LIGHT-POLARIZING FILMS OF UNSATURATED CYCLIC POLYMER

摘要

A light-polarizing film is made from a polymer which is electrically conductive (e.g. by addition of an electron-receptor or donor) and dichroic, and contains an unsaturated cyclic structure in its main chain. General formulae are given of five polymers or precursors. The manufacture of the film is described, by uniaxially stretching the film or its precursor, optionally mixed with or laminated to a supporting polymer. The film is usable e.g. in a LCD element and has good polarisation and durability qualities.