文献类型：期刊文献

英文题名：Thermal Degradation and Stability of Accelerated-curing Phenol-formaldehyde Resin

作者：Chen, Yuzhu[1] Fan, Dongbin[1] Qin, Tefu[1] Chu, Fuxiang[1]

第一作者：Chen, Yuzhu

通信作者：Fan, DB[1]|[a0005c9807e2805d84556]范东斌;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2014

卷号：9

期号：3

起止页码：4063-4075

外文期刊名：BIORESOURCES

收录：;EI(收录号：20142217778497);Scopus(收录号：2-s2.0-84901313076);WOS:【SCI-EXPANDED(收录号:WOS:000344184300027)】；

基金：The authors are very grateful for financial support from National Natural Science Foundation of China (Project No. 31200441) and National Key Technology R&D Program of China (Project No. 2012BAD24B04).

语种：英文

外文关键词：Accelerators; Kinetics; Phenol-formaldehyde resin; Thermal degradation

摘要：In order to study the thermal stability of accelerated-curing PF resin, the curing behavior of fresh PF resin was investigated in the presence of single accelerator of methylolurea derivatives (MMU), magnesium hydrate (Mg(OH)(2)), 25% aqueous solution of sodium carbonate (Na2CO3), and propylene carbonate (PC). Also their optimum combination was added in fresh PF resin. The thermal stability of cured phenol-formaldehyde (PF) resins was studied using thermogravimetric analysis TG/DTA in air with heating rates of 5, 10, 15, and 20 degrees C min(-1) Thermal degradation kinetics were investigated using the Kissinger and Flynn-Wall-Ozawa methods. The results show that these accelerators can promote fresh PF resin fast curing, and the degradation of accelerated-curing cured PF resin can be divided into three stages. Single accelerator MMU, Mg(OH)(2), and Na2CO3 can promote fresh PF curing at low temperatures in the first stage, while the structure of PF resin which was added with MMU and PC was more rigid, according to thermal degradation kinetics. A novel fast curing agent which is compound with MMU+Na2CO3 for PF resin is proposed; not only can it maintain the advantage of fast curing of the single accelerator Na2CO3, but it also improves the thermal stability of PF resin.