Thermal-Mechanical Properties of Recycled PVC Used in Schrader Valve Caps

Abstract

The living conditions force man to use synthetic polymers, called plastics. Their resistance to decomposition by humidity generates their accumulation in sanitary landfills. The polyvinyl chloride (PVC) has remarkable physical-mechanical characteristics and low cost, therefore, it is used to manufacture pipes and containers for medical supplies, toiletries and cosmetics. Thermal characterization of post-consumer flexible PVC from mechanically recycled talcum containers is analyzed to manufacture valve caps for automotive tires. Thermal tests are performed in the INNER laboratory according to ASTM 1131, D2240, E1269–11, D1525, D3418, D79208 standards by infrared spectroscopy to identify the material and its percentage in the composition, differential scanning calorimetry to determine thermal degradation, glass transition temperature and its mechanical properties are based on the ASTM D38–02 standard. Results that will be used for the elaboration of a valve cap prototype by gravity casting of PVC in a polyester resin mold.