通过改变种子阶段乳化剂用量,采用半连续乳液聚合方法制备了不同粒径的丙烯酸酯共聚物乳液,随着乳化剂用量的增加,乳胶粒径明显变小,乳液黏度迅速增大;而对乳液聚合过程几乎没有影响,乳胶粒球形生长,二次成核粒子很少.将不同粒径的单分散乳液共混,利用动态机械热分析仪(TMA)表征共混物的分子运动,并依据FINAT标准测试了干燥后共混乳液的初粘力、剥离力和持粘强度.随着小粒径乳胶粒的加入,双组分丙烯酸酯共混物的初粘力增加,持粘强度降低;而三组分共混物乳液的性能受不同粒径乳液含量的影响,剥离力呈现下降的趋势.
参考文献
| [1] | Xiongwei Qu;Nongyue Wang;Peter A. Lovell .Preparation and Characterization of the Latexes with Different Particle Sizes by Semibatch Emulsion Polymerization and the Influence on Properties of Waterborne Pressure-Sensitive Adhesives[J].Journal of Applied Polymer Science,2009(5):3030-3040. |
| [2] | 尤伟,刘玉玲,张立群,瞿雄伟,张留成,Peter A. Lovell.核/壳结构聚合物改性硬质聚氯乙烯的力学性能[J].高分子材料科学与工程,2008(09):88-91. |
| [3] | Shen HZ;Zhang JY;Liu SJ;Liu GD;Zhang LQ;Qu XW .Effect of the chain-transfer-agent content on the emulsion polymerization process and adhesive properties of poly(n-butyl acrylate-co-acrylic acid) latexes[J].Journal of Applied Polymer Science,2008(3):1793-1802. |
| [4] | Inigo Gonzalez;Jose M.Asua;Jose R.Leiza .The role of methyl methacrylate on branching and gel formation in the emulsion copolymerization of BA/MMA[J].Polymer: The International Journal for the Science and Technology of Polymers,2007(9):2542-2547. |
| [5] | Roos A;Creton C .Effect of the presence of diblock copolymer on the nonlinear elastic and viscoelastic properties of elastomeric triblock copolymers[J].Macromolecules,2005(18):7807-7818. |
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