Citation: Yong Zhong DU, Fu Qiang HU, Hong YUAN, Shinzo OMI. Thermal Emulsion Polymerization without any Conventional Initiators and Emulsifiers[J]. Chinese Chemical Letters, ;2006, 17(4): 553-556. shu

Thermal Emulsion Polymerization without any Conventional Initiators and Emulsifiers

1.
College of Pharmaceutical Science, Zhejiang University, 353 Yanan Road, Hangzhou 310031;
2.
Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan

Received Date: 8 September 2005

Stable poly(styrene-co-sodium styrene suffonate) (P(St-NaSS) nanoparticles with broader size distribution were synthesized by thermal emulsion polymerization without any conventional initiators and emulsifiers. The obtained polymer nanoparticles have higher ξ potential, and the particle sizes have broad distribution. The stability of polymer particles originated from the addition of small amounts of ionic comonomer, NaSS, which can act as an emulsifier in somewhat. The monomer conversion could reach up to about 28 wt% in 48 h, and did not increase by further polymerization when higher polymerization temperature (120℃) was employed. This polymerization system may be give some further understand for mechanism of emulsion polymerization.
- Thermal emulsion polymerization,
- latex particles,
- styrene,
- sodium styrene sulfonate
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