6533b7cefe1ef96bd1256d48

RESEARCH PRODUCT

Small angle scattering study of poly(methylmethacrylate)-block-poly(ethylene oxide) block co-polymer in aqueous solution

Roberto TrioloFabrizio Lo CelsoValerio BenfanteAlessandro TrioloA. WiedenmannS. Bernstorff

subject

Small Angle Scattering Di-Block Copolymer Micelles Structuretechnology industry and agriculture

description

A combined Small Angle X ray (SAXS) and Neutron (SANS) Scattering study of aqueous solutions of a symmetric block copolymer consisting of poly(methyl methacrylate) (PMMA) and poly(ethylene oxide) (PEO) moieties is presented. The polymer forms slightly polydisperse spherical micelles in a wide range of concentration (0.03 – 6.7 w/V) and temperature (20°C ≤ T ≤ 65°C). A good description of the SANS data is obtained using a polydisperse core-shell model with a structure factor for a modified hard sphere potential. By increasing the concentration at constant T we observed a decrease of the aggregation number and an increase of solvation of PEO groups in the shell, opposite to what happens by increasing the temperature at constant concentration.

yearjournalcountryeditionlanguage
2005-01-01
http://www.cnr.it/prodotto/i/66395