New thermochromic light-controlling material

摘要: PROBLEM TO BE SOLVED: To obtain the subject material having high resistance to external stimulation such as ultraviolet ray or oxygen and reflecting light of a specific wavelength by using polymeric liquid crystal containing constant mesogen group, chiral compound group terminal chain. SOLUTION: This light-controlling uses random copolymer comprising monomer components formulae I II (X1 X2 are each H CH3 ; A is flexible chain; R1 B group; M group). Preferably, further contains formula III (X3 R2 chain) molar ratio made 0.30-0.98 I, 0.01-0.69 II, 0.01-0.50 total ratios three 1.