TY - JOUR
TI - Synthesis of a model 3-miktoarm star terpolymer
AU - Hermis Iatrou
AU - Nikos Hadjichristidis
JO - Macromolecules
PY - 1992
VL - 25
TODO - 18
SP - 4649--4651
PB - American Chemical Society (ACS)
SN - 0024-9297, 1520-5835
TODO - 10.1021/ma00044a028
TODO - Characterization;  Chemical reactions;  Polybutadienes;  Polyisoprenes;  Polystyrenes;  Synthesis (chemical), Living polymers;  Methyltrichlorosilane;  Polyisoprenyllithium, Terpolymers
TODO - The synthesis of a well-defined, near monodisperse, star terpolymer with three different arms, i.e., polyisoprene, polystyrene, and polybutadiene, is described. The synthetic approach involves the reaction of polyisoprenyllithium with an excess of methyltrichlorosilane followed, after removed of the excess of methyltrichlorosilane, by a stoichiometric addition (titration) of polystyrillithium and finally by a small excess of polybutadienyllithium. The sequence of the addition of the different living polymers is very critical. After linking, the excess of the polybutadienyllithium was terminated with methanol and removed by fractionation. Characterization was carried out by size-exclusion chromatography, low-angle laser light scattering, laser differential refractometry, osmometry, and NMR and UV spectroscopy. © 1992, American Chemical Society. All rights reserved.
ER -