Banca de QUALIFICAÇÃO: THIAGO VASQUES DE SOUZA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : THIAGO VASQUES DE SOUZA
DATA : 07/06/2016
HORA: 09:00
LOCAL: Sala 3F1
TÍTULO:

A NOVEL APPROACH TO HE CHARACTERIZAION OF ACRYLIC LÁTEX THICKENING

PALAVRAS-CHAVES:

Latex, Thickeners, DLS, Polymers

PÁGINAS: 51
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Físico-Química
ESPECIALIDADE: Química de Interfaces
RESUMO:

Alkali-soluble latex thickeners are extensively used in activities such as coating manufacturing, cosmetics, and textile industry. They increase apparent viscosity as a result of neutralization of carboxyl groups present in latex particles. Rheometry is the main method used to monitor the rheological activity of these substances. In this manuscript, we propose the use of dynamic light scattering to get quantitative parameters and correlate them to viscosity increase: more specifically, the characteristic and average relaxation rates, as well as the width of the relaxation rate distribution. Critical changes of these parameters were observed during thickening; drastic changes at the same point were also observed when using the more traditional methods of monitoring rheometry, conductometry, and turbidimetry.

MEMBROS DA BANCA:
Presidente - 1198847 - JOSE LUIS CARDOZO FONSECA
Interno - 1308577 - SIBELE BERENICE CASTELLA PERGHER
Interno - 2087667 - TIAGO PINHEIRO BRAGA