Premium
Synthesis and characterization of ABA‐triblock copolymers with polystyrene and main‐chain liquid crystalline polyester segments
Author(s) -
Reichelt Norbert,
Schulze Uwe,
Schmidt HansWerner
Publication year - 1997
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1997.021981212
Subject(s) - copolymer , polystyrene , polyester , polymer chemistry , characterization (materials science) , chain (unit) , polymer science , liquid crystalline , materials science , polymer , nanotechnology , composite material , physics , astronomy
This paper reports on the synthesis and characterization of polystyrene‐ block ‐poly(2,2′‐dimethyl‐4,4′‐biphenylene phenylterephthalate)‐ block ‐polystyrene. The ABA‐triblock copolymers were synthesized by condensation reactions of telechelic poly(2,2′‐dimethyl‐4,4′‐biphenylene phenylterephthalate) with anionically prepared ω‐hydroxy polystyrenes. Three different lengths of the liquid‐crystalline polyester ( M̄ n = 2650, 5 500, 10 100 g/mol) were used as central block B. The number‐average molecular weight M̄ n of the polystyrene segments was varied in the range of 690 to 10 000 g/mol. The liquid crystalline behavior and the transition temperatures are discussed with respect to the molecular weight of the polystyrene segments and the block copolymer composition. A comparison with the corresponding polymer blends is given and first results on the morphology of the block copolymers are presented.