基于响应面法的酚醛树脂固化条件优化

Curing Condition Optimization of Phenol-Formaldehyde Resin by Response Surface Methodology

为促进酚醛树脂固化、降低能耗,采用响应面法对影响酚醛树脂固化的3个主要因素:固化剂用量、热压温度、热压时间进行优化。以胶合强度为考察指标,在单因素试验的基础上,根据中心复合设计原理进行试验设计,并对各因素及其相互之间的交互作用进行分析。结果表明,影响树脂固化因数的顺序为热压温度>热压时间>固化剂用量。当固化剂质量为胶液量的1.35%,热压温度105℃,热压时间0.8 min/mm时,制得的Ⅰ类胶合板胶合强度为1.21 MPa,达到国家标准GB9846-2004的要求(≥0.8 MPa)。

In order to promote the curing and reduce the energy consumption of phenol-formaldehyde resin during the curing process, the curing factors, such as curing agent usage, hot pressing temperature, and hot pressing time, were optimized through the response surface methodology. Using bonding strength as response index, the response surface methodology experiment according to Central- Composite Design was carried out after the single-factors tests, then curing factors and its interactions were investigated as well. The results show that the order of effects in the curing process is as follow： hot pressing temperature 〉 hot pressing time 〉 curing agent usage. Bonding strength of plywood is 1.21 MPa which meets the requirements （0.80 MPa） of the China National Standard （GB/T9846 - 2004 plywood type I） when the mass of curing agent usage is 1.35% of the phenol-formaldehyde resin, hot pressing temperature is 105℃ , and hot pressing time is 0. 8 min/mm.