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B. Świerz-Motysia, J. Kozakiewicz, J. Przybylski, J. Pełka


The performance of some monomeric and polymeric plasticizers in PVC.

RAPID COMMUNICATION (in English)

Polimery 1999, No 11-12, 780


DOI: dx.doi.org/10.14314/polimery.1999.780


Summary

High- and medium-M polymeric plasticizers were studied to partly replace di-2-ethylhexyl phthalate (DEHP) as plasticizers for PVC. They included tri-2-ethylhexyl trimellitate (TOTM), novel semisolid polyester-urethanes and polysiloxane-urethanes (PU) synthesized at ICRI, endowed with special structures and various average molecular weights (M). Two series of PVC compositions were examined: (i) flexible (78}2 Shore A), plasticized with DEHP/TOTM, DEHP/polyester-urethane, DEHP/polysiloxane-urethane, and DEHP alone; and (ii) semirigid (89}2 Shore A) plasticized with DEHP/polyester-urethane type plasticizers (M = 2000-12000) and polyester. Mechanical property data were measured and compared with those recorded for the PVC compositions plasticized with DEHP alone or polyester only. The DEHP/TOTM and the DEHP/PU binary plasticizer systems gave rise viz., the former to improved aging resistance and thermal stability at elevated temperature (Table 3) and the latter to enhanced resistance to extraction into hydrocarbons and into oils and to suppressed migration to rigid PVC.


Keywords: novel semisolid polyester-urethane plasticizers, di-2-ethylhexyl phthalate, tri-2-ethylhexyl trimellitate, chemical, mechanical and thermal properties of plasticized PVC compositions

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