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以葡萄糖代替甲醛合成类似于脲醛树脂的绿色环保型葡萄糖缩二脲树脂。用正交实验法对反应的pH值、反应温度、催化剂用量、反应配比和反应时间及固化条件进行了优选。通过红外光谱(IR)对葡萄糖缩二脲树脂的反应机理进行了探讨,基本证实了Viswanathan所推测的机理。葡萄糖缩二脲树脂胶黏剂合成的最佳工艺条件为:pH值为1.0,n(葡萄糖)∶n(缩二脲)=10∶1,催化剂用量为0.6%,反应温度为95℃,反应时间为11h。该树脂以苯酐作固化剂的最佳固化条件为:120℃,固化剂用量为8%,固化时间为2.0h。
Glucose biuret resin instead of formaldehyde synthesis of urea-formaldehyde green biodegradable biuret resin. The orthogonal experiment was used to optimize the reaction pH value, reaction temperature, catalyst dosage, reaction ratio, reaction time and curing conditions. The reaction mechanism of glucose biuret resin by infrared spectroscopy (IR) was discussed, and the mechanism predicted by Viswanathan was basically confirmed. The optimal conditions for the synthesis of glucose biuret adhesive were pH 1.0, n (glucose): n (biuret) = 10:1, catalyst dosage 0.6%, reaction temperature 95 ℃, reaction time The time is 11h. The best curing condition of the resin with phthalic anhydride as curing agent is 120 ℃, the amount of curing agent is 8% and the curing time is 2.0h.