Effect of plasticizer blend on properties of flexible PVC compound

Abstract

Generally, plasticizer has been used to improve flexible property of PVC compound, however the plasticizer can migrate into various medium that come in contact with the PVC compound and can cause severe variation of the mechanical performance of the end products, This research studied effect of plasticizer blend using DOP and chlorinated paraffin on the mechanical pro0perties of flexible PVC compound in six formulations by using as a standard, a formulation of flexible PVC compound which has a formulation of flexible PVC compound which has a hardness value of 80A. The ecperiments involved the immersion of specimens in various oils at 70℃ and 120℃ for 2,4,24 and 48 hours to study the effect of effect of temperature and time on the migration of plasticizer blend. Also, this effect of plasticizer migration on the physical property such as hardness and mechanical properties was studied. The results showed that the migration of plasticizers increased with time and temperature. The hardness of each specimen increased because of the lost of plasticizers. The migration of plasticizers of Formulation 2, which the ratio of DOP and chlorinated paraffin at 45:5 , was less than other ratios and the flame retardant of this formulation was slightly increased.