Effect of curing conditions on the properties of multivesiculated polyester particle dispersions

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Ângela Dias (Author) FEUP; João Machado (Author) Other; Jorge Moniz (Author) Other; Adélio M. Mendes (Author) FEUP; Fernão D. Magalhães (Author) FEUP

Journal

Title: Polymer Engineering and Science

Vol. 54 No. 2

Pages: 396-403

ISSN: 0032-3888

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge

ISI Web of Science

Scopus - 2 Citations

Scientific classification

FOS: Engineering and technology

Associated Projects

PTDC/EQU-EQU/112151/2009 - Sistema microfluído para síntese de partículas vesiculadas

Other information

Authenticus ID: P-008-ZCA

DOI: 10.1002/pen.23571

Abstract (EN): Multivesiculated polyester particles were synthesized from a double emulsion system comprising water and a solution of unsaturated polyester in styrene. A suspension of solid micro-particles containing multiple water-filled vesicles is obtained after curing (i.e., crosslinking) the dispersed organic phase. These have several applications, like opacifying agents in paint formulations. The effects of curing time and temperature on relevant properties of the final product (particle size distribution, dry film opacity, dispersion viscosity, and stability) were investigated. Results showed that more than 1 h was necessary when curing at room temperature, in order to avoid coalescence and loss of opacity upon drying. On the other hand, well-individualized particles were obtained within a few minutes when curing above 60°C, and the internal alveolar structure was preserved after drying. Furthermore, high curing temperatures enhanced not only the final dry film opacity, but also originated less viscous and more stable particle dispersions. © 2013 Society of Plastics Engineers.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8