TY - JOUR
T1 - Synthesis of amphiphilic polystyrene-ionene diblock copolymers with controlled block lengths
AU - Schipper, E.T.W.M.
AU - Hest, van, J.C.M.
AU - Roelofs, A.H.C.
AU - Piet, P.
AU - German, A.L.
PY - 1993
Y1 - 1993
N2 - Amphiphilic polystyrene (I)-ionene diblock copolymers with blocks of controlled mol. wts. were synthesized by a new method. The prepn. starts with the anionic polymn. of styrene with 3-(dimethylamino)propyllithium as initiator, yielding tertiary amino end-functionalized I of mol. wts. that can be varied from 1-100 kg/mol, and a relatively low polydispersity (.hivin.Mw/.hivin.Mn = 1.1-1.4). The crucial step in this method is the stepwise coupling of the reactive end-group of the I with bromo- and tertiary-amino-terminated monodisperse oligomeric 2,4-ionenes. The amphiphilic polymers with well-defined block lengths were characterized by thin-layer chromatog., end-group titrn., and elemental anal. Amphiphilic block copolymers with a monodisperse ionene block consisting of ?10 quaternary ammonium groups could be derived
AB - Amphiphilic polystyrene (I)-ionene diblock copolymers with blocks of controlled mol. wts. were synthesized by a new method. The prepn. starts with the anionic polymn. of styrene with 3-(dimethylamino)propyllithium as initiator, yielding tertiary amino end-functionalized I of mol. wts. that can be varied from 1-100 kg/mol, and a relatively low polydispersity (.hivin.Mw/.hivin.Mn = 1.1-1.4). The crucial step in this method is the stepwise coupling of the reactive end-group of the I with bromo- and tertiary-amino-terminated monodisperse oligomeric 2,4-ionenes. The amphiphilic polymers with well-defined block lengths were characterized by thin-layer chromatog., end-group titrn., and elemental anal. Amphiphilic block copolymers with a monodisperse ionene block consisting of ?10 quaternary ammonium groups could be derived
U2 - 10.1002/pi.4990310402
DO - 10.1002/pi.4990310402
M3 - Article
SN - 0959-8103
VL - 31
SP - 317
EP - 322
JO - Polymer International
JF - Polymer International
IS - 4
ER -