摘要:
A process to produce a polymer liquid crystalline composition having temperature dependency of desired circular polarization selective reflection wave length property by only mixing two or more kinds of starting materials having different weight-average molecular weight comprising, mixing two or more kinds of rigid rodlike helical polymers with chiral side chains having different weight-average molecular weight synthesized from same molecules and having same repeating unit whose molecular weight distribution defined by the ratio of weight average molecular weight/number average molecular weight is from 1.00 to 1.25, and controlling weight average molecular weight, number average molecular weight and molecular weight distribution by mixing ratio.
摘要:
A process to produce a polymer liquid crystalline composition having temperature dependency of desired circular polarization selective reflection wave length property by only mixing two or more kinds of starting materials having different weight-average molecular weight comprising, mixing two or more kinds of rigid rodlike helical polymers with chiral side chains having different weight-average molecular weight synthesized from same molecules and having same repeating unit whose molecular weight distribution defined by the ratio of weight average molecular weight/number average molecular weight is from 1.00 to 1.25, and controlling weight average molecular weight, number average molecular weight and molecular weight distribution by mixing ratio.
摘要:
Disclosed are a liquid crystal display element exhibiting a continuous gradation memory property as well as different display properties substantially similar to those of a liquid crystal display element having nematic liquid crystals, while enabling continuous tone display, and a method for manufacturing the same.
摘要:
Disclosed are a liquid crystal display element exhibiting a continuous gradation memory property as well as different display properties substantially similar to those of a liquid crystal display element having nematic liquid crystals, while enabling continuous tone display, and a method for manufacturing the same.
摘要:
Disclosed are: a method for production of a polyisocyanide derivative having a stable helical main chain structure with a right-handed or left-handed helix or a mixture thereof from a single type of monomer by polymerizing an aromatic isocyanate having a substituent harboring a structure —CONH in the aromatic ring and a hydrophobic moiety having 6 or more carbon atoms in a polymerization solvent, wherein the direction of the helix depends on the polarity of the polymerization solvent; a poly(aromatic isocyanide) derivative produced by the method; and an aromatic isocyanide which is useful as a monomer for use in the production of the poly(aromatic isocyanide) derivative.
摘要:
A three-dimensional display is provided with a display device alternatively displaying an image for the right eye and an image for the left eye in division of the images at predetermined time periods. A liquid crystal shutter disposed in front of the display device is operated in synchronization with image switching of the display device, and the image transmitted through the liquid crystal shutter is observed as a three-dimensional image through polarized glasses of which polarizing directions differ in the right and left from each other. The liquid crystal cell which serves as a liquid crystal shutter has a structure of a ferroelectric liquid crystal held between two sheets of resin film substrates and the ferroelectric liquid crystal contains more than 10 wt % of ferroelectric liquid crystal polymer so that it can respond to a large size display device and a high speed motion. A retardation plate to compensate elliptical polarization of the polarized glasses prevents lowering of contrast of the display due to the elliptical polarization peculiar to the operation mode of the liquid crystal cell and reduces a double reflection of the image, by setting the condition of |&Dgr;n1d1−&Dgr;n2d2|≦50 nm in the range of light wavelength from 400 nm through 900 nm, for the retardation (&Dgr;n1d1) of the retardation plate and a retardation (&Dgr;n2d2) of a liquid crystal cell forming the liquid crystal shutter.
摘要:
Novel optically active polyacetylene derivatives exhibiting liquid crystallinity; liquid crystal compositions containing the derivatives; and moldings thereof. Specifically, polyacetylene derivatives which have helical structure of rigid-rod shape and which exhibit a liquid crystal phase either in a solvent containing an organic solvent as the main component or in a molten state as well as electric field orientation; liquid crystal compositions containing the derivatives; and moldings thereof. More specifically, polyacetylene derivatives having helical structure of rigid-rod shape as represented by the general formula [1]; liquid crystal compositions containing the derivatives; and moldings thereof: wherein R1 and R2 are each independently aminocarbonyl of an amino acid having an ester linkage with C2-22 alkyl or carbonylamino of an amino acid having an amide linkage with C2-22 alkyl, the amino acid being achiral one, or chiral one of (S)- or (R)-configuration, or a racemic mixture composed of both antipodes; and X is a number satisfying the relationship: 0
摘要:
Novel optically active polyacetylene derivatives exhibiting liquid crystallinity; liquid crystal compositions containing the derivatives; and moldings thereof. Specifically, polyacetylene derivatives which have helical structure of rigid-rod shape and which exhibit a liquid crystal phase either in a solvent containing an organic solvent as the main component or in a molten state as well as electric field orientation; liquid crystal compositions containing the derivatives; and moldings thereof. More specifically, polyacetylene derivatives having helical structure of rigid-rod shape as represented by the general formula [1]; liquid crystal compositions containing the derivatives; and moldings thereof: wherein R1 and R2 are each independently aminocarbonyl of an amino acid having an ester linkage with C2-22 alkyl or carbonylamino of an amino acid having an amide linkage with C2-22 alkyl, the amino acid being achiral one, or chiral one of (S)- or (R)-configuration, or a racemic mixture composed of both antipodes; and X is a number satisfying the relationship: 0
摘要:
The object is to provide: a method for producing a polymer having a stable right-handed or left-handed helical structure from a single type of monomer in a per-selective manner and controlling the proportion between a polymer having the right-handed helical structure and a polymer having the left-handed helical structure; and a polymeric material which can be used for the formation of any of the right-handed and left-handed helical structures. Thus, disclosed are: a method for production of a polyisocyanide derivative having a stable helical main chain structure with a right-handed or left-handed helix or a mixture thereof from a single type of monomer by polymerizing an aromatic isocyanate having a substituent harboring a structure —CONH in the aromatic ring and a hydrophobic moiety having 6 or more carbon atoms in a polymerization solvent, wherein the direction of the helix depends on the polarity of the polymerization solvent; a poly(aromatic isocyanide) derivative produced by the method; and an aromatic isocyanide which is useful as a monomer for use in the production of the poly(aromatic isocyanide) derivative.