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Reversible Switching of the Shear Modulus of Photoresponsive Liquid‐Crystalline Polymers
Author(s) -
Verploegen Eric,
Soulages Johannes,
Kozberg Mariel,
Zhang Tejia,
McKinley Gareth,
Hammond Paula
Publication year - 2009
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200900583
Subject(s) - liquid crystalline , mesophase , rheology , polymer , siloxane , materials science , liquid crystal , molecule , chemical engineering , modulus , conformational change , polymer chemistry , chemistry , composite material , organic chemistry , stereochemistry , optoelectronics , engineering
Manipulation makes light work : The morphology and rheological properties of a liquid‐crystalline system can be dynamically manipulated with UV light by attaching photoresponsive liquid‐crystalline moieties to a siloxane‐based polymer. Stimulation with UV light induces a conformational change in the molecule, which disrupts the liquid‐crystalline mesophase (see picture), and results in a dramatic change in its rheological properties.