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Polymerization of acrylamide in the presence of calcium sulfate dihydrate and calcium sulfate hemihydrate
Author(s) -
Stav Elisha,
Bentur Ar,
Kohn David H.
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070451203
Subject(s) - acrylamide , chemistry , polymerization , calcium , sodium bisulfite , persulfate , sulfate , bisulfite , potassium sulfate , inorganic chemistry , potassium persulfate , nuclear chemistry , potassium , organic chemistry , polymer , biochemistry , monomer , gene expression , dna methylation , gene , catalysis
The homopolymerization of acrylamide in water alone and also in the presence of calcium sulfate dihydrate and of calcium sulfate hemihydrate has been studied. Polymerizing acrylamide with the redox pair potassium persulfate—sodium bisulfite, the rate increased steadily with increasing initiator concentration. In the presence of up to 25% dihydrate, the rate was like that of acrylamide alone. However, when adding the “reactive” hemihydrate that is hydrated to the dihydrate concurrently with the progressing polymerization, the rate is somewhat slower in comparison with the two other systems. For determination of the compositions of the various reaction products, a method combining DTA and XRD data has been developed.