HE Tao, HU Hongqi, CHEN Mingcai, LU Shehui, LIU Hongbo. COPOLYMERIZATION OF FLUOROCARBON-MODIFIED POLY(ACRYLIC ACID) IN SUPERCRITICAL CARBON DIOXIDE[J]. Acta Polymerica Sinica, 2004,(2):228-231.
HE Tao, HU Hongqi, CHEN Mingcai, LU Shehui, LIU Hongbo. COPOLYMERIZATION OF FLUOROCARBON-MODIFIED POLY(ACRYLIC ACID) IN SUPERCRITICAL CARBON DIOXIDE[J]. Acta Polymerica Sinica, 2004,(2):228-231.DOI:
1-dihydroperfluorooetyl acrylate (FOA) and acrylic acid (AA) was obtained in supercritical CO2(SC-CO2) Compared with the traditional methods
the yield ratio of FOA using SC-CO2 is increased at lower temperature
the reaction time is shortened from 24 h to only 4 h
and the products are easier to be treated.At the same time it was found that temperature played an important role in these reactions.The FOA monomer is more active than the AA monomer in low temperature(TT> 60.0℃) the activity of AA monomer improved greatly The viscosity of aqueous solutions of the copolylmers rises up dramatically with the increase of fluorocarbon content
and the viscosity of the eopolymets versus pH values shows a peak
both of results evidenced the hydmphobic association of macmmoleeules in solutions.