Silva, Lindomar Avelino daAlmeida, Tainá Medeiros Bastos deTeixeira, Rebeca ValgueiroAraújo, Elmo Silvano deAquino, Kátia Aparecida da Silva2022-07-132022-07-132017SILVA, L. A. et al. Study of coffee grounds oil action in PVC matrix exposed to gamma radiation: comparison of systems in film and specimen forms. Materials Research, São Carlos, v. 20, n. suppl.2, p. 709-715, 2017.1980-5373http://dx.doi.org/10.1590/1980-5373-MR-2016-0985http://www.sbicafe.ufv.br/handle/123456789/13579The poly (vinyl chloride), PVC, undergoes changes in its physicochemical properties when it is exposed to gamma radiation. Thus, the radiolytic stabilization of PVC is one way for obtain a material with radiation resistance. In this work, we studied the coffee grounds oil as PVC radiolytic protection in two systems forms: PVC film and PVC specimen. The systems were irradiated at sterilization dose of medical devices and viscosity measurements were performed. According to viscosity assays of PVC films, there was a 67% protection in polymer matrix promoted by the oil. On the other hand, the mean viscosity molar mass (Mv) of PVC specimens increased about 13%, indicating predominance of crosslinking effect, however samples containing the oil showed no Mv significant changes. Therefore, the oil can be considered a PVC radio stabilizing substance and open a way for use of sustainable additive in PVC industry.pdfenOpen AccessSustainabilityAdditiveStabilizationPolymerCafeicultura::Resíduos e subprodutos do caféArtigo