Effect of Shell Thickness on Morphology and Opacity Ability of Hollow Styrene Acrylic Latex Particles
YUAN Teng1,2, LIANG Bin1, HUANG Jiajian1, YANG Zhuohong1, SHAO Qinghui2
1 College of Materials and Energy, South China Agricultural University, Guangzhou 510642; 2 School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640
Abstract: Based on the preparation of hollow styrene-acrylic latex particles by three-layer cross-linking alkali swelling method, in this work the effects of shell thickness on morphology and opacity ability of hollow polymer latex particles were investigated via characterizations of particle size analysis, viscosity measurement, SEM, TEM and UV-Vis spectrophotometry. The results confirmed the significant effect of shell layer thickness on the hollow latex particles. An increasing shell thickness can result in a biphasic(increase → decrease) change in size of the latex particles, which has a minimum value while shell/intermediate layer thickness ratio is 7, and also a monotonically decreasing latex viscosity. Moreover, when the shell thickness increases, the hollow polymer latex particles undergo a decrease of surface roughness, less rupture and collapse, and a “rise and fall” change in opacity ability. The most satisfactory shell/intermediate layer ratio of the latex were determined to be 7—9.
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