Foam characteristics, peel strength, and thermal conductivity for wood/NR and expanded EPDM laminates for roofing applications
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Publication Details
Author list: Yamsaengsung W., Sombatsompop N.
Publisher: Taylor and Francis Group
Publication year: 2008
Journal: Journal of Macromolecular Science Part B Physics (0022-2348)
Volume number: 47
Issue number: 5
Start page: 967
End page: 985
Number of pages: 19
ISSN: 0022-2348
eISSN: 1525-609X
Languages: English-Great Britain (EN-GB)
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Abstract
This work was aimed to improve the thermal insulation properties of wood sawdust/NR-EPDM laminating roofs by foaming the Ethylene-Propylene-Diene-Rubber (EPDM) layer through the use of two different forms (pure and modified) of 4,4'Oxybis(Benzenesulfonylhydrazide) (OBSH) blowing agent. Melt-laminates of wood/Natural Rubber (NR) and expanded EPDM were prepared for rubber composite roofs. The Ethylene-Propylene bound OBSH (EPR-b-OBSH) blowing agent was introduced as an effective blowing agent in the EPDM layer, and the foam property results were compared with the pure OBSH blowing agent. It was found that the EPR-b-OBSH created an expanded EPDM layer with a larger number of cells and better cell size distribution and also allowed EPDM samples to deform to greater strains when compared with pure OBSH agent. The optimum concentration for EPR-b-OBSH blowing agent for achieving the maximum peel strength and for lowering the thermal conductivity of the wood/NR-eEPDM laminate was 3.0 phr.
Keywords
Adhesion, Blowing agent, Composites, Laminates, natural fiber, Roofs
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