| publication name | Improvement of White Pinewood Properties by Impregnation with Thiourea–Formaldehyde Resin and Orthophosphoric Acid |
|---|---|
| Authors | A. A. MAHMOUD, A. M. F. EISSA, M. S. OMAR, A. A. EL-SAWY, A. F. SHAABAN |
| year | 2000 |
| keywords | |
| journal | J Appl Polym Sci |
| volume | 77 |
| issue | Not Available |
| pages | 390–397 |
| publisher | © 2000 John Wiley & Sons, Inc. |
| Local/International | International |
| Paper Link | Not Available |
| Full paper | download |
| Supplementary materials | Not Available |
Abstract
White pinewood was impregnated with thiourea–formaldehyde (TUF) resin and orthophosphoric acid (OPA) as a crosslinking agent. The best weight gains (55– 138%) were obtained after impregnation with an aqueous solution of TUF resin for 1 h and impregnation with aqueous solutions of OPA at different concentrations for 1 h. Water uptake of treated wood was found to be 23% after a water-soaking test of 168 h, and a maximum antiswell efficiency was found to be 18% for a 85% OPA solution. Compression strength of the treated wood also improved with the highest value 62 KN/m2 for wood treated with a 70% OPA solution versus a value of 40 KN/m2 for untreated samples. Fire retardancy of the treated wood samples was also improved based on concentration of OPA.