Influence of alternative polymeric plasticizer to DOP in thermal and dynamic-mechanical properties of PVC

Abstract

Polyvinyl chloride (PVC) is a very versatile polymer with many applications. Due to the easy incorporation of additives and plasticizers in this resin. The most used plasticizer for PVC is dioctyl phthalate (DOP), however its use has been restricted by several organizations because it presents potential toxicity. In this way, the objective of this work is to evaluate thermal, physical and dynamic-mechanical characteristics for a polymeric plasticizer alternative to DOP, polyisobutene base. As a method of comparison, the contents of the materials were kept constant, and only the plasticizer content of the samples was altered. Results indicated that the PVC compounds obtained satisfactory plasticizing results and that don't have chemical transformations. In addition, the plasticizer evaluated has a higher thermal stability when compared to the compound with DOP, proving to be a promising result.

Determination of Optimal Concentration of the Plastifier (DIDP) for a PVC/ DIDP Industrial Formulation

“…It can be seen that the blend containing 45 wt % of DIDP the time of degradation is maximal and equal to 155 minutes. Table 2 shows clearly that the 45 wt % DIDP based blend is the more thermally stable since it presents the maximal dehydrochloration duration; this is due to the high degradation resistance of the interpenetrated PVC chains between DIDP molecules and also to the reduction of the diffusion rates of volatiles out of the material [7].…”