Márquez Irene, Paredes Núria, Alarcia Felipe, Velasco José Ignacio
Lubrizol Advanced Materials, Applications Department, Camí de Can Calders, 13, 08173 Sant Cugat del Vallès, Spain.
Poly2 Group, Department of Materials Science and Engineering, Universitat Politècnica de Catalunya (UPC BarcelonaTech), ESEIAAT, Carrer de Colom, 11, 08222 Terrassa, Spain.
Polymers (Basel). 2022 Feb 24;14(5):909. doi: 10.3390/polym14050909.
A series of pressure-sensitive adhesives (PSA) were prepared by emulsion polymerization in order to obtain a PSA that meet with the current label market requirements. For it, the effect of the incorporation of acrylonitrile (ACN) as hard monomer was investigated in a -butyl acrylate (-BA) and acrylic acid (AA) system. Great differences were found in the adhesive performance according to the ACN weight ratio. Its increased resulted in a considerable rise in the average sol molecular weight and in the glass transition temperature. This was reflected in a decrease of adhesion forces (peel resistance and tack) and an increase of the cohesion forces (shear resistance). Moreover, the incorporation of the minimum amount of ACN studied showed a great change in the elastic modulus determined by dynamic shear resistance with respect to the based formulation that did not contain ACN. Finally, the ice bucket test was carried out to check the adhesive performance in cold and wet environments.
为了获得符合当前标签市场要求的压敏胶粘剂（PSA），通过乳液聚合制备了一系列PSA。为此，在丙烯酸丁酯（-BA）和丙烯酸（AA）体系中研究了引入作为硬单体的丙烯腈（ACN）的效果。根据ACN重量比，发现胶粘剂性能存在很大差异。其增加导致平均溶胶分子量和玻璃化转变温度显著升高。这表现为粘合力（抗剥离力和粘性）下降，内聚力（抗剪切力）增加。此外，与不含ACN的基础配方相比，所研究的最低ACN用量的引入使通过动态剪切阻力测定的弹性模量发生了很大变化。最后，进行了冰桶试验以检查在寒冷和潮湿环境中的胶粘性能。
