أعضاء هيئة التدريس - جامعة بنها
Improvement of White Pinewood Properties by Impregnation with Thiourea–Formaldehyde Resin and Orthophosphoric Acid
J Appl Polym Sci • 2000
معلومات البحث
المؤلفون
A. A. MAHMOUD, A. M. F. EISSA, M. S. OMAR, A. A. EL-SAWY, A. F. SHAABAN
الكلمات المفتاحية
Not Available
المجلة العلمية
J Appl Polym Sci
الناشر
© 2000 John Wiley & Sons, Inc.
المجلد
77
العدد
Not Available
الصفحات
390–397
publication.type
International
رابط البحث
Not Available
المواد المرفقة
Not Available
الملخص
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.
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.