Acid-Labile Surfactants Based on Poly(ethylene glycol), Carbon Dioxide and Propylene Oxide: Miniemulsion Polymerization and Degradation Studies.

ABSTRACT: Partially degradable, nonionic AB and ABA type di- and triblock copolymers based on poly(propylene carbonate) and poly(ethylene glycol) blocks were synthesized via immortal copolymerization of carbon dioxide and propylene oxide, using mPEG or PEG as a macroinitiator, and (R,R)-(salcy)-CoOBzF₅ as a catalyst in a solvent-free one-pot procedure. The amphiphilic surfactants were prepared with molecular weights (M_n) between 2800 and 10,000 g·mol^-¹ with narrow molecular weight distributions (1.03⁻1.09). The copolymers were characterized using ¹H-, ¹³C- and DOSY-NMR spectroscopy and size exclusion chromatography (SEC). Surface-active properties were determined by surface tension measurements (critical micelle concentration, CMC; CMC range: 1⁻1

SUBMITTER: Scharfenberg M 

PROVIDER: S-EPMC6419001 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature