COMB-BRANCH CHIRAL LIQUID-CRYSTALLINE POLYMERS .4. COPOLYMERS OF (S)-2-[2-(4'-METHOXY-4-BIPHENYLOXY)-1-METHYL ETHOXY] ETHYL-METHACRYLATE AND A NONCHIRAL MESOGEN BASED ON ITACONIC ACID
Jmg. Cowie et Hw. Hunter, COMB-BRANCH CHIRAL LIQUID-CRYSTALLINE POLYMERS .4. COPOLYMERS OF (S)-2-[2-(4'-METHOXY-4-BIPHENYLOXY)-1-METHYL ETHOXY] ETHYL-METHACRYLATE AND A NONCHIRAL MESOGEN BASED ON ITACONIC ACID, European Polymer Journal, 32(3), 1996, pp. 295-298
An optically active monomer (S)-2-[2-(4'-methoxy-4-biphenyloxy)-methyl
ethoxy] ethyl methacrylate (3) with a chiral centre located in the sp
acer unit has been copolymerized with di-[6-(4'-methyl-4-biphenyloxy)h
exyl]-2-methylene butane-1,4-dioate (2) to give a range of copolymers
displaying either both smectic and chiral nematic or only chiral nemat
ic, liquid crystal phases. These samples displayed selective reflectio
n of visible light, the wavelength of which tended to shorten as the a
mount of chiral monomer in the copolymer increased. There was also evi
dence to suggest that the homopolymer of 3 reflects in the UV region.