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Citation: ZHANG Bin, CHEN Ming-Cai, LIU Wei-Qu, TAN Jing. Preparation of Hydrophobically Modified Poly(acrylic acid) in Supercritical Carbon Dioxide[J]. Chinese Journal of Applied Chemistry, ;2004, 21(11): 1132-1135. shu

Preparation of Hydrophobically Modified Poly(acrylic acid) in Supercritical Carbon Dioxide

1.
Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650

Corresponding author: CHEN Ming-Cai,
Received Date: 15 December 2003
Available Online: 26 April 2004
Fund Project: 广东省自然科学基金(015007)资助课题 (015007)

Poly(acrylic acid) was hydrophobically modified with octadecyl acrylate in supercritical carbon dioxide. The copolymer obtained was white solid powder uniformly sized in about 0.2 μm as observed by SEM. The ratio of acrylic acid to octadecyl acrylate in the product by acid and base titration was found to be the same as the feed ratio. The solution viscosity of the copolymer dramatically increased with increase in pH value, and the solution of the hydrophobiclly modified poly(acrylic acid) showed good salt resistance.
- acrylic acid,
- octadecyl acrylate,
- supercritical carbon dioxide,
- hydrophobic association
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