Premium
The evaluation of the size and the structure of the interphase in composite particles containing a macromonomer studied by solid‐state NMR
Author(s) -
Landfester Katharina,
Dimonie Victoria L.,
ElAasser Mohamed S.
Publication year - 2002
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 - 10.1002/1521-3935(200208)203:12<1772::aid-macp1772>3.0.co;2-7
Subject(s) - macromonomer , interphase , materials science , butyl acrylate , composite number , polymer chemistry , acrylate , methyl methacrylate , spin diffusion , composite material , diffusion , polymer , chemical engineering , copolymer , thermodynamics , physics , biology , genetics , engineering
Abstract The degree of coverage and the structure and thickness of interphases in composite latex particles consisting of a poly(butyl acrylate) (PBA) core incorporated with poly(methyl methacrylate) (PMMA) macromonomer of different molecular weight and a PMMA shell was analyzed by using solid‐state NMR spin‐diffusion measurements. By changing the temperature at a given filter strength or by adjusting the filter strength at a given temperature, the spin‐diffusion experiment could be performed in such a way that the overall structure could be detected. At filter strengths softer than necessary for the detection of the overall structure, information regarding larger structures can be obtained, whereas for stronger filters detailed information about small structures in the interphase region can be extracted. The data obtained by NMR were related to previous TEM and dynamic mechanical studies on these particles.