【摘要】 在无乳化剂的条件下,采用连续种子乳液聚合的方法制得了丙烯酸丁酯(BA)与苯乙烯(St)为壳,VAE乳液为核的核壳乳液。考察了反应温度、引发剂用量和壳层单体滴加速率对核壳乳液的稳定性、转化率以及乳胶粒粒径的影响,从而确定了最佳的聚合工艺。红外光谱(FT-IR)、差示量热扫描分析(DSC)验证了合成的乳液具有明显的核壳结构。热重分析(TG)和剥离力度的测试表明,通过种子乳液聚合改性后的VAE乳液,在耐热性和粘接性能等方面都有了显著的改善。更多还原

【Abstract】 The core-shell emulsion containing Butyl Acrylate(BA) and Styrene(St) in shell and Vinyl Acetate-Ethylene(VAE) in core was successfully prepared by seeded emulsion polymerization without the addition of any emulsifier.Several key elements related to the polymerization,including reacting temperature,Ammonium persulfate(APS) dosages and dropping speed of monomers in shell have been investigated in details.Accordingly,an optimal reaction condition has been decided.The clear core-shell structure and chemical components of the core-shell latex particles were determined by TEM and Fourier transform infrared(FTIR) spectrometry,respectively.In addition,the comparisons between the core-shell latex and VAE latex have been made.The experimental results indicated that the developed core-shell latex presented the improved properties in both thermal stability and adhesion.更多还原