PHENOLIC AND TANNIN-BASED ADHESIVE RESINS BY REACTIONS OF COORDINATED METAL LIGANDS .2. TANNIN ADHESIVE PREPARATION, CHARACTERISTICS, AND APPLICATION

被引：46

作者：

PIZZI, A

机构：

[1] Composite Products Division, National Timber Research Institute, Council for Scientific and Industrial Research, Pretoria

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 1979年 / 24卷 / 05期

关键词：

D O I：

10.1002/app.1979.070240511

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The accelerating effect due to bivalent metal ions observed in simple phenol–formaldehyde reactions are also observed in tannin–formaldehyde resins. Tannin steric hindrance prevents the retarding effect of trivalent metallic ions on tannin–formaldehyde reactions. Small amounts of metal ions do not significantly increase flavonoid B‐ring participation to the crosslinking of tannin–formaldehyde networks. Improved plywood strength and shorter pressing times are obtained by the addition of metal ions to tannin/formaldehyde resins. These results are due to faster curing promoted by the presence of the metal ions. Copyright © 1979 John Wiley & Sons, Inc.

引用

页码：1257 / 1268

页数：12

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