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Amorphous, Elastic AB Copolymer Networks from Acrylates and Poly[( L ‐lactide)‐ ran ‐glycolide]dimethacrylates
Author(s) -
Kelch S.,
Choi N.Y.,
Wang Z.,
Lendlein A.
Publication year - 2008
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200700339
Subject(s) - materials science , copolymer , amorphous solid , acrylate , polymer , polymer chemistry , glass transition , composite material , ran , chemical engineering , organic chemistry , chemistry , engineering , biochemistry
Three series of amorphous AB copolymer networks with shape‐memory capabilities were obtained from poly[(L‐lactide)‐ran‐glycolide]dimethacrylate (DM) as crosslinker and ethylacrylate‐(AEt), butylacrylate‐(ABu), or hexyl acrylate (AHe) as comonomers. The switching temperature T sw of the shape‐memory effect could be adjusted between 9 °C to 45 °C. Strain fixity rates and strain recovery rates above 96 % could be reached. Compared to the homonetwork from DM, the incorporation of polyacrylate segments into the network led to a significant improvement of mechanical properties. Reaching higher elasticity and the possibility to adjust T sw to a temperature between room temperature and body temperature are considered to be substantial steps to improve the applicability of these polymer networks.