1. Preparation of asymmetric particles by controlling the phase separation of seeded emulsion polymerization with ethanol/water mixture.
- Author
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Gui, Haoguan, Li, Yuanyuan, Du, Deming, Bo Meng, Qing, Song, Xi-Ming, and Liang, Fuxin
- Subjects
- *
PHASE separation , *POLYMERIZATION , *BENZYL chloride , *EMULSION polymerization , *MIXTURES , *ETHANOL , *SOL-gel processes - Abstract
[Display omitted] Alcohols are discovered for the first time to tune the morphology of poly(vinyl benzyl chloride)-poly(3-methacryloxypropyltrimethoxysilane) (PVBC-PMPS) composite particles through seeded emulsion polymerization within the alcohol/water mixture. Here, monodispersed linear PVBC particles was synthesized through the dispersion polymerization and employed as the seeds. The as-obtained PVBC-PMPS composite particles could be dramatically tuned from core-shell structures to snowman-like particles, to dumbbell-shaped particles, to inverse snowman-like particles when the ethanol content in reaction mixtures is only adjusted within a narrow range. The morphology of fresh PMPS bulges was observed after removing the linear PVBC seeds with N , N '-dimethyl formamide, and their formation mechanism was studied by monitoring the free radical polymerization and sol–gel process of 3-methacryloxypropyltrimethoxysilane. It has been confirmed that the sol–gel kinetics were the main factor on the particles' morphology. In addition, morphologies of PVBC-PMPS particles were also varied by the MPS feeding amount, types of the co-solvent and pH values of alcohol/water mixtures. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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