Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


Abdallah with signature.pdf (816.39 KB)

ETD Abstract Container

Abstract Header

Examining Regional Weather Effects on Single Ply Roofing Membranes

Abdallah, Gisica N
http://rave.ohiolink.edu/etdc/view?acc_num=ysu1525444933493141

Abstract Details

2018, Master of Science in Engineering, Youngstown State University, Department of Civil/Environmental and Chemical Engineering.
Weather across the different regions in the country can variably influence the performance of roofing membranes, affecting the long-term stability and function of single ply roofing membranes, such as Thermoplastic polyolefin (TPO), Polyvinyl chloride (PVC), and Ethylene-propylene-diene monomer (EPDM). Different weathering factors, such as humidity, salinity, UV exposure, and freezing and thawing cycles, were simulated under lab conditions to mimic diverse weather conditions across the various regions in the United States. Using the different lab conditions, the aging effects can be associated with different regions based on specific weathering patterns. Therefore, a more accurate prediction of roofing performance can be predicted and applied to enhance the choice for appropriate roofing systems and warranty plans in the roofing industry.The research presented here details the effects of various environmental exposures over 1000 or more hours on three different single ply roofing membranes to establish specific weathering behavior. To test different weathering effects, weight, puncture resistance, and thickness were measured for all three membranes after each aging cycle. TPO lost weight, puncture resistance, and thickness, indicating material degradation and oxidation of the membranes after the different aging cycles. PVC lost puncture resistance, but gained weight and thickness throughout the experiment. Measurements demonstrated water retention,oxidation, and degradation of the polymer due to UV. EPDM gained weight, puncture resistance, and thickness. EPDM absorbed water but was more UV stable than both PVC and TPO. The negative effects of all three membranes were highlighted after the freeze-thaw conditions, where temperature changes caused thermal stress on the membranes and caused a decrease in puncture resistance. QUV effects were increased after extended hours of exposure (2000 hours), and were less prominent when membranes were initially exposed to 1000 hours. UV stabilizers in the membranes were able to withstand 1000 hours of exposure, but began to degrade when tested after 2000 hours. Salt and humidity presented similar results to QUV effects, and isolated humidity effects were more apparent on EPDM membranes, where water retention was a clear effect.
Holly Martin, PhD (Advisor)
Jeffrey Meyers, MS (Advisor)
Pedro Cortes, PhD (Committee Member)
96 p.
Polymer Chemistry
Roofing membranes; single ply; PVC; TPO; EPDM

Recommended Citations

Citations

  • Abdallah, G. N. (2018). Examining Regional Weather Effects on Single Ply Roofing Membranes [Master's thesis, Youngstown State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1525444933493141

    APA Style (7th edition)

  • Abdallah, Gisica. Examining Regional Weather Effects on Single Ply Roofing Membranes. 2018. Youngstown State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ysu1525444933493141.

    MLA Style (8th edition)

  • Abdallah, Gisica. "Examining Regional Weather Effects on Single Ply Roofing Membranes." Master's thesis, Youngstown State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1525444933493141

    Chicago Manual of Style (17th edition)

ysu1525444933493141
921
© 2018, all rights reserved.
This open access ETD is published by Youngstown State University and OhioLINK.