農林廢料製造木材膠合劑之研究（VII）酚－萃取物－甲醛共聚合樹脂之熱硬化性

Studies on the Manufacture of Wood Adhesives from the Residue of Agriculture and Forest (VII)-Thermosetting Properties of PhenolExtractive-Formaldehyde Copolymer Resins

李文昭(Wen-Jau Lee) ； 劉正字(Cheng-Tzu Liu)

《林產工業》 18卷4期 (1999/12) Pp. 383-391

https://doi.org/10.6561/FPI.1999.18(4).6

摘要

本研究乃利用熱示差掃描卡量（DSC）探討相思樹、台灣泡桐、木油桐、山黃麻、杉木、台灣杉等之樹皮及稻殼、蔗渣等農林廢料之鹼萃取物與酚及甲醛行共聚合反應所合成共聚合樹脂（PTF）之熱硬化特性。由其結果得知，各PTF共聚合樹脂之硬化反應熱均較PF樹脂為低，且隨樹脂合成時萃取物對酌取代量增加，反應熱減少，不同種類PTF樹脂之放熱峰溫度以木油桐樹皮萃取物最高，等溫加熱模式下所需之硬化時間依萃取物種類及添加量而異，在較低加熱溫度下，其硬化所需時間與硬化反應之活化能成正相關。

關鍵字

酚－萃取物－甲醛共聚合樹脂 ； 熱示差掃描卡量 ； 熱硬化

並列摘要

The aim of this study was to investigate the thermosetting behavior of copolymer resin (PTF) from alkali extractives of. various kinds of bark, such as acacia confusa (Taiwan acacia), Paulownia taiwaniana (Taiwan paulownia ), Aleurites montana (wood oil tree), Trema orientalis (India charcoal trema), Cunninghamia lanceolata (China fir), Taiwania cryptomeri- oides (taiwania) and the agriculture residue such as rice hull and bagasse with phenol and formaldehyde. The results were summarized as follows: The heat of curing reaction of PTF copolymer resin was lower than that of PF resin. Increment of the extractive substitution of PTF would decrease the heat of curing reaction. PTF copolymer resin made by bark extractive of wood oil tree had the highest temperature of exothermic peak. The time needed for curing under isothermal condition varied with different kind of extractive and the substitution amount. There was positive correlation between the time needed for curing and activation energy under lower heating temperature.

並列關鍵字

Phenol- extractive- formaldehyde copolymer resins ； Differential scanning calorimetry (DSC ) ； Thermosetting