Aminomethylene phosphonic acid-ceric ion redox systems for aqueous polymerization of vinyl monomers


Oz N. , AKAR A.

EUROPEAN POLYMER JOURNAL, cilt.36, ss.193-199, 2000 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 36 Konu: 1
  • Basım Tarihi: 2000
  • Doi Numarası: 10.1016/s0014-3057(99)00034-8
  • Dergi Adı: EUROPEAN POLYMER JOURNAL
  • Sayfa Sayıları: ss.193-199

Özet

Aminomethylene phosphonic acids, such as amino tri(methylene phosphonic acid) (ATMP), 1-hydroxy-ethylidene-1,1-diphosphonic acid (HEDP), diethylene triamine penta(methylene phosphonic acid) (DTPMPA), N,N-di(methylene phosphonic acid) ethanol amine (DMPEA), N,N-di(methylene phosphonic acid)-N-methylamine (DMPAMA), N-oxo-N,N,N-tri(methylene phosphonic acid) (OTMPA), and eerie ammonium nitrate odor systems are used for the polymerizations of acrylonitrile, vinyl acetate, acrylic acid and acrylamide. The effects of concentration of eerie ion and aminomethylene phosphonic acid on the yield and molecular weight show that oxidative termination reaction becomes important at higher eerie concentration and considerable chain-transfer reaction occurs at higher ATMP concentration. The redox reaction in the complex: of eerie ion and ATMP forms a primary radical on an ATMP molecule, which in turn initiates polymerization to give polymer containing amino tri(methylene phosphonic acid) chain end. (C) 1999 Elsevier Science Ltd. All rights reserved.