Optical device having continuous and disperse phases
First Claim
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1. A optical body, comprising:
- a continuous phase and a disperse phase;
wherein at least one of said continuous and disperse phases comprises a first copolymer made from a blend of PEN and PET homopolymers, said copolymer having a mole % NDC composition of between about 75% and 50%, wherein the intrinsic viscosity of said copolymer is higher than that attainable from a second copolymer having the same monomers in the same ratio but not made from homopolymers.
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Abstract
An improved optical film having a continuous/disperse phase morphology and a method for making the same is provided. At least one of the continuous and disperse phases comprises a blend of homopolymers which are inter-reacted, as by transesterification. The resulting films exhibit a higher degree of birefringence for a given level of strain than analogous films in which the blend is replaced by a random copolymer.
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30 Claims
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1. A optical body, comprising:
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a continuous phase and a disperse phase;
wherein at least one of said continuous and disperse phases comprises a first copolymer made from a blend of PEN and PET homopolymers, said copolymer having a mole % NDC composition of between about 75% and 50%, wherein the intrinsic viscosity of said copolymer is higher than that attainable from a second copolymer having the same monomers in the same ratio but not made from homopolymers. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An optical body, comprising:
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a continuous phase and a disperse phase;
wherein at least one of said continuous and disperse phases comprises a first copolymer of at least first and second monomers, and wherein the number average sequence length of said first monomer in said first copolymer is greater than the number average sequence length of said first monomer in a second statistically random copolymer based on the same monomers and ratios of monomers as said first copolymer. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification