Paper Title:
Encapsulation of Nanometer CaCO3 by Polymer Network
  Abstract

Stearic acid coated nanometer CaCO3 was encapsulated by polystyrene (PS) network via emulsion polymerization, where a polyfunctional monomer trimethyol propane trimethacrylate (TMPTMA) or divinyl benzene (DVB) was used as crosslinker. The feed modes of monomer and initiator are investigated. Batch mode is shown to be more convenient than semi-continuous mode in view of network perfection. With the amount of crosslinkers increased from 1 wt% to 7 wt%, the percentage of unextractable PS is high (not lower than 95%) for all samples in the system of TMPTMA, while this value decreases sharply from 74% to 3% in the system of DVB. The yield in the system of DVB is higher than that of TMPTMA. With increased amount of CaCO3, encapsulation ratio can be varied from 5.2 to 2.6, while the yield and unextractable PS decrease. FT-IR spectra of the products after extraction indicate tight encapsulation between PS and CaCO3, and TEM photographs of composite particles give direct evidence of encapsulation.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
1005-1008
DOI
10.4028/www.scientific.net/MSF.475-479.1005
Citation
W. F. Liu, Z. X. Guo, J. Yu, "Encapsulation of Nanometer CaCO3 by Polymer Network", Materials Science Forum, Vols. 475-479, pp. 1005-1008, 2005
Online since
January 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Gang Qiang Geng, Xin Jun Liu, Gong Xun Bian
Abstract:With silane coupling agent on silica aerogels by modification pretreatment, we obtained the core-shell structure of polystyrene grafted...
93
Authors: Hong Bo Liu, Ji Hu Wang, Shao Guo Wen, Wen Jun Gan, Qian Xu, Yan Shen
Abstract:Spherical C@PSt microspheres with average size around 2 μm were successfully prepared using high-speed homogenization-assisted suspension...
1148
Authors: Yun Lin Fu, Yong Feng Li, Yi Xing Liu, Bao Gang Wang
Abstract:A novel Wood-Polymer Composite, Wood-PSt composite combining both advantages of wood and polystyrene was fabricated by determining the...
1419
Authors: Ren Jie Wang, Kai Guo, Wei Hua Fan, Xiao Yu Liu, Yu Kun Liu, Jin Zhou Chen, Xin Fa Li
Chapter 12: Micro-Electronic Packaging Technology and Equipment
Abstract:The tens of micrometers sized polystyrene(PS) microspheres were produced by dispersion polymerization in ethanol/H2O medium with poly(N-vinyl...
2686
Authors: Xiao Na Wang, Qin Yan Yue
Chapter 1: Materials Science and Engineering, Material Forming and Processing, Applied Mechanics
Abstract:The inverse microemulsion copolymerization of poly (dimethyl diallyl ammonium chloride-acrylamide) (PDMDAAC-AM) has been studied using a...
174