✦ LIBER ✦

ABC triblock polyampholytes containing a neutral hydrophobic block, a polyacid and a polybase

✍ Scribed by Ellen Giebeler; Reimund Stadler

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 791 KB
Volume: 198
Category: Article
ISSN: 1022-1352
DOI: 10.1002/macp.1997.021981204

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Well defined ABC triblock copolymers of polystyrene‐block‐poly(2‐vinylpyridine)‐block‐poly(tert‐butyl methacrylate) and polystyrene‐block‐poly(4‐vinylpyridine)‐block‐poly(tert‐butyl methacrylate) were synthesized by sequential living anionic polymerization in tetrahydrofuran. Triblock copolymers with narrow molecular weight distribution were obtained. Hydrolysis of the poly(tert‐butyl methacrylate) block yields polystyrene‐block‐polyvinylpyridine‐block‐poly(methacrylic acid) which demonstrates pH‐dependent solution properties. Interpolymer complexation of the polyvinylpyridine and poly(methacrylic acid) blocks in the micellar solution is studied in dependence of the pH in solution by potentiometric, conductometric and turbidimetric titration, and in bulk by FTIR spectroscopy.

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