SURFACE FUNCTIONALIZATION OF POLYMER LATEX-PARTICLES - III - A CONVENIENT METHOD OF PRODUCING ULTRAFINE POLY(METHYLSTYRENE) LATEXES WITH ALDEHYDE GROUPS ON THE SURFACE

Authors
Citation
P. Li et al., SURFACE FUNCTIONALIZATION OF POLYMER LATEX-PARTICLES - III - A CONVENIENT METHOD OF PRODUCING ULTRAFINE POLY(METHYLSTYRENE) LATEXES WITH ALDEHYDE GROUPS ON THE SURFACE, Journal of polymer science. Part A, Polymer chemistry, 36(12), 1998, pp. 2103-2109
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Polymer Sciences
ISSN journal
0887-624X
Volume
36
Issue
12
Year of publication
1998
Pages
2103 - 2109
Database
ISI
SICI code
0887-624X(1998)36:12<2103:SFOPL->2.0.ZU;2-W
Abstract
A convenient method of preparing ultrafine poly(methylstyrene) (PMS) l atex particles with aldehyde groups on the surface is developed. PMS l atexes in the size range 33-81 nm were prepared via microemulsion poly merization, using cetyltrimethylammonium bromide (CTAB) as surfactant. The surface of the PMS latexes was oxidized in the presence of tert-b utyl hydroperoxide catalyzed by copper(II) chloride. As the degree of oxidation increased up to 6 h, the amounts of aldehyde group increased . Bigger particles were found to have a slightly higher rate of oxidat ion than small ones under the same oxidation conditions. The particle size underwent little change during oxidation; thus, the amounts of fu nctional groups and the particle size could be controlled concurrently . Dialysis study of the oxidized PMS microlatexes indicated that the i nstability of highly oxidized PMS microlatexes was caused by the reduc tion of total surface charge density due to the presence of carboxylic acid groups. (C) 1998 John Wiley & Sons, Inc.