FIELD: physics.
SUBSTANCE: photochromic triplex consists of two sheets of organic glass which are joined together by a photochromic cross-linked polymer, obtained from radical polymerisation of a photochromic acrylic composition. The acrylic composition is prepared by mixing liquid oligomers with two (meth)acrylic groups, with a flexible oligomer block and a rigid oligomer block, and a photochromic organic compound with subsequent introduction of a polymerisation initiator. The required amount of photochromic acrylic composition is poured into a mould made from two sheets of organic glass and the composition undergoes three-dimensionsl radical polymerisation with thermal or photochemical initiation.
EFFECT: triplexes with an elastic and strong inner layer also have good photochromic and optical properties.
10 cl, 9 tbl
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