2026-04-17T12:00:22Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3394382026-01-30T07:57:04Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Márquez Fibla, Irene author Paredes, Nuria author Alarcia Hernanz, Felipe author Velasco Perero, José Ignacio author 2020-12-01 Currently, pressure-sensitive adhesives (PSA) are used in more than 80% of all labels in the market today. They do not require any heat, solvent, or water to activate: It only takes light pressure to apply them to a product surface. Many products that come in glass bottles need labels that have staying power in harsh conditions. For that reason, it is necessary to have a good balance between all the polymer adhesive properties. In this study is described how adhesive properties of water-based PSA were affected by varying the amount of functional monomer acrylic acid (AA) and chain transfer agent, tert-dodecyl mercaptan (TDM). Four series of PSA were prepared by emulsion polymerization. Within each polymer series, the AA monomer proportion was held constant between 0.5 and 3.0 phm, and the fraction of the chain transfer agent was varied 0.0 to 0.2 phm. The results showed that the gel content decreased with the increase of the chain transfer agent and with the reduction of AA. All adhesives properties (tack, peel, and shear resistance) improved with increasement of the AA monomer. The increase of chain transfer agent caused decrease of the gel content resulting in higher peel resistance and tack values, but lower shear resistance values Funding: This research was funded by AGAUR Doctorats Industrials, grant number 2017-DI-062 Postprint (published version) Àrees temàtiques de la UPC::Enginyeria dels materials Adhesives Emulsion polymerization Pressure-sensitive adhesives Acrylic PSA Emulsion polymerization Adhesion properties Adhesius Polimerització per emulsió Influence of acrylic acid and tert-dodecyl mercaptan in the adhesive performance of water-based acrylic pressure-sensitive adhesives