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研究了在加速老化的条件[90℃,相对湿度(RH)50%]下,接枝壳聚糖、阳离子淀粉和聚乙烯醇(PVA)对施胶纸加速老化的影响。研究表明:随着老化时间的增加,纸张的白度降低,pH下降;在同样的老化时间里,壳聚糖施胶纸的白度下降最多,PVA施胶纸和阳离子淀粉施胶纸的白度下降程度没有太大差别;与空白纸样相比,接枝聚合物后施胶纸的撕裂指数、拉伸指数和耐折度提高了;其中,接枝PVA和壳聚糖后,纸张耐折度提高的幅度最大。
The effect of grafted chitosan, cationic starch and polyvinyl alcohol (PVA) on the accelerated aging of sizing paper was investigated under accelerated aging conditions (90 ° C, 50% relative humidity (RH)]. The results showed that with the increase of aging time, the whiteness of the paper decreased and the pH decreased. In the same aging time, the whiteness of the chitosan sizing paper decreased the most, while that of the PVA sizing paper and cationic starch sizing paper Degree of decline is not much difference; compared with the blank paper samples, the graft polymer sizing paper tear index, tensile index and folding resistance increased; wherein, after grafting PVA and chitosan, paper resistance Fold the largest increase in the degree.