GI-TMAI was more compatible with PVC. The PVC compound plasticized by P-GI-TMAI achieved the tensile strength of 18.99 MPa and elongation at break of 454.89 %. The results obtained from volatility and extraction tests indicated that there were only 3.02 % and 15.31 % of mass-loss rate for the compounds plasticized by P-GI-TMAI, indicating much better impact and migration resistance that those by DOP.

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