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Abstract
This study was conducted to provide baseline data on the applicability of thermal mechanical analysis (TMA) for characterizing EPDM roofing membrane materials. TMA has not been used extensively for the analysis of such materials. Three black and three white membrane materials were analyzed before and after exopsure to the heat, ozone, and ultra violet (UV) conditions described in ASTM Specification for Vulcanized Rubber Sheet used in Single Ply Roof Membrane (D 4637), as well as to outdoor exposure. Load-elongation was conducted as a comparison to the TMA results. The results indicated that (1) TMA can be applied to the characterization of EPDM membrane materials showing differences in glass transition temperature between various brand name products; (2) changes in glass transition temperatures induced by the exposure conditions were relatively low and covered the same range for both the black and white membrane materials; and (3) in contrast to the TMA testing, the percent elongation values displayed relatively large changes.
This study was conducted to provide baseline data on the applicability of thermal mechanical analysis (TMA) for characterizing EPDM roofing membrane materials. TMA has not been used extensively for the analysis of such materials. Three black and three white membrane materials were analyzed before and after exopsure to the heat, ozone, and ultra violet (UV) conditions described in ASTM Specification for Vulcanized Rubber Sheet used in Single Ply Roof Membrane (D 4637), as well as to outdoor exposure. Load-elongation was conducted as a comparison to the TMA results. The results indicated that (1) TMA can be applied to the characterization of EPDM membrane materials showing differences in glass transition temperature between various brand name products; (2) changes in glass transition temperatures induced by the exposure conditions were relatively low and covered the same range for both the black and white membrane materials; and (3) in contrast to the TMA testing, the percent elongation values displayed relatively large changes.
Date
9/1991
9/1991
Author(s)
Glenn Gaddy; Walt Rossiter; Ronald Eby
Glenn Gaddy; Walt Rossiter; Ronald Eby
Page(s)
168-175
168-175
Keyword(s)
characterization; EPDM; ethylene propylene diene terpolymer; rubber; environment; roofing; single ply membrane; thermal mechanical analysis; TMA; thermal analysis
characterization; EPDM; ethylene propylene diene terpolymer; rubber; environment; roofing; single ply membrane; thermal mechanical analysis; TMA; thermal analysis