论文部分内容阅读
功能性聚合物乳液的性能与其功能基的含量密切相关.采用完全无皂种子乳液聚合技术合成了具有不同羧基含量并且粒径分布均一的交联型聚甲基丙烯酸甲酯-丙烯酸乙酯因为甲基丙烯酸[P(MMA-EA-MAA)]乳胶粒,然后通过碱后处理,制备出了高羧基含量的无皂多孔P(MMA-EA-MAA)乳胶粒.系统研究了MAA对聚合反应、胶粒特性及胶粒多孔结构形态的影响.结果表明:在交联剂二乙烯基苯用量一定(0.3 g)的条件下,随着MAA用量从4.0 mol%增加到10.0mol%,聚合物交联程度(Px)从28.26%迅速增大至90.95%,当其用量超过10.0mol%后Px增大趋势变缓;随着MAA 用量的增加,处理后胶粒体积膨胀百分率(△V)逐渐增大,在MAA用量为12.0mol%时△V达到42.1%的最大值,当MAA 用量增大到14.0 mol%时,尽管Px高达95.44%,胶粒仍具有完好的孔状结构.
The performance of the functional polymer emulsion is closely related to the content of its functional group. A crosslinked polymethylmethacrylate-ethyl acrylate with different carboxyl groups and uniform particle size distribution was synthesized by completely soap-free seed emulsion polymerization. (MMA-EA-MAA) latex particles with high carboxyl content were prepared by alkaline post-treatment.The effects of MAA on the polymerization, The properties of colloidal particles and the morphology of colloidal porous structure were studied.The results showed that with the dosage of divinylbenzene (0.3 g), the amount of MAA increased from 4.0 mol% to 10.0 mol% (Px) rapidly increased from 28.26% to 90.95%. When the amount of PMA increased from 10.0% to 10.0%, the increase trend of Px became slower. With the increase of MAA dosage, the percentage volume expansion (△ V) ΔV reached the maximum value of 42.1% when the amount of MAA was 12.0mol%. When the amount of MAA was increased to 14.0mol%, the micelles had intact pore structure despite the Px as high as 95.44%.