热固型P RF树脂制备及其对胶合防腐竹材剪切强度影响1）

为满足经防腐处理的竹结构材胶合强度的要求,合成了系列低质量分数间苯二酚的热固型苯酚－间苯二酚－甲醛（ PRF）树脂,应用于粘接防腐处理的竹材。结果表明：随着合成树脂中间苯二酚质量分数的增加,树脂的溶水倍数显著增加,树脂密度先减少后增加;随着甲醛与苯酚摩尔比的增加,树脂的游离甲醛质量分数显著增加,固体质量分数减小,树脂密度先减少后增加。 PRF树脂用于胶合防腐处理的竹片,剪切强度值比无间苯二酚的酚醛树脂（ RF）增加200％以上,间苯二酚质量分数在1％～4％范围内变化,对树脂剪切强度影响不明显。综合性价比与环保要求,优化的PRF树脂的间苯二酚质量分数为1．0％、甲醛与苯酚摩尔比为1．6∶1．0。     

Characterising Gluing Properties of Lodgepole Pine Containing Beetle-Transmitted Bluestain

In the article, with the instruments of the Research Institute of Wood Industry, Chinese Academy of Forestry, the experiment method of Forintek Canada Corp. was used to test the laminating of lodgepole pine containing beetle-transmitted bluestain; finally the result was compared with Canada report. The results show that the presence of glue joints of bluestained wood made with either PVA or PRF adhesive makes no difference to the shear strength of the joints, and no difference to durability of the joints using PRF. Also the presence of beetle-transmitted bluestain in wood does not affect the adherence of the interior finishes tested.     

集成材用PRF树脂胶的研究

本文就ＰＲＦ合成的基本条件进行了一般性研究，确定了ＰＲＦ树脂的合成条件，同时根据ＰＲＦ树脂胶性能确定了胶合工艺参数。