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Dr. Mohamed Salah Omar :: Publications:

Title:
Improvements of White Pine Wood Properties by Impregnation with Unsaturated Polyesters in Admixture with Styrene
Authors: A. A. MAHMOUD, A. M. F. EISSA, M. S. OMAR, A. A. EL-SAWY, A. F. SHAABAN
Year: 2001
Keywords: white pine wood; impregnation; unsaturated polyesters; water repellent; antiswelling; compressive strength; fire retardancy
Journal: Journal of Applied Polymer Science
Volume: 82
Issue: Not Available
Pages: 1410–1416
Publisher: © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 1410–1416, 2001
Local/International: International
Paper Link: Not Available
Full paper Mohamed Salah Omar _Wood polyester.pdf
Supplementary materials Not Available
Abstract:

Four unsaturated polyester resins based on poly(ethyleneglycol-maleatephthalate) (PE) with different bromine contents were used for the impregnation and coating of oven-dried white pine wood samples in admixture with styrene (St). Curing was affected by the initiator–heat technique by using 0.2 wt % of benzoyl peroxide (Bz2O2). It was found that the use of the four prepared unsaturated polyester/styrene (PE/St) mixtures resulted in the formation of wood plastic combinations (WPC) with a higher percentage retention, higher percentage crosslinking, water repellent effectiveness, and antiswelling efficiency. ASE properties are excellent for wood samples impregnated with resin without bromine. Water absorption was decreased and a good water uptake was obtained by wood samples impregnated by resin of lower bromine content. Compressive strength was increased for all samples, especially for the wood samples impregnated with resin without bromine. The flammability test for the prepared plastics showed that the samples without bromine are classified as burning substance and the other three samples contain bromine are classified as self-extinguishing samples fromASTMD635-68T (1956). On the other hand, impregnated wood samples with PE/St mixtures show no fire retardancy after carrying ASTM E160-50 (1965), whereas coated wood samples with the same mixtures show excellent fire retarding properties.

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