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Influence of the Polymethacrylate Chain Conformation in Langmuir–Blodgett–Kuhn Films on the Glass‐Transition Temperature
Author(s) -
Kügler R.,
Knoll W.
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(20020401)203:7<923::aid-macp923>3.0.co;2-w
Subject(s) - glass transition , langmuir–blodgett film , polymer , x ray photoelectron spectroscopy , methacrylate , polymer chemistry , neutron reflectometry , spectroscopy , materials science , protonation , chemistry , chemical engineering , copolymer , molecule , organic chemistry , neutron scattering , ion , neutron , small angle neutron scattering , composite material , physics , quantum mechanics , engineering
Langmuir–Blodgett–Kuhn (LBK) multilayer assemblies of poly(ethyl methacrylate) (PEMA) were analyzed by X‐ray‐ (XR) and neutron reflectometry (NR). The preparation of alternating stacks of perdeuterated and protonated layers allowed for the determination of the inner layer structure via NR. The depression of the glass‐transition temperature T g of these thin films was examined by surface plasmon spectroscopy (SPS) and waveguide spectroscopy (WGS). The depression of a relaxation temperature of the chains in LBK film was measured and related to the T g depression of spincoat systems. The T g depression appeared to be independent of the conformation of the polymer chains.