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Preparing of monodisperse and cation-charged polystyrene particles stabilized with polymerizable quarternary ammonium by dispersion polymerization in a methanol–water medium

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Abstract.
A novel dispersion polymerization system, with a methanol/water (MeOH/H2O) mixture as reaction medium
and a polymerizable dimethylaminomethacrylate methyl chloride (DMC) as stabilizer was developed.
By monitoring the polymerization evolution and observing the morphological changes of the
polystyrene (PS) particles by SEM, it was found that this system had the following unique features: (1)
a much lower amount of DMC (0.025 mass% based on styrene as opposed to 5 mass% for a routine system)
was required to prepare monodisperse and stable PS particles; (2) the rate of polymerization was fast and
the conversion was very high; (3) the monodisperse particles with average diameters of approximately
200–1600 nm could be directly obtained. These features were explained by a synergistic interaction
between water and the quarternary ammonium cations. Combined with XPS, ion-exchange/conductometric
titration, FTIR and 1H NMR analysis, a plausible polymerization mechanism through which the particles were stabilized by the PS-PDMC copolymer formed in situ was proposed.

Keywords:
Dispersion polymerization
Cation charged
Polystyrene
Microspheres

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Colloid and Interface Science

No. Panggil

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Penerbit

London : Elsevier Inc.., 2009

Deskripsi Fisik

Journal of Colloid and Interface Science 334 (2009) 13–21

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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