15657-91-7Relevant articles and documents
Novel PDLC films based on A photoactive polymeric binder
Manni, Alessandro,Gobbi, Luigi,Simoni, Francesco,Klapper, Markus,Knoll, Wolfgang
, p. 281 - 291 (2003)
We report the synthesis and characterization of a novel polymeric material which has been used as binder in the fabrication of PDLC films. A monomer bearing a carbazolyl moiety has been copolymerized, using azobisisobutyrronitrile (AIBN) as initiator, with a monomer containing a mesogenic core. PDLC films have been prepared using copolymers with different composition in the two monomers. A. detailed morphological analysis has been carried out to evaluate a correlation between the copolymer composition and the PDLC film morphologies.
Synthesis and Morphology of Two Carbazole-Pyrazoline-Containing Polymer Systems and Their Electrical Memory Performance
Lu, Cai-Jian,Li, Hua,Xu, Qing-Feng,Xu, Qing-Hua,Lu, Jian-Mei
, p. 1354 - 1362 (2015/08/11)
A new atom-transfer radical polymerization (ATRP) initiator 4-[1-(2-dodecyl-1,3-dioxo-2,3-dihydro-1H-benzo[de]isoquinolin-6-yl)-3-(4-nitrophenyl)-4,5-dihydro-1H-pyrazol-5-yl]phenyl 2-bromo-2-methylpropanoate (IN) as an electron acceptor (A) and a monomer 2-(9H-carbazole-9-yl)-ethyl methacrylate (MCz) as an electron donor (D) were simultaneously introduced into two different D-A polymer systems by using the end-functionalizing or blending method. The mass percentage of IN in the end-functionalized polymer PMCz-IN and the mixed polymer composite PMCz+IN were both controlled at approximately 1.0wt. The optical, electrochemical, and surface morphology properties of the two polymeric films prepared by means of spin-coating technology were comparatively investigated. Sandwich devices based on PMCz-IN and PMCz+IN demonstrated nonvolatile write-once-read-many-times memory (WORM) and volatile static random access memory (SRAM) characteristics, respectively, which were further verified by the Kelvin probe force microscopy (KPFM) measurements. The proposed memory mechanism could be attributed to the formation of a stable charge-transfer (CT) complex for PMCz-IN and an unstable CT complex for PMCz+IN. Furthermore, the different distribution of IN in the two polymeric films might be the main reason for the stability of the CT complex.
Well-defined fluoro- and carbazole-containing diblock copolymers: Synthesis, characterization and immobilization onto Au-coated silicon surfaces
Savva, Ioanna,Demetriou, Maria,Othonos, Andreas,Turcu, Rodica,Popa, Adriana,Macavei, Sergiu,Krasia-Christoforou, Theodora
, p. 8741 - 8751 (2015/03/03)
A series of well-defined diblock copolymers consisting of 2-(N-carbazolyl)ethyl methacrylate (CbzEMA) and 2,2,3,3,4,4,4-heptafluorobutyl methacrylate (HFBMA) (CbzEMAx-b-HFBMAy) was synthesized by Reversible Addition-Fragmentation chain Transfer (RAFT) polymerization. All polymers were characterized in terms of molecular weights, molecular weight distributions and chemical compositions using Size Exclusion Chromatography (SEC), Fourier Transform Infrared (FTIR) spectroscopy and Proton Nuclear Magnetic Resonance (1H NMR) spectroscopy, respectively. The thermal properties (glass transition and decomposition temperatures) of the CbzEMAx and HFBMAx homopolymers and the CbzEMAx-b-HFBMAy diblock copolymers were determined by Differential Scanning Calorimetry (DSC) and Thermal Gravimetric Analysis (TGA). As demonstrated by photoluminescence measurements, immobilization of the dithioester-ended functionalized CbzEMAx-b-HFBMAy chains onto Au-coated silicon surfaces has been accomplished via anchoring of the sulfur-containing end-groups onto the Au surfaces. The presence of the low-surface energy fluorinated block, combined with the electro-active carbazole-containing segment within CbzEMAx-b-HFBMAy diblock copolymers imparts to these immobilized thin layers useful properties towards their potential applicability in gas sensing technologies.
