The Utilization Of Thermal Analysis Techniques For The Evaluation Of EPDM Roofing Membrane Materials

The study was designed to provide data on the possibility of using the thermal analysis (TA) methods to aid in the characterization of roofing membrane materials. The materials studied are not typically covered by thermal analysis. They used thermogravimetry, differential scanning calorimetry and dynamic mechanical analysis. Three black (carbon black filled) three white (titanium dioxide pigmented), and one white on black laminate Ethylene propylene diole terpolymer (EPDM) membranes were examined prior to and following exposure to heat, the UV and ozone conditions as described within ASTM D 4637, as well as to the outdoor exposure. To compare results to those that were obtained with TA methods, load-elongation test was carried out. Results showed that (1) TA techniques can be utilized to determine the properties of EPDM membranes (2) both the black and white membrane materials displayed only slight changes in their properties in response to exposure as assessed through TA methods. (3) as opposed to the TA results, the load-elongation values displayed significant changes. The TA tests determined bulk properties of the sheets of rubber, whereas the elongation measurements were, to a great extent affected by the surface properties. In light of the research findings It is suggested that research continue to produce more information that is needed for the use of TA methods in standards.

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