Evaluation of Thermoplastic Olefin (TPO) Roofing Membranes

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DOIResolve DOI: http://doi.org/10.4224/20331289
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TypeTechnical Report
Series titleInternal Report, Institute for Research in Construction, National Research Council Canada; Volume 768
Physical description26 p.
AbstractAs part of a five-year investigation, rnechanicd (strength and elongation) and chemical (thermogravimetry and dynamic mechanical analysis) methods of evaluation are used in this paper to characterize in-service thermoplastic olefin (TPO) roof membranes. AIF the nun-reinforced membranes meet the minimum thickness and tensile strength requirement as specified in the proposed ASTM standard. The poIyester scrim reinforced membranes were superior in tensile strength and elongation as compared to those reinforced with random mat of short glass fibers. The standard should consider defining the breaking strength in terms of "stress" instead of load, This would allow for a fairer and easier comparison of strength between reinforced and zlnreinforced TPOs. Also, the term TPO is confusing and very vague. The standard should consider differentiating the different types of TPOs. Based on themogravimetry, at least four different types ofTPOs are currently in service. Also, the standard should consider using the glass transition temperature to monitor agingweatbering of membranes.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number9025
NPARC number20331289
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Record identifierfc3ff0d8-1d53-4977-b698-76136707772a
Record created2012-07-18
Record modified2016-10-03
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