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Dynamic Behavior of the Minority Phase of Photoaddressable Block Copolymers
Author(s) -
Kreger Klaus,
Löffler Christina,
Walker Roland,
Wirth Nadine,
Bingemann Dieter,
Audorff Hubert,
Rössler Ernst A.,
Kador Lothar,
Schmidt HansWerner
Publication year - 2007
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/macp.200700120
Subject(s) - copolymer , materials science , polystyrene , glass transition , phase (matter) , polymer chemistry , phase transition , solid state , diffraction , polymer , chemical engineering , chemistry , thermodynamics , composite material , optics , organic chemistry , physics , engineering
Abstract We present an analysis of the temperature‐dependent dynamic behavior of the minority phase of photoaddressable block copolymers. Solid‐state 2 H NMR investigations are compared with holographic experiments. The samples are diblock copolymers based on polystyrene (PS) and poly(1,2‐butadiene) (PB), where the PB minority segment is functionalized with different deuterated moieties. Solid‐state 2 H NMR investigations were performed from 320 to 380 K in order to study the thermal behavior of the minority segment. Holographic experiments on thin films of the block copolymers yielded the photoinduced diffraction efficiency at different temperatures. The comparison of both datasets enables us to identify the glass transition temperature T g of the minority phase.