INFLUENCE OF THE PENTAERYTHRITOL ESTER OF OIL ACID ON COMPATABILITY OF OCTYLPHENOXYPROPYL PHTHALATE WITH POLYVINYL CHLORIDE
Various chemical additives are used for polyvinyl chloride (PVC) processing. Plasticization is one of the ways to improve the physical and mechanical PVC materials properties and simplify processing of polymer into the corresponding products. Today certain requirements to PVC-based compositions for environmental compatibility and manufacturability are increasing. Therefore, there is a need to develop new modern plasticizers and enlarge the assortment of them. This paper presents the results of research devoted to the compatibility of a new plasticizer, octylphenoxypropyl phthalate with PVC, with and without addition of pentae-rythritol ester of butyric acid. The PVC plasticizers compatibility was evaluated by the critical PVC dissolution temperature in the plasticizer and Shore A du-rometer hardness change in comparison with the industrial plasticizer dioctyl phthalate. The plasticizer influence on the flow temperature and the glass transition temperature has also been studied. It was marked that the studied octylphenoxypropyl phthalate as a plasticizer with the addition of pentaerythritol ester of butyric acid possesses sufficiently high plasticizing ability and it is well combined with PVC.