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Citation: MENG Yong, WENG Zhi-Xue, SHAN Guo-Rong, HUANG Zhi-Ming, PAN Zu-Ren. Preparation of Polysiloxane/Acrylate Core-Shell Composite Particles by Seeding Emulsion Polymerization[J]. Chinese Journal of Applied Chemistry, ;2004, 21(2): 169-173. shu

Preparation of Polysiloxane/Acrylate Core-Shell Composite Particles by Seeding Emulsion Polymerization

1.
Institute of Polymer Engineering, Zhejiang University, Hangzhou 310027

Corresponding author: WENG Zhi-Xue,
Received Date: 22 May 2003
Available Online: 3 September 2003
Fund Project: 高等学校国家重点实验室(硅材料国家重点实验室)访问学者基金资助 (硅材料国家重点实验室)

The high organosilicone content(m(polysiloxane):m(MMA)=7:6) polysiloxane/acrylates copo-lymer latex with core-shell structure was prepared by seeding emulsion polymerization from methyl methacrylate(MMA) with polysiloxane latex as a seed. The effects of feeding mode of MMA and preparation conditions(temperature, concentrations of initiator, reaction time) on the kinetics of polymerization, the average particle size and its distribution, and the morphology of the obtained particles were studied. The composite emulsifier of sodium lauryl sulphate and OP-10 appeared to be a preferable emulsifier system in the preparation of polysiloxane/MMA copolymer latex with the excellent storage. The increase of polymerization temperature, concentrations of initiator and emulsifier increases the polymerization rate. Higher concentration of emulsifier gave smaller size. In comparison with single polymerization, the seeding polymerization process with MMA was more preferable for preparing a stable copolymer latex with smaller particle size and narrower distribution. The TEM photos show that the composite particles have clear core/shell structure, but the particles obtained by single polymerization have irregular shape.
- methyl methacrylate,
- polysiloxane,
- seeding emulsion polymerization,
- core-shell latex
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