AbstractEffect of pressing time on

Abstract
Effect of pressing time on physical and mechanical properties of phenolic-impregnated bamboo strips was evaluated. Bamboo strips (Gigantochloa scortechinii) were impregnated with low molecular weight phenol formaldehyde (LMwPF) resin. Samples were submerged in LMwPF resin using a vacuum chamber of 750 mmHg for 1 h before it was released within 1.5 h. Treated strips were dried in an oven with a temperature of 60 °C within 6–9 h. It was hot pressed at 14 kg m−2 and a temperature of 140 °C for 5, 8, 11, 14 and 17 min. The physical and mechanical properties of the test indicated that the properties of phenolic-treated strips have significantly increased as compared to control samples. Dimensional stability (water absorption, thickness swelling and linear expansion) of the phenolic-treated properties were significantly lower than control after 5-min pressing time. The antishrink efficiency (ASE) of phenolic-treated strips increased when pressing time were extended from 5 to 17 min. The mean value of modulus of rupture (MOR) for the control samples (177 N mm−2) showed a significant difference with phenolic-treated strips after 17-min pressing time (224 N mm−2). However, there is no significant difference in compression parallel to grain. The MOE of phenolic-treated strips was 21,777 N mm−2 and for control was 18,249 N mm−2, whereas the compression parallel to grain values for phenolic-treated and control samples were 94 and at 77 N mm−2, respectively.

ผลลัพธ์ (อังกฤษ) 3:

Abstract
Effect of pressing time on physical and mechanical properties of phenolic-impregnated bamboo strips was, evaluated. Bamboo strips (Gigantochloa scortechinii) were impregnated with low molecular weight phenol formaldehyde (LMwPF) resin.? Samples were submerged in LMwPF resin using a vacuum chamber of 750 mmHg for 1 h before it was released within 1.5 h.Treated strips were dried in an oven with a temperature of 60 ° C within 6 - 9 h. It was hot pressed at 14 kg m − 2 and a temperature. Of 140 ° C for 5 8 11,,, and 14 17 min. The physical and mechanical properties of the test indicated that the properties. Of phenolic-treated strips have significantly increased as compared to control samples. Dimensional stability (water, absorptionThickness swelling and linear expansion) of the phenolic-treated properties were significantly lower than control after. 5-min pressing time. The antishrink efficiency (ASE) of phenolic-treated strips increased when pressing time were extended. From 5 to 17 min.The mean value of modulus of rupture (MOR) for the control samples (177 N mm − 2) showed a significant difference with phenolic-treated. Strips after 17-min pressing time (224 N mm − 2). However there is, no significant difference in compression parallel to, grain. The MOE of phenolic-treated strips, was 21 777 N mm − 2 and for control was 18 249 N mm − 2,,Whereas the compression parallel to grain values for phenolic-treated and control samples were 94 and at 77 N mm −, 2 respectively.
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