Copolymerization of Acrylic Acid with Styrene in Supercritical Carbon Dioxide

Chem. J. Chinese Universities

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Copolymerization of Acrylic Acid with Styrene in Supercritical Carbon Dioxide

CAO Xian-Fu^1,2, CHEN De-Hong^1,2, ZHANG Liang-Liang^1,2, XU Kai¹, CHEN Ming-Cai¹

1. Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China;
2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

Received:2006-03-07 Revised:1900-01-01 Online:2006-11-10 Published:2006-11-10

Abstract

Abstract: A series of hydrophobically associating polymers were synthesized in suppercritical carbon dioxide by copolymerization acrylic acid with different amounts of styrene at 65℃. The effects of the pressure of CO₂ and the concentrations of styrene were observed. The structure and compositions of the copolymer were determined by IR, UV and ¹H NMR spectra. The products were perfect white solid powder. Different pressures and contents of styrene led to different morphology of the products and yields. The conversion of each comonomer was above 90% when the mass fration of styrene in the comonomers was below 5% at 15—19 MPa and 65 ℃. The viscosities of aqueous solution of the copolymers showed an obvious dependence on pH and shearing time, which suggests that the copolymers can hydrophobically associate in aquatic solution.

Key words: Supercritical carbon dioxide, Acrylic acid, Styrene, opolymerization, Hydrophobical association

CLC Number:

O631.5

TrendMD:

CAO Xian-Fu^1,2, CHEN De-Hong^1,2, ZHANG Liang-Liang^1,2, XU Kai¹, CHEN Ming-Cai¹. Copolymerization of Acrylic Acid with Styrene in Supercritical Carbon Dioxide[J]. Chem. J. Chinese Universities, doi: .

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Copolymerization of Acrylic Acid with Styrene in Supercritical Carbon Dioxide

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