论文部分内容阅读
将低粘度酚醛树脂和聚乙烯醇(PVA)共混制得改性酚醛树脂,并将改性酚醛树脂应用于砂布制作。利用重量法、旋转法、滴定法、气相色谱等对改性酚醛树脂的理化性能进行了检测。结果表明:改性酚醛树脂的粘度达到1 300 mPa·s,固体、游离苯酚和游离甲醛的质量分数分别为59.15%、6.01%和0.25%,均优于未改性树脂。粘胶量为110～130 g/m2时砂布的外观、耐磨性和柔韧性最佳。
The low viscosity phenolic resin and polyvinyl alcohol (PVA) were modified phenolic resin was made, and the modified phenolic resin used in emery cloth. The physical and chemical properties of the modified phenolic resin were tested by gravimetric method, rotation method, titration method and gas chromatography. The results showed that the viscosity of modified phenolic resin reached 1 300 mPa · s, the contents of solid, free phenol and free formaldehyde were 59.15%, 6.01% and 0.25%, respectively, which were better than those of unmodified resin. When the amount of adhesive 110 ~ 130 g / m2 earthen cloth appearance, wear resistance and flexibility of the best.