Development of Carboxylated Nitrile Latices / Desenvolvimento de Látices Nitrílicos Carboxilados

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

In this dissertation an emulsion polymerization process of acrylonitrile, butadiene and carboxylic acid was studied, in pilot scale, for the production of carboxylated nitrile latex with high solids content directly from the reaction process, without the need of post-reaction steps of concentration. It was studied the effect of temperature, type and amount of emulsifier, type and amount of initiator, type of stirring system, stirring speed and the steps of incremental additions for the production of high solid latex and its influence in the average particle size and distribution. The obtained copolymers were characterized by gravimetry using a microwave oven to determine total solids content, by light scattering in order to determine the average particle size and its distribution and by infrared spectroscopy to determine monomer composition. A latex up to 57% of total solids was obtained. The average particle size ranged from 130 nm to 230 nm.

ASSUNTO(S)

látex nitrílico carboxilado nitrile latex polimerização em emulsão emulsion polimerization quimica látex nitrílico carboxylated nitrile latex

ACESSO AO ARTIGO

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