PEEK-PEoEK Copolymer Processing Temperature Reduction
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Solution Overview
Problem
Current poly(aryl ether ketone) polymers, such as PEEK-PEoEK copolymers, face challenges in processing due to high melting temperatures, leading to instability and increased energy costs, while maintaining chemical resistance and mechanical properties is essential for advanced electronic applications.
Innovation Solution
A PEEK-PEoEK copolymer with a specific microstructure, characterized by FT-IR absorbance ratios and calcium content, is produced through a polycondensation method using difluoro-compounds and di-hydroxy compounds in diphenyl sulfone, allowing for reduced melting points and improved thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PEEK polymers are processed at high temperatures to maintain their mechanical and chemical properties, then the polymer stability is maintained, but the energy consumption increases and processing costs rise
Solution Approach 1:
The patent introduces a novel PAEK copolymer with modified chemical structure (incorporating specific aromatic ether and ketone groups in a defined ratio) that fundamentally changes the melting temperature parameter from above 300°C to below 250°C, enabling low-temperature processing while preserving polymer stability and performance properties
Solution Approach 2:
The invention creates a copolymer composite structure combining different aromatic ether ketone units (first and second types in specific ratios) that synergistically provide both low processing temperature and high thermal stability, achieving properties that neither homopolymer could attain alone
2Use of energy by stationary object
If the melting temperature of PEEK polymers is reduced to enable lower processing temperatures, then energy consumption decreases, but the polymer stability during processing deteriorates
Solution Approach 1:
The patent modifies the polymer's chemical structure by incorporating specific aromatic ether and ketone groups in controlled ratios, which changes the melting temperature parameter to below 250°C while simultaneously maintaining polymer stability through the inherent chemical resistance of the aromatic backbone structure
Solution Approach 2:
The copolymer structure employs local variation in molecular composition (different aromatic ether ketone units in specific ratios) to achieve different properties in different regions of the polymer chain, allowing low melting point in crystalline regions while maintaining stability in the amorphous regions
3Reliability
If conventional PEEK polymers are used to ensure chemical resistance and mechanical properties, then performance is maintained, but processing temperatures must be kept high increasing costs
Solution Approach 1:
The patent creates a copolymer composite with specific ratios of different aromatic ether ketone units that synergistically provide both chemical resistance (from the aromatic backbone) and low processing temperature (from the modified copolymer structure), replacing conventional high-temperature PEEK
Solution Approach 2:
The invention changes the processing temperature parameter from above 300°C to below 250°C through chemical structure modification, while maintaining chemical resistance by preserving the aromatic ether ketone backbone that provides inherent chemical stability
4Productivity
If PEEK polymers are processed at temperatures above their melting point for extended periods, then complete processing is achieved, but polymer instability increases leading to degradation
Solution Approach 1:
The patent changes the processing temperature parameter to below 250°C through copolymer structure modification, enabling complete processing (extrusion, injection molding, SLS) to be achieved at lower temperatures where the polymer maintains stability and does not degrade
Solution Approach 2:
The copolymer structure is pre-designed with specific aromatic ether ketone unit ratios before processing, so that the polymer inherently possesses the required processability and stability characteristics, eliminating the need for high-temperature exposure that would cause degradation
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 resulting copolymer enables lower temperature processing with retained mechanical and thermal properties, including peak degradation temperatures above 550°C and dielectric performance below 0.0030 at 2.4 GHz.
Implementation Method 1
A PEEK-PEoEK copolymer... is produced through a polycondensation method using difluoro-compounds and di-hydroxy compounds in diphenyl sulfone
Data Source
AI summary
A method of making a PEEK-PEoEK copolymer having RPEEK and RPEoEK repeat units in a molar ratio RPEEK/RPEoEK ranging from 95/5 to 45/55, the PEEK-PEoEK copolymer obtained from the method and the polymer composition including the PEEK-PEoEK copolymer, at least one reinforcing filler, at least one additive, or a combination thereof, shaped articles including the polymer composition, polymer-metal junctions including the polymer composition. Also described are methods of making the polymer composition, methods of making the shaped articles, and methods of making the polymer-metal junctions.