Blue Light Absorbing Polymer with Covalent Backbone Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing polymers used in plastic containers often suffer from blue light-induced degradation and tint issues when blue light absorbers are blended with them, and these absorbers can leach out, affecting the product's quality and appearance.
Innovation Solution
A polymer is developed with blue light absorbing units chemically bonded to its polymeric backbone, using functionalized p-vinylstyrylanthracene monomers, which are polymerized with olefin monomers to create a material with specific blue light absorption characteristics, reducing leaching and visual impact, and allowing for tailored absorption profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If blue light absorbers are blended with polymer to inhibit blue light damage, then blue light absorption is improved, but yellow tint is induced in the container
Solution Approach 1:
The patent combines the blue light absorbing function and the polymer matrix into a single integrated material system. The blue light absorbing monomer is chemically incorporated into the polymer backbone during polymerization, creating a homogeneous copolymer where the absorbing units are covalently bonded to the polymer chains. This merging eliminates the need for separate additive blends and prevents phase separation that causes yellowing.
Solution Approach 2:
The patent creates a composite polymer material by copolymerizing olefin monomers with blue light absorbing monomers. The resulting copolymer combines the structural properties of the olefin matrix with the optical absorption properties of the blue light absorbing units. This composite approach allows tailoring of both mechanical and optical properties through monomer selection and composition control.
2Object-affected harmful factors
If blue light absorbers are blended with polymer, then blue light absorption is improved, but blue light absorption peak shifts occur
Solution Approach 1:
The patent controls the absorption peak position by adjusting the chemical structure of the blue light absorbing monomer units incorporated into the polymer. By modifying substituents on the anthracene core (such as electron-donating or electron-withdrawing groups), the absorption spectrum can be precisely tuned to target specific blue light wavelengths. The copolymer composition ratio is also controlled to fine-tune the overall absorption characteristics.
3Object-affected harmful factors
If blue light absorbers are blended with polymer, then blue light absorption is improved, but absorbers leach out of the blend
Solution Approach 1:
The blue light absorbing units are chemically merged with the polymer backbone through covalent bonding formed during copolymerization. This chemical integration ensures that the absorbing units become an integral part of the polymer structure rather than separate additives, eliminating leaching issues entirely. The absorbing units are locked into the polymer chains and cannot separate or migrate.
Solution Approach 2:
The patent uses small amounts of blue light absorbing monomer (less than 10 wt% of total monomers) to achieve the desired absorption effect. This minimal incorporation reduces the total amount of absorbing material needed while maintaining effectiveness, and the chemical bonding ensures long-term stability without leaching.
4Object-affected harmful factors
If functionalized p-vinylstyrylanthracene monomers are used, then blue light absorption characteristics are tailored, but processing complexity increases
Solution Approach 1:
The blue light absorbing functional groups are pre-installed on the anthracene monomer structure before polymerization. This preliminary functionalization allows the monomer to be directly incorporated into the copolymer with the desired absorption characteristics already built-in, eliminating the need for post-polymerization modification steps and simplifying the overall processing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The polymer effectively absorbs blue light, inhibiting degradation and tint issues while maintaining processing characteristics, with blue light absorption characteristics that can be tailored to specific needs, ensuring product quality and appearance are preserved.
Implementation Method 1
The polymer includes greater than 0.5 percent by weight of units derived from one or more blue light absorbing monomers... The polymer effectively absorbs blue light, inhibiting degradation and tint issues
Implementation Method 2
one or more functionalized p-vinylstyrylanthracene monomers, which are polymerized with olefin monomers to create a material with specific blue light absorption characteristics
Data Source
AI summary
A process of forming a polymer with a blue light absorber chemically bonded to a polymeric backbone of the polymer includes mixing one or more olefin monomers with one or more functionalized p-vinylstyrylanthracene monomers to form a mixture of reactants. The mixture includes less than 10 percent by weight of the one or more functionalized p-vinylstyrylanthracene monomers. The process also includes polymerizing the mixture to produce a polymer with one or more blue light absorption characteristics.