Fonseca, José Luis CardozoSouza, Thiago Vasques de2017-01-172017-01-172016-07-27SOUZA, Thiago Vasques de. Uma nova forma de caracterização do espessamento de látexes acrílicos. 2016. 50f. Dissertação (Mestrado em Química) - Centro de Ciências Exatas e da Terra, Universidade Federal do Rio Grande do Norte, Natal, 2016.https://repositorio.ufrn.br/jspui/handle/123456789/21676The alkali soluble latex thickeners are extensively used in activities such as coating manufacturing, cosmetics, oil and textile industry. They increase apparent viscosity as a result of neutralization of carboxyl groups in latex particles. The Hydrophobic alkali soluble emulsion (HASE), currently are the thickener most used to increase the material’s rheology and the rheometry techniques is the main method used to monitor the rheological activity of these substances and its efficiency. In this work, we propose the use of dynamic light scattering (DLS) as an additional method to get quantitative parameters like characteristic relaxation rate and distribution width to correlate them to viscosity increase and carboxylic groups neutralization. We got the information obtained from traditional characterization methods as rheometry, conductivity and turbidity to compare with dynamic light scattering parameters. The critical OH- ions concentration was identified using the information about the carboxylic groups neutralization and we could to get more information about this polymer thickening process using de Dynamic Light Scattering for a better understanding about this mechanism.Acesso AbertoLátexEspessantesEspalhamento Dinâmico de Luz (DLS)PolímerosmasterThesisCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA