Polymer dispersed liquid crystal films formed by electron beam curing
First Claim
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1. A method for making a film containing microdroplets of a birefringent nematic and/or birefringent chiral nematic liquid crystal material dispersed in a polymer film comprising:
- mixing a liquid crystal material with the electron-beam curable liquid precursor mixture, said electron-beam curable liquid precursor mixture comprising a mercaptan activated allyl compound; and
thereaftercuring the mixture in the form of a film with an electron beam to thereby form a cured polymer matrix having therein droplets of liquid crystal material displaying positive dielectric anisotropy and/or positive diamagnetic anisotropy.
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Abstract
Optically responsive films comprising birefringent nematic and/or birefringent chiral nematic liquid crystal microdroplets dispersed in electron beam cured polymeric reaction products are disclosed.
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Citations
2 Claims
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1. A method for making a film containing microdroplets of a birefringent nematic and/or birefringent chiral nematic liquid crystal material dispersed in a polymer film comprising:
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mixing a liquid crystal material with the electron-beam curable liquid precursor mixture, said electron-beam curable liquid precursor mixture comprising a mercaptan activated allyl compound; and
thereaftercuring the mixture in the form of a film with an electron beam to thereby form a cured polymer matrix having therein droplets of liquid crystal material displaying positive dielectric anisotropy and/or positive diamagnetic anisotropy.
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2. A method for making a film containing microdroplets of a birefringent nematic and/or birefringent chiral nematic liquid crystal material dispersed in a polymer film comprising:
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mixing a liquid crystal material with the electron beam precursor mixture comprising triallyl isocyanurate and pentaerythritol tetrakis(2-mercapto-propanoate); and
thereaftercuring the mixture in the form of a film with a focused electron beam to thereby form a cured polymer matrix which is a reaction product of said precursors containing dispersed therein droplets of liquid crystal material displaying positive dielectric anisotropy and/or positive diamagnetic anisotropy.
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Specification