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Preparation of photochromic polymers by stereospecific copolymerization of trans ‐4‐(2‐methacryloxyethyloxy)azobenzene and (−)‐menthyl methacrylate
Author(s) -
Altomare A.,
Ciardelli F.,
Lima R.,
Solaro R.
Publication year - 1991
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1991.220020101
Subject(s) - azobenzene , photochromism , copolymer , methacrylate , materials science , polymer chemistry , monomer , stereospecificity , chromophore , polymer , tacticity , photochemistry , polymerization , organic chemistry , chemistry , catalysis , nanotechnology , composite material
Abstract The synthesis is reported of a new photochromic monomer, trans ‐4‐(2‐methacryloxyethyloxy) azobenzene (MEAB), where the azobenzene chromophore is separated from the ester group by an ethylenoxy spacer arm. Comparative experiments show that trans ‐4‐methacryloxyazobenzene (MAB), having the azobenzene group directly attached to the ester functionality, does not homopolymerize or copolymerize with (−)‐menthyl methacrylate (MnMA) in the presence of different anionic initiators, whereas isotactic homopolymers and copolymers of MEAB can be obtained: the microstructure is described with reference to analogous atactic macromolecules.