Enhancement of mechanical and optical performance of commercial polystyrenes by blending with siloxane-based copolymers

NINAGO, MARIO DANIEL; HANAZUMI, VIVINA; PASSARETTI, MARÍA GABRIELA; VEGA, DANIEL ALBERTO; CIOLINO, ANDRÉS EDUARDO; VILLAR, MARCELO ARMANDO

JOURNAL OF APPLIED POLYMER SCIENCE

JOHN WILEY & SONS INC

Año: 2017 vol. 134 p. 1 - 9

0021-8995

Well-defined poly(styrene-block-dimethylsiloxane) copolymers (PS-b-PDMS) with low polydispersity index (Mw/Mn) and different compositions were synthesized by sequential anionic polymerization of styrene (S) and hexamethyl(ciclotrisiloxane) (D3) monomers. Synthesized PS-b-PDMS copolymers were characterized by 1H-nuclear magnetic resonance (1H-NMR), size exclusionchromatography (SEC), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The physicochemical characterization determined that block copolymers have molar mass values close to 135,000 g/mol, narrow Mw/Mn