Thermotropic and Optical Properties of Chiral Nematics Polymers.

摘要

The thermotropic and optical properties of methacrylate copolymers and chemically modified poly(gamma-benzyl Levorotary-glutamate) were investigated as part of our effort to explore the optical applications of these materials. It was found that besides the commonly cited comonomer ratio, physical blending and annealing followed by quenching represent a new and more flexible means of tune the selective reflection wavelength. In the chemically modified poly(gamma-benzyl Levorotary-glutamate)system with Tg as low as -25 C, it appears that the relatively high-melt viscosity is capable of sustaining the cholesteric mesophase, generated by annealing and quenching, while subjected to heating up to 100 C. Keywords: Chiral nematic polymers; Optical properties; Polymers thermotropic properties; Reprints. (kt)