Optically active polyurethane-amide material and preparation method thereof

Abstract

The invention aims to provide an optically active polyurethane-amide material and a preparation method thereof. The material is obtained by copolymerization of L or D-tyrosine derivative bisphenol monomer, diisocyanate and organic diacid monomer and has the structural formula in the specification. The glass transition temperature of the material is 150-200 DEG C, the thermal decomposition temperature is 300-350 DEG C and the specific rotation absolute value at room temperature is 30-100 degrees.

Description

technical field The invention relates to an optically active polyurethane-amide material and a preparation method thereof, belonging to the preparation category of organic functional polymer materials. Background technique Polyurethane materials are widely used in automobiles, construction, machinery, aerospace, electronics and other fields due to their excellent wear resistance, oil resistance and elastic-plastic properties. However, the heat resistance of ordinary polyurethane materials is poor, and its mechanical properties such as tensile strength and elastic modulus will drop significantly at 80-90°C, which limits its application range to a certain extent. Therefore, the research and development of high thermal stability polyurethane has been generally paid attention to by people. Introducing polymer functional groups with different properties into the polymer chain structure is one of the important means to improve the performance of materials. For example, polyimide...

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Problems solved by technology

However, ordinary polyurethane materials have poor heat resistance, and their mechanical properties such as tensile strength and elastic modulus will drop significantly at 80-90°C, which limits their application range to a certain extent.