Rheological behavior and microstructure of aqueous suspension of carboxylated core-shell structured latex particle

Citation
H. Nakamura et K. Tachi, Rheological behavior and microstructure of aqueous suspension of carboxylated core-shell structured latex particle, J APPL POLY, 79(9), 2001, pp. 1627-1633
Citations number
28
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science","Material Science & Engineering
Journal title
JOURNAL OF APPLIED POLYMER SCIENCE
ISSN journal
0021-8995 → ACNP
Volume
79
Issue
9
Year of publication
2001
Pages
1627 - 1633
Database
ISI
SICI code
0021-8995(20010228)79:9<1627:RBAMOA>2.0.ZU;2-Y
Abstract
Core-shelf type carboxylated particles form a flocculated structure in aque ous suspension with neutralization of carboxyl groups. Rheological behavior s of the suspension have been studied at various temperatures, and microstr uctures of the suspension have been discussed from the rheological behavior s and SAXS measurements. At 25 degreesC, G' is larger than G" in all omega regions, and G' is almost independent of omega, and the diffraction peak is detected by SAXS. These results mean that a three-dimensional network of i nterconnected lattice-like flocculated structure is formed. With increasing temperature, omega dependency of G' becomes stronger and distance of the p articles of the structure does not changed. These mean the network linkage is disrupted partially by thermal motion, and the interconnected lattice-li ke flocculated structure changes to an isolated lattice-like one with incre asing temperature. With increasing the degree of neutralization, an isolate d structure changes to an interconnected three-dimensional structure decrea sing the thermal motion just like decreasing temperature. (C) 2000 John Wil ey & Sons, Inc.