Polyarylene Ether Sulfone Particle Agglomeration for Uniform Processing
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Solution Overview
Problem
Existing methods for producing polyarylene (ether) sulfone particles lack high purity and uniform processability, leading to challenges in manufacturing high-quality goods such as fibers, molded articles, and membranes, particularly for thin-walled articles and filaments.
Innovation Solution
A process for producing polyarylene (ether) sulfone particles involves agglomerating fine-particle material with controlled moisture and ambient air conditions, resulting in particles with specific moisture and temperature parameters, and using amorphous polyarylene (ether) sulfone with additives homogeneously dispersed to achieve uniform grain size and reduced caking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyarylene sulfone is produced by conventional methods using carbon monoxide and sulfur trioxide, then the polymer can be synthesized, but the process requires sophisticated equipment and strict exclusion of moisture and oxygen leading to high production costs
Solution Approach 1:
The invention changes the reaction parameters by replacing the conventional carbon monoxide/sulfur trioxide system with a dimethyl carbonate/sulfur trioxide system, allowing the reaction to proceed under milder conditions with simpler equipment and without strict moisture exclusion requirements
Solution Approach 2:
The invention uses dimethyl carbonate as a safer, more handleable alternative to carbon monoxide, which is toxic and requires specialized handling equipment, thereby simplifying the overall process setup and reducing equipment complexity
2Reliability
If polyarylene sulfone is produced using conventional methods, then the polymer can be synthesized, but the process is time-consuming and leads to high production costs
Solution Approach 1:
The invention changes the reaction parameters by using dimethyl carbonate instead of carbon monoxide, enabling the reaction to proceed faster under milder conditions, thereby reducing production time and improving efficiency
Solution Approach 2:
The invention enables continuous polymerization without the need for strict moisture exclusion and with simpler equipment, allowing for more efficient continuous production processes that reduce overall production time
3Manufacturing precision
If conventional polymerization methods are used with carbon monoxide, then polyarylene sulfone can be produced, but the process requires strict exclusion of moisture and oxygen increasing operational complexity
Solution Approach 1:
The invention changes the chemical parameters by using dimethyl carbonate and sulfur trioxide instead of carbon monoxide and sulfur trioxide, allowing the reaction to tolerate moisture and oxygen, thereby greatly simplifying operational requirements while maintaining polymer composition control
Solution Approach 2:
The invention uses dimethyl carbonate as an intermediary reagent that reacts with sulfur trioxide to form the desired polymer without requiring the strict exclusion of moisture and oxygen that would be necessary if using carbon monoxide directly
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 process yields high-purity, uniformly processable particles with improved throughput, suitable for producing transparent films, foils, and moldings with reduced corrosion and caking, and supports recycling of edge trim from these products.
Implementation Method 1
The reaction of sulfur trioxide with dimethyl carbonate gives a complex which, on reaction with an aromatic compound in the presence of a base, affords polyarylene (ether) sulfone
Data Source
Figure 1
AI summary
A process for the production of particles comprising polyarylene (ether) sulfone, comprising the agglomeration of fine-particle material comprising polyarylene (ether) sulfone, particles comprising polyarylene (ether) sulfone and a process for the recycling of a foam, of a foil ormembrane, or of a molding, or of edge trim from the production of a coating, of a foam, of afoil or membrane, or of a molding comprising the production of comminuted material therefrom and the agglomeration to give recyclate particles.