US4962160A
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Side chain liquid crystalline polymers exhibiting nonlinear optical response
Assignee: Corning Inc
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Filing: 1987-12-01
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Granted: 1990-10-09
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Expires: 2007-12-01
Abstract
Abstract This invention provides novel side chain liquid crystalline polymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in electrooptic light modulator devices. An invention side chain liquid crystalline polymer is illustrated by poly[6-(4-nitrobiphenyloxy)hexyl methacrylate]: ##STR1##
Inventors
- 👤 Ronald N. DeMartino
- 👤 Hyun-Nam Yoon
- 👤 James B. Stamatoff
- 👤 Alan Buckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:38
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617; C; C08; C08F; C08F8/00; C08F8/30; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3876; C09K19/388; C09K19/40; C09K19/406; C09K19/408
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
61 words
A thermotropic liquid crystalline polymer having a comb structure of mesogenic side chains which comprise at least about 25 weight percent of the polymer, wherein the polymer has a glass transition temperature above about 40° C., and the mesogens exhibit a second order nonlinear optical susceptibility β of at least about 5×10 -30 esu as measured at 1.91 μm excitation wavelength.
Claim 2
Dependent Claim
61 words
A thermotropic liquid crystalline polymer having a comb structure of mesogenic side chains which comprise at least about 25 weight percent of the polymer, wherein the polymer has a glass transition temperature above about 40° C., and the mesogens exhibit a second order nonlinear optical susceptibility β of at least about 5×10 -30 esu as measured at 1.91 μm excitation wavelength.
Claim 3
Dependent Claim
17 words
A liquid crystalline polymer in accordance with claim 1 wherein the main chain is a polyvinyl structure.
Claim 4
Dependent Claim
17 words
A liquid crystalline polymer in accordance with claim 1 wherein the main chain is a polysiloxane structure.
Claim 5
Dependent Claim
17 words
A liquid crystalline polymer in accordance with claim 1 wherein the main chain is a polyoxyalkylene structure.
Claim 6
Dependent Claim
14 words
A liquid crystalline polymer in accordance with claim 1 which exhibits a smectic mesophase.
Claim 7
Dependent Claim
15 words
A transparent nonlinear optical medium comprising a liquid crystalline polymer in accordance with claim 1.
Claim 8
Dependent Claim
20 words
A nonlinear optical medium in accordance with claim 6 which is characterized by an external field-induced orientation of aligned mesogens.
Claim 9
Dependent Claim
104 words
A thermotropic liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR24## where P is a polymer main chain unit, S is a flexible spacer group having a linear chain length of between about 0-20 atoms, M is a pendant mesogen which exhibits a second order nonlinear optical susceptibility β of at least about 20×10 -30 esu as measured at 1.91 μm excitation wavelength, and where the pendant mesogens comprise at least about 10 weight percent of the polymer and have an external field-induced molecular alignment, and the polymer has a glass transition temperature above about 60° C.
Claim 10
Dependent Claim
104 words
A thermotropic liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR24## where P is a polymer main chain unit, S is a flexible spacer group having a linear chain length of between about 0-20 atoms, M is a pendant mesogen which exhibits a second order nonlinear optical susceptibility β of at least about 20×10 -30 esu as measured at 1.91 μm excitation wavelength, and where the pendant mesogens comprise at least about 10 weight percent of the polymer and have an external field-induced molecular alignment, and the polymer has a glass transition temperature above about 60° C.
Claim 11
Dependent Claim
18 words
A thermotropic liquid crystalline polymer in accordance with claim 8 wherein the main chain is a polyvinyl structure.
Claim 12
Dependent Claim
18 words
A thermotropic liquid crystalline polymer in accordance with claim 8 wherein the main chain is a polysiloxane structure.
Claim 13
Dependent Claim
18 words
A thermotropic liquid crystalline polymer in accordance with claim 8 wherein the main chain is a polyoxyalkylene structure.
References Cited (Backward Citations)
US4293435A
Cited
US4713196A
Cited
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