TY - JOUR
T1 - Investigation of the intramolecular structure of styrene-ethylmethacrylate copolymers by 1H- and 13C-NMR : reassignment of H-NMR spectra
AU - Tacx, J.C.J.F.
AU - Velden, van der, G.P.M.
AU - German, A.L.
PY - 1988
Y1 - 1988
N2 - The compositions and sequence distributions of homogeneous styrene (S)–ethyl methacrylate (E) copolymers, obtained by low conversion solution polymerization have been studied by 1H- and 13C-NMR. A new set of peak triad assignments was proposed for the d 2.1–4.2 ppm region in the 1H-NMR spectrum, whereby the reactivity ratios of rS = 0.59 and rE = 0.50 were used to establish this new assignment. The EEE and SSS blocks, present in these copolymers, have a high degree of syndiotacticity (sEE = 0.23, sSS = 0.39), whereas the ESE units are exhibiting a slight tendency toward isotacticity (sES = 0.66).
AB - The compositions and sequence distributions of homogeneous styrene (S)–ethyl methacrylate (E) copolymers, obtained by low conversion solution polymerization have been studied by 1H- and 13C-NMR. A new set of peak triad assignments was proposed for the d 2.1–4.2 ppm region in the 1H-NMR spectrum, whereby the reactivity ratios of rS = 0.59 and rE = 0.50 were used to establish this new assignment. The EEE and SSS blocks, present in these copolymers, have a high degree of syndiotacticity (sEE = 0.23, sSS = 0.39), whereas the ESE units are exhibiting a slight tendency toward isotacticity (sES = 0.66).
U2 - 10.1002/pola.1988.080260516
DO - 10.1002/pola.1988.080260516
M3 - Article
SN - 0887-624X
VL - 26
SP - 1439
EP - 1456
JO - Journal of Polymer Science, Part A: Polymer Chemistry
JF - Journal of Polymer Science, Part A: Polymer Chemistry
IS - 5
ER -