Sulfur-Containing Polymer Composition for High-Refractive Optical Materials
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Solution Overview
Problem
Existing sulfur-containing polymers do not have sufficiently high refractive indices and lack the physical properties required for various optical applications, such as heat resistance, mechanical strength, and adhesion to substrates.
Innovation Solution
A sulfur-containing polymer with specific structural units and reactive functional groups, combined with an inorganic substance, to achieve high refractive index and improved optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional sulfur-containing polymers are used, then the polymer can be produced with basic sulfur content, but the refractive index is not sufficiently high
Solution Approach 1:
The patent changes the chemical structure parameters of the polymer by introducing specific structural units (formulae 1-3) with sulfur atoms bonded to aromatic rings, and by controlling the degree of polymerization and molecular weight distribution to achieve a refractive index of 1.70 or higher while maintaining manufacturability through established polymerization methods
Solution Approach 2:
The patent creates a composite polymer system combining sulfur-containing polymer chains with aromatic hydrocarbon structures, where the synergistic combination of sulfur atoms (providing high refractive index) and aromatic rings (providing structural stability) achieves both high optical performance and manufacturing feasibility
2Illumination intensity
If polymer materials are designed to have high refractive index, then optical performance is improved, but physical properties such as heat resistance and mechanical strength are compromised
Solution Approach 1:
The patent applies local quality by placing sulfur atoms at specific locations within the polymer chain (bonded to aromatic rings at positions defined in formulae 1-3) rather than uniformly distributing sulfur throughout, allowing high refractive index in the optical-active regions while maintaining mechanical strength in the structural backbone
Solution Approach 2:
The patent creates a composite structure where sulfur-containing units are integrated with aromatic hydrocarbon frameworks, combining the high refractive index property of sulfur with the mechanical strength and heat resistance of aromatic polymers to achieve both optical and mechanical performance simultaneously
3Illumination intensity
If sulfur-containing polymers are synthesized to achieve high refractive index, then optical applications become viable, but adhesion to substrates is insufficient
Solution Approach 1:
The patent makes the polymer structure multi-functional by incorporating both optical functions (high refractive index through sulfur atoms) and adhesion functions (through functional groups in formulae 1-3 that can bond to substrates), allowing a single polymer material to simultaneously achieve high refractive index and good substrate adhesion for optical applications
Data Source
AI summary
The present invention aims to provide a polymer material that has a high refractive index and can be suitably used for applications such as optical applications. The present invention relates to the sulfur-containing polymer containing at least one structural unit selected from the group consisting of a structural unit (A) represented by the following formula (1), a structural unit (B) represented by the following formula (2), and a structural unit (C) represented by the following formula (3); and a reactive functional group,wherein X1, X2, and X3 are the same as or different from each other and are each an optionally substituted divalent aromatic hydrocarbon group.