Algers, John; Skeppstedt, Viktoria; Sperr, Peter; Egger, Werner; Maurer, Frans H. J.
Document type:
Zeitschriftenartikel / Journal Article
Title:
Thermal Isomerization of Azo-Benzene in PMMA Probed by a Pulsed Low-Energy Positron Beam
Journal:
Materials Science Forum
Issue:
445-446
Year:
2004
Pages from - to:
262-264
Language:
Englisch
Abstract:
Polymers containing the Azo-benzene group have attracted attention due to anticipated uses such as materials for data storage, membranes with controllable permeability and materials with changeable solubility [1; 2]. These expectations are due to the change in shape and dipole moment of the Azo-compound when excited by photo isomerization from the trans-state to the cis-state by UV light of ca 360 nm. Films of copolymers of poly-methyl methacrylate (PMMA) containing 8 wt-