Studies on Formaldehyde-Condensation Resin
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概要
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The co-condensation reaction when phenol was added to acetoguanamine-formaldehyde resin (AGR) was studied. One is the non-catalytic curing reaction i) and the other is the reaction in the mixed solvent of dioxane-water, using hydrochloric acid as a catalyst ii).<BR>By assuming that co-condensation reaction is caused mainly by the following two condensation reactions and phenol is bifunctional, <BR><BR>_??_<BR>(I)<BR>_??_<BR>(II) the behavior of the reaction of i) and ii) was investigated by the mathematical treatment of the results of kinetics experiments.<BR>In the case of i), it was found that the competitive reaction could be neglected from the analysis of the products and kinetic data that the methylol group -CH<SUB>2</SUB>OH in AGR reacted predominantly with phenol (II) and only slightly with the amino group-NH<SUB>2</SUB> (I). In the case of ii), it was also recognized from kinetic data that two condensation reactions of the methylol group with the amino group in AGR (I) and with phenol (II) occured simultaneously and the value of the ratio k<SUB>1</SUB>/k<SUB>2</SUB> was about 1. 5.<BR>In both cases of above reactions, phenol, appeared to have character than be trifunctional, the decrease in the concentration of phenol was found to be in reasonable harmony with a second-order reaction equation.
- 公益社団法人 高分子学会の論文
公益社団法人 高分子学会 | 論文
- 情報の入口--高分子センサ-とトランスデュ-サ- (情報化社会と高分子)
- 高分子科学最近の進歩--メルトレオロジ-(伸長粘度)
- 高分子系の相分離--特にポリマ-ブレンドについて
- 導電性高分子の磁気緩和--NMRT-1〓1の周波数依存性
- 多機能性高分子の合成 (化学修飾による多機能性高分子)