Azo Polymers for Reversible Optical Storage. 5. Orientation and Dipolar Interactions of Azobenzene Side Groups in Copolymers and Blends Containing Methyl Methacrylate Structural Units

1995 ◽  
Vol 28 (18) ◽  
pp. 6116-6123 ◽  
Author(s):  
D. Brown ◽  
A. Natansohn ◽  
P. Rochon
Keyword(s):  
Methyl Methacrylate ◽  
Optical Storage ◽  
Dipolar Interactions ◽  
Structural Units ◽  
Azo Polymers

Azo Polymers for Reversible Optical Storage. 7. The Effect of the Size of the Photochromic Groups

1995 ◽  
Vol 28 (18) ◽  
pp. 6124-6127 ◽  
Author(s):  
M. S. Ho ◽  
A. Natansohn ◽  
P. Rochon
Keyword(s):  
Optical Storage ◽  
Azo Polymers

Azo Polymers for Reversible Optical Storage. 6. Poly[4-[2-(methacryloyloxy)ethyl]azobenzene]

1995 ◽  
Vol 28 (12) ◽  
pp. 4179-4183 ◽  
Author(s):  
Almeria Natansohn ◽  
Paul Rochon ◽  
Mei-Sing Ho ◽  
Chris Barrett
Keyword(s):  
Optical Storage ◽  
Azo Polymers

Nuclear magnetic resonance studies of ionomers. 5. Spectra of poly (methyl methacrylate-co-4-vinyl pyridine), poly (methyl methacrylate-co-2-methyl-5-vinyl pyridine), and their quaternized derivatives

1987 ◽  
Vol 65 (8) ◽  
pp. 1873-1881 ◽  
Author(s):  
Almeria Natansohn ◽  
Adi Eisenberg
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Methyl Methacrylate ◽  
Pyridine Ring ◽  
Main Chain ◽  
Structural Units ◽  
Poly Methyl Methacrylate ◽  
Nuclear Magnetic Resonance Spectra ◽  
Vinyl Pyridine ◽  
Nuclear Magnetic

Proton and carbon nuclear magnetic resonance spectra in solution of poly (methyl methacrylate-co-4-vinyl pyridine), poly(methyl methacrylate-co-2-methyl-5-vinyl pyridine), and of their derivatives obtained by quaternization with methyl iodide are presented. The vinyl pyridine structural units content of the samples is ca. 10%. In different solvents, the spectra provide information about the sequence distribution and configuration of the copolymers. A "coisotactic" alternating addition, defined as the probability of finding a methoxy group and a pyridine ring neighboring each other on the same side of the main chain, can be estimated as about 0.5 in both cases. This information arises from the splitting of the aromatic and of the methoxy signals (both in proton and carbon spectra). As expected, quaternization does not affect the copolymer configuration. Heteronuclear-correlated two-dimensional spectra can help in assigning the spectra.

AZO Polymers for Reversible Optical Storage

1992 ◽  
Vol 277 ◽  
Author(s):  
A. Natansohn ◽  
P. Rochon ◽  
J. Gosselin ◽  
S. Xie
Keyword(s):  
Second Harmonic ◽  
Optical Memory ◽  
Argon Laser ◽  
Optical Storage ◽  
Holographic Storage ◽  
Azo Polymers ◽  
Circularly Polarized ◽  
Writing Beam ◽  
Potential Applications ◽  
Azobenzene Groups

ABSTRACTAmorphous high-Tg polymers films containing electron-donor-electronacceptor substituted azobenzene groups can be used as reversible optical storage materials. Optical information can be “written” on the film with a polarized argon laser beam and “read” with a low power HeNe laser. Erasing can be performed with a circularly polarized writing beam. A significant number of writing/erasing cycles can be performed on the same spot. Potential applications in optical memory, holographic storage, waveguides and second harmonic generation are discussed.

Azo Polymers for Reversible Optical Storage. 9. Copolymers Containing Two Types of Azobenzene Side Groups

1996 ◽  
Vol 29 (1) ◽  
pp. 44-49 ◽  
Author(s):  
Mei-Sing Ho ◽  
Almeria Natansohn ◽  
Paul Rochon
Keyword(s):  
Optical Storage ◽  
Azo Polymers

Azo polymers for reversible optical storage: 13. Photoorientation of rigid side groups containing two azo bonds

Polymer ◽  
1997 ◽  
Vol 38 (11) ◽  
pp. 2677-2682 ◽  
Author(s):  
X. Meng ◽  
A. Natansohn ◽  
P. Rochon
Keyword(s):  
Optical Storage ◽  
Azo Polymers

Azo Polymers for Reversible Optical Storage. 10. Cooperative Motion of Polar Side Groups in Amorphous Polymers

1996 ◽  
Vol 29 (3) ◽  
pp. 946-952 ◽  
Author(s):  
X. Meng ◽  
A. Natansohn ◽  
C. Barrett ◽  
P. Rochon
Keyword(s):  
Amorphous Polymers ◽  
Optical Storage ◽  
Azo Polymers ◽  
Cooperative Motion

Azo polymers for reversible optical storage. 1. Poly[4'-[[2-(acryloyloxy)ethyl]ethylamino]-4-nitroazobenzene]

1992 ◽  
Vol 25 (8) ◽  
pp. 2268-2273 ◽  
Author(s):  
A. Natansohn ◽  
P. Rochon ◽  
J. Gosselin ◽  
S. Xie
Keyword(s):  
Optical Storage ◽  
Azo Polymers
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