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Polymerization of maleic acid and itaconic acid studied by FT‐Raman spectroscopy
Author(s) -
Yang Charles Q.,
Gu Xiaohong
Publication year - 2001
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.1432
Subject(s) - itaconic acid , maleic acid , potassium persulfate , sodium hypophosphite , polymerization , raman spectroscopy , aqueous solution , polymer chemistry , chemistry , thermal decomposition , dicarboxylic acid , copolymer , organic chemistry , polymer , electroplating , physics , layer (electronics) , optics
In this research, we used a new redox free radical initiation system consisting of potassium persulfate (K 2 S 2 O 8 ) and sodium hypophosphite (NaH 2 PO 2 ). In the presence of NaH 2 PO 2 , the thermal decomposition of K 2 S 2 O 8 is accelerated, and the temperature required for the formation of free radical is reduced. We polymerized maleic acid (MA) using the K 2 S 2 O 8 /NaH 2 PO 2 initiation system in an aqueous solution, and monitored the polymerization process with FT‐Raman spectroscopy. The Raman spectroscopy data indicate the formation of a saturated carboxylic acid with the disappearance of the characteristic bands of MA as the thermal decomposition of K 2 S 2 O 8 progresses, thus indicating the formation of poly(maleic acid) (PMA). We also found that itaconic acid (IA) polymerizes in the presence of the new initiation system. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 223–228, 2001