Preparation of soap‐free cationic emulsion using polymerizable surfactant

Abstract

A kind of polymerizable surfactant, methacryloyloxyethylhexadecyldimethylammonium bromide (DMHB) was used to synthesis soap-free cationic emulsion with styrene (St), methyl methacrylate (MMA), and methacryloyloxyethyltrimethylammonium chloride (MATMAC) by emulsion polymerization using 2,2Ј-azobis(isobutylamidine hydrochloride) (AIBA) as a cationic initiator. The effects of polymerizable surfactant concentration, initiator concentration, and reaction temperature on the conversion of monomer were investigated. The results indicated that the rate of polymerization could be expressed as R p ϭ k p [AIBA] 0.42 [DMHB] 0.45 and the apparent activation energy (E a ) was 83.42 kJ/mol. The particle size, potential, and apparent charge density of cationic latices were also measured. The average diameter of copolymer particles decreased with increasing DMHB, MATMAC, and AIBA content; the charge properties of the particles were decided by the DMHB, MATMAC, and AIBA content. The polymerization mechanism is discussed.

Preparation of cationic functional polymer latexes and measurement of involatile monomer conversion

“…Cationic functional monomer methacryloxy ethylhexadecyl dimethylammonium bromide (DMHB) was synthesized through the reaction between dimethylaminoethyl methacrylate and n ‐hexadecanebromide as schematized in Scheme . The full details for the preparation and the characterization of the target product have been previously described 13, 14…”

Part 1 : Soap-Free Emulsion Copolymerization of Styrene with COPS-I

“…높은 표면전하를 가지는 라텍스는 전기적 반발력에 의 해 규칙적인 삼차원적 입자 배열성과 전기 영동성을 높 이고, 고분자의 큰 굴절률은 광결정의 반사율을 증가시 킨다 [9][10][11][12][13]. 무유화중합은 [14][15][16][17][18] 계면활성제의 첨가없이 이온성 개시제 또는 이온성 공단량체를 [4,9,10,11,[19][20][21][22][23][24] 사용하여 단분산성이 우수하고 높은 표면전하를 갖는 고분자 미립자를 제조하는 방법으로 최근에는 광학 또는 감지기능을 갖는 새로운 콜로이드 광결정 재료 [1][2][3][4][5][6][7] 제조에 사용되고 있다.…”

Synthesis of polymeric emulsifiers based on ketoaldehyde resin and their application in emulsifying styrene/water two‐phase system

“…Therefore, the stability period of emulsion is not as long as possible. In order to overcome the above problems, many methods including application of reactive emulsifiers and polymeric emulsifiers or soap‐free emulsion have been explored 5–10 . In comparison with small molecular emulsifiers, steric‐hindrance effect arising from polymer chains plays another role in stabilizing emulsions for polymeric emulsifiers.…”