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在板栗苞粉、苯酚、浓硫酸质量比为1∶3∶0.09,树脂化工艺不变的基础上,研究了液化时间和温度对液化反应过程和树脂化的影响。发现随着液化时间和温度的增加,液化率和树脂化率逐渐增加,但过高温度不利于液化和树脂化。液化时间和温度的改变对游离苯酚含量和可被溴化物含量影响不大,苯酚在板栗苞树脂化过程中起着桥梁作用。在液化时间60min,温度150℃时,板栗苞液化和树脂化实验重现性很好,且制备的酚醛树脂性能较好。
The effects of liquefaction time and temperature on the liquefaction process and resinification were studied on the basis of the same ratio of chestnut powder, phenol and concentrated sulfuric acid of 1: 3: 0.09. It is found that with the increase of liquefaction time and temperature, liquefaction rate and resinification rate gradually increase, but too high temperature is not conducive to liquefaction and resinification. Changes in liquefaction time and temperature have little effect on free phenol content and bromide content, and phenol plays a role as a bridge in the process of resinification of chestnut buds. When the liquefaction time was 60 min and the temperature was 150 ℃, the liquefaction and resinification of chestnut bud were very good, and the prepared phenolic resin had better performance.