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Abstract
A study was conducted to compare the creep rupture response (i.e., time-to-failure or TTF) of tape bonded and liquid adhesive bonded seams of EPDM (ethylene-propylene-diene terpolymer) roofing membrane. Two commercial tape systems (i.e. tape and primer) and one liquid adhesive were applied to well cleaned EPDM rubber. The creep rupture experiments were conducted at 23C and 40% to 45% relative humidity under peel loads ranging from 3.1 N to 24.9N (0.7 lbf to 5.6 lbf). For each adhesive system, the data were found to be fitted well by the model: In(mean TTF) = bo +b1xLoad+b2 exp(b3xload). A comparison of the fitted curves for the tape-bonded specimens with those for the liquid-adhesive-bonded specimens provided a asis for evaluating the relative creep rupture response of the two types of bonding seams. Similarly a comparson of the fitted curves for the replicate data sets of each adhesive system gave a measure of the batch-to-batch reproducibility of the creep rupture data. The major conclusion was that the tape bonded specimens had times to failure that were, in most cases, comparable to or greater than those ofthe liquid-adhesive-bonded specimens. And, the tape-bonded specimens provided time-to-falure results that were reproducible between replicate sets.
A study was conducted to compare the creep rupture response (i.e., time-to-failure or TTF) of tape bonded and liquid adhesive bonded seams of EPDM (ethylene-propylene-diene terpolymer) roofing membrane. Two commercial tape systems (i.e. tape and primer) and one liquid adhesive were applied to well cleaned EPDM rubber. The creep rupture experiments were conducted at 23C and 40% to 45% relative humidity under peel loads ranging from 3.1 N to 24.9N (0.7 lbf to 5.6 lbf). For each adhesive system, the data were found to be fitted well by the model: In(mean TTF) = bo +b1xLoad+b2 exp(b3xload). A comparison of the fitted curves for the tape-bonded specimens with those for the liquid-adhesive-bonded specimens provided a asis for evaluating the relative creep rupture response of the two types of bonding seams. Similarly a comparson of the fitted curves for the replicate data sets of each adhesive system gave a measure of the batch-to-batch reproducibility of the creep rupture data. The major conclusion was that the tape bonded specimens had times to failure that were, in most cases, comparable to or greater than those ofthe liquid-adhesive-bonded specimens. And, the tape-bonded specimens provided time-to-falure results that were reproducible between replicate sets.
Date
5/1996
5/1996
Author(s)
W Rossiter; M Vangel; E Embree; K Kraft; J Seiler
W Rossiter; M Vangel; E Embree; K Kraft; J Seiler
Page(s)
60
60
Keyword(s)
seam tape; EPDM; peel; creep rupture; tape bonded; TTF;liquid adhesive; seams; adhesive tape; bonding; time to failure
seam tape; EPDM; peel; creep rupture; tape bonded; TTF;liquid adhesive; seams; adhesive tape; bonding; time to failure