Study of Coffee Grounds Oil Action in PVC Matrix Exposed to Gamma Radiation: Comparison of Systems in Film and Specimen Forms
AUTOR(ES)
Silva, Lindomar Avelino da, Almeida, Tainá Medeiros Bastos de, Teixeira, Rebeca Valgueiro, Araújo, Elmo Silvano de, Aquino, Kátia Aparecida da Silva
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
18/12/2017
RESUMO
The 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.
Documentos Relacionados
- Risk of thyroid nodules in subjects occupationally exposed to radiation: a cross sectional study.
- Risk of thyroid nodules in subjects occupationally exposed to radiation: a cross sectional study.
- Degradation studies on plasticized PVC films submited to gamma radiation
- Morphofunctional evaluation of human skin preserved in glycerol and exposed to gamma radiation: a study in athymic mice
- Production and Characterization of the Bio-Oil Obtained by the Fast Pyrolysis of Spent Coffee Grounds of the Soluble Coffee Industry