Formation Mechanism of Large Emulsion Particles in Emulsion Polymerization of Dimethylsiloxane I.Stability of Cationic Emulsions Towards Electrolytes

Chinese Journal of Applied Chemistry ›› 1994, Vol. 0 ›› Issue (2): 44-47.

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Formation Mechanism of Large Emulsion Particles in Emulsion Polymerization of Dimethylsiloxane I.Stability of Cationic Emulsions Towards Electrolytes

Huang Ying, Liu Xiangluan, Shi Tong

Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080

Received:1993-06-15 Revised:1993-12-10 Published:1994-04-10 Online:1994-04-10

Abstract

Abstract: The stability of polydimethylsiloxane cationic emulsions towards electrolytes was studied. The results indicate that inorganic salts such as NaCl or Na₂SO₄ from the emulsfier and catalyst during the emulsion polymerization may cause a slow coagulation of emulsion particles to form large emulsion particles which would result in creaming of the cationic emulsions. Addition of a non-ionic surfactant of polyethylene glycol oxide type greatly increases the stability of the cationic emulsions towards electrolytes, preventing the coagulation of emulsions particles and formation of large emulsion particles caused by electrolytes.

Key words: polydimethylsiloxane cationic emulsions, stability, emulsion particle

Huang Ying, Liu Xiangluan, Shi Tong. Formation Mechanism of Large Emulsion Particles in Emulsion Polymerization of Dimethylsiloxane I.Stability of Cationic Emulsions Towards Electrolytes[J]. Chinese Journal of Applied Chemistry, 1994, 0(2): 44-47.

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Formation Mechanism of Large Emulsion Particles in Emulsion Polymerization of Dimethylsiloxane I.Stability of Cationic Emulsions Towards Electrolytes

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