TIT# Chemical modification of styrene-butadiene block copolymers
AUT# Ghioca, P.; Buzdugan, E.; Iovu, M. C.; Badea, E. G.; Stribeck, N.
SOU# Mater. Plast. (1998), 35, 45-50
LOC# xv044 @selbst.ftx
CLA#
COM#
APP#
MAT#
ABS# Ionomers with $-NH_3\}^+X^-$ groups have been synthesized by chemical
     modification of some commercial radial styrene-butadiene block copolymers.
     The method includes bromination of polybutadiene blocks by addition of
     elemental bromine to the double bonds, followed by quaternarization with
     triethylamine of brome-derivative. The quaternalization is practically
     total, according to IR spectra. The ionomer anion-exchange capacity is
     relatively close to the theoretical values. Dynamic mechanical analysis
     (DMA) and mechanical studies were performed on the ionomers as well.