Linear addition polymer with hyperpolarizable side groups

Abstract

Abstract A linear addition polymer having sidegroups which may be coupled to it or not through a spacer and have a molecular hyperpolarizability beta of at least 10<-><3><8> m<4>/V, characterized in that the recurring units of the polymer correspond to the formula <CHEM> wherein X represents a hydrogen atom or a lower alkyl group and m = 1 or optionally 0, where when m = 1 Y represents a <CHEM> group and R has the meaning of a) a hyperpolarizable group having a molecular hyperpolarizability beta of at least 10<-><3><8> m<4>/V, in the presence or not of a spacer, and optionally along with b) a mesogenic group in the presence or not of a spacer, and/or c) a hydrogen atom or a substituted or unsubstituted organic group having not more than 30 carbon atoms, and when m = 0 Y represents a -CN, a substituted or unsubstituted phenyl group or a group of the formula -OR1 or -CH2OR1, wherein R1 has the meaning of a hydrogen atom or a substituted or unsubstituted aliphatic group having not more than 20 carbon atoms, provided that - at least 10% of the recurring units in the polymer contain a hyperpolarizable group having a molecular hyperpolarizability beta of at least 10<-><3><8> m<4>/V, - at the most 40% of the recurring units in the polymer contain a mesogenic group, and - that the quotient of the degree of substitution of the recurring units with a group having a molecular hyperpolarizability beta of at least 10<-><3><8> m<4>/V and the average molecular weight of R with the meaning given under b and c amounts to at least 5 x 10<-><4>, a non-linear optical medium thereof oriented in an electric field and electro-optical laminates comprising such a non-linear optical medium.

Inventors

• 👤 Carel T. J. Wreesmann
• 👤 Erwin W. P. Erdhuisen

Bibliographic Details