Study on the Precipitation Polymerization of Acrylamide and Methacrylic Acid in Ethanol by Conductimetry: Phase- Separation Prior to Polymerization
作者： Min Li , Hen Mei Ni
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.455-456.639
关键词:
摘要: Conductimetry was employed to investigate the precipitation polymerization of acrylamide/methacrylic acid (AAm/MAA) in ethanol (EtOH). The conductivity change vs. temperature AAm/MAA-EtOH as well effects monomer ratio and concentration studied. An abrupt decrease observed at ca 25°C, indicating phase separation monomers EtOH. As ratios AAm/MAA increased from 2/1 5/1 (wt/wt), 22 31°C. higher concentration, is lower. These results proved that lyophobicity methyl group MAA dominated system AAm/MAA-EtOH, by which microspheres were prepared, heterogeneous prior polymerization.
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