论文部分内容阅读
通过对酚醛树脂与固化剂乌洛托品在４００℃、６００℃、８５０℃时氧化气氛和还原气氛下焦渣值的试验研究，表明还原气氛下的焦渣值比氧化气氛高，加入乌洛托品可增加酚醛树脂的交联度，提高焦渣值，在树脂中加入氧化剂高锰酸钾可降低焦渣值。可以推断，控制酚醛树脂砂中乌洛托品的加入量和适当加入高锰酸钾，可以调整酚醛树脂砂的热稳定性和溃散性。
Through the experimental research on the value of coking slag in phenolic resin and hardener urotropin at 400 ℃, 600 ℃ and 850 ℃ in oxidizing atmosphere and reducing atmosphere, it shows that the value of coking residue in reducing atmosphere is higher than the oxidizing atmosphere, Product can increase the degree of crosslinking of phenolic resin, increase the value of coke residue in the resin by adding oxidant potassium permanganate can reduce the value of coke residue. It can be inferred that controlling the amount of urotropine in the phenolic resin sand and proper addition of potassium permanganate can adjust the thermal stability and collapsibility of the phenolic resin sand.