Structural color body
A structural color body is film-like and formed of a resin layer containing a block copolymer, the resin layer has a micro-phase separated structure including lamellar micro domains, each of the micro domains has a wave-like shape having amplitudes in the thickness direction of the structural color body, and in each of the micro domains, a maximum value of distances in the direction between the tops of convexities and the bottoms of concavities is larger than the wavelength in the visible light range.
1. A structural color body having a first principal surface and a second principal surface opposed to each other, wherein
the structural color body is film-like and is composed of a resin layer containing a block copolymer,
the resin layer has a micro-phase separated structure including lamellar micro domains,
each of the micro domains has a wave-like shape having amplitudes in a thickness direction of the structural color body, and
in each of the micro domains, a maximum value of distances in the thickness direction between tops of convexities and bottoms of concavities of the micro domain is larger than a wavelength in a visible light range.
2. The structural color body according to claim 1 , wherein a thickness of the structural color body is 100 to 1000 μm.
3. The structural color body according to claim 1 , wherein a weight-average molecular weight of the block copolymer is equal to or more than 8.0×10 5 .
4. The structural color body according to claim 1 , wherein the resin layer further contains a polymer compound obtained by polymerizing a composition containing at least one kind of photopolymerizable monomer selected from the group consisting of acrylates and methacrylates.
5. The structural color body according to claim 1 , wherein the resin layer further contains at least one kind selected from the group consisting of phthalate ester, adipate ester, phosphate ester, trimellitate ester, citrate ester, epoxy compound and polyester.