N. Oz et A. Akar, Aminomethylene phosphonic acid-ceric ion redox systems for aqueous polymerization of vinyl monomers, EUR POLYM J, 36(1), 2000, pp. 193-199
Aminomethylene phosphonic acids, such as amino tri(methylene phosphonic aci
d) (ATMP), 1-hydroxy-ethylidene-1,1-diphosphonic acid (HEDP), diethylene tr
iamine penta(methylene phosphonic acid) (DTPMPA), N,N-di(methylene phosphon
ic acid) ethanol amine (DMPEA), N,N-di(methylene phosphonic acid)-N-methyla
mine (DMPAMA), N-oxo-N,N,N-tri(methylene phosphonic acid) (OTMPA), and eeri
e ammonium nitrate odor systems are used for the polymerizations of acrylon
itrile, vinyl acetate, acrylic acid and acrylamide. The effects of concentr
ation of eerie ion and aminomethylene phosphonic acid on the yield and mole
cular 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 i
on and ATMP forms a primary radical on an ATMP molecule, which in turn init
iates polymerization to give polymer containing amino tri(methylene phospho
nic acid) chain end. (C) 1999 Elsevier Science Ltd. All rights reserved.