无机锆盐-阳离子PVA共聚物乳液的研究及应用

以阳离子PVA为分散剂，苯乙烯（St）、丙烯酸丁酯（BA）为单体，甲基丙烯酰氧乙基三甲基氯化铵（DMc）为功能单体，利用无皂乳液聚合技术制备了一种阳离子乳液表面施胶剂。在制备阳离子PVA乳液表面施胶剂时，将无机的氧氯化锆引入有机乳液中提高施胶剂的应用效果，讨论了反应条件的变化对乳液稳定性及施胶应用效果的影响。确定了较佳的合成条件：m（St）：m（BA）=1．5：1，m（DMC）／{m（st）＋m（BA）}=0．20，w（H2O2）=2．5％，n（H2O2）：n（FeSO4）=0．05，氧氯化锆的用量为0．4％，PH=3～4，反应温度80℃，反应时间6h。聚合物乳液在纸上施胶后纸张的施胶度、耐破度、抗张力相对SAE施胶剂分别可以提高87％、11％、50％。

Research and application of zirconium oxychloridecationic PVA copolymer emulsion

The sizing agent of cationic emulsion was prepared by the soap-free emulsion copolymerization of styrene (St), butyl acrylate (BA), as monomers, methacrylatoethyl trimethyl ammonium chloride (DMC) as functional monomer by using PVA as a dispersant. The effect of react- ing conditions on the stability of the latex and sizing performance was discussed through introducing to zirconium oxychloride. The results show that the optimum reaction condition are as follows: m(DMC)/ {m(St)+m(BA)} being 0.20, m(St)/m(BA) being 1.5:1, n(H2O2):n(FeSO4) being 0.05, w(H2O2) 2.5%, reaction temperature 80℃, reaction time 6h. Compared with SAE sizing emulsion, the effect of the polymer emulsion prepared on paper sizing, bursting strength, and tensile strength are in- creased by 87%, 11%, 50% respectively.