Performance and Migration Stability of PVC Plasticized with Poly(ethylene glycerol sebacate) ^†

PVC (Bashkir Soda Company Caustic JSC, Sterlitamak, Russia) occupies a leading position among thermoplastics in terms of production and application. PVC is mainly used in the form of plasticized products. The search for alternatives to phthalate plasticizers remains an urgent task, with priority given to materials with low toxicity and migration resistance. Saturated polyesters based on sebacic acid are a promising eco-friendly substitute. The development of PVC materials with such polyesters solves the problems of environmental safety, durability of products and compliance with international standards. Plasticization of polyvinyl chloride was carried out with DOP (JSC Kamtex-Khimprom, Perm, Russia) and polyethylene glycerol sebacate containing terminal hydroxy and carboxyl groups, at 50 wt. h. and 10 wt. h, respectively, per 100 wt. h. PVC. The physico-chemical, technological and operational characteristics of plasticized PVC were determined. The tensile strength was 19.7 MPa, and the elongation of PVC plastics was determined at a closing rate of 100 mm/min—367%. The melt flow rate was determined using a plastometer (T = 190 °C, P = 98 H): MFI = 64.5 g/10 min. The thermal stability of the Congo red (185 °C) method was 209 min. The glass transition temperature was determined, via the DMA method, in the stretching mode, to be in the temperature range from minus 100 °C to plus 100 °C; when at a frequency of 1 Hz in a nitrogen atmosphere, this was −26.5 °C. An increase in the amount of polyester (20 wt. h.) was found to lead to increased resistance to migration to polar and nonpolar environments, with increased thermal stability—211 min, and MFI—188 g/min.