Abstract: Taking adipic acid dihydrazide (ADH)as cross-linker, a porous polyacrylate latex film was formed at ambient temperature from polyacrylate core-shell emulsion incorporated with diacetone acrylamide (DAAM).The effects of shell composition of core-shell emulsion, ADH content, porogen content and porogen type on the permeability of latex film were investigated.The results showed that the latex particles with BA/(MMA+AA+DAAM)=2.5/2.5（mass ratio） in shell composition could not fuse completely into a continuous dense film, but formed granular deposits.Then, a loose and porous latex film with high permeability was formed with the help of porogen.The investigation further revealed that the restricted movement of polymer chains contributed to the maintenance of porous structure in the latex film and then high permeability.In addition, the study indicated that the latex films with high permeability were formed with glucose or polyethylene glycol (PEG300)as porogen.

Key words: core-shell emulsion, ambient crosslinking, latex film, permeability

摘要： 以双丙酮丙烯酰胺（DAAM）为官能性单体合成了带酮羰基的聚丙烯酸酯核壳乳液，将其与己二酸二酰肼（ADH）在室温下交联制备了聚丙烯酸酯多孔乳胶膜，考察了乳液壳层组成、ADH用量、致孔剂用量及种类对乳胶膜渗透性能的影响。研究结果表明，当壳层组成BA/(MMA+AA+DAAM)质量比为2.5/2.5时，乳胶粒子没有完全变形，粒子间相互融接堆积，结合致孔剂的作用，形成了内部呈疏松多孔结构的乳胶膜，膜的渗透量较高；研究进一步揭示，限制大分子链段的热运动有利于维持乳胶膜的多孔结构，从而获得较高的渗透量；此外，发现以葡萄糖、聚乙二醇300（PEG300）为致孔剂时可使乳胶膜获得较高的渗透量。

关键词: 核壳乳液, 室温交联, 乳胶膜, 渗透性