Fluorine-Containing Polymer Solubility in Aprotic Solvents
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Solution Overview
Problem
Existing methods for producing fluorine-containing polymers struggle to achieve high concentrations of these polymers in aprotic solvents, particularly with polymers containing fluorine-containing aliphatic rings.
Innovation Solution
A composition comprising a fluorine-containing polymer with a structural unit containing a fluorine-containing aliphatic ring, dissolved in an aprotic solvent at a concentration of 20 mass % or more, where the aliphatic ring contains one, two, or three etheric oxygen atoms as ring-constituting atoms, and these oxygen atoms are not adjacent to each other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorine-containing polymer with fluorine-containing aliphatic ring is used, then polymer performance is improved, but solubility in aprotic solvent deteriorates
Solution Approach 1:
The patent changes the chemical structure parameters of the fluorine-containing polymer by introducing specific etheric oxygen atoms into the aliphatic ring at non-adjacent positions. This structural modification alters the polymer's solubility parameters, enabling it to dissolve in aprotic solvents at high concentrations (20 mass % or more) while maintaining its functional performance characteristics.
2Productivity
If polymer concentration in aprotic solvent is increased, then productivity is improved, but solubility deteriorates
Solution Approach 1:
By modifying the polymer structure to include etheric oxygen atoms at specific non-adjacent positions in the aliphatic ring, the patent changes the intermolecular interaction parameters between polymer and solvent. This enables the system to achieve high polymer concentrations (20 mass % or more) in aprotic solvents without precipitation, directly resolving the solubility-concentration trade-off.
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 method allows for the production of a fluorine-containing polymer that can be dissolved at high concentrations in aprotic solvents, overcoming the solubility challenges faced by previous technologies.
Implementation Method 1
A composition comprising (A) a fluorine-containing polymer comprising as a main component a structural unit containing a fluorine-containing aliphatic ring; and (B) an aprotic solvent
Data Source
AI summary
An object of the present disclosure is to provide a method for producing a fluorine-containing polymer and a composition containing the fluorine-containing polymer. The present disclosure provides a composition comprising (A) a fluorine-containing polymer comprising as a main component a structural unit containing a fluorine-containing aliphatic ring, and (B) an aprotic solvent, wherein the fluorine-containing aliphatic ring of the fluorine-containing polymer (A) contains one, two, or three etheric oxygen atoms as a ring-constituting atom; when the fluorine-containing aliphatic ring contains a plurality of etheric oxygen atoms, the etheric oxygen atoms are not adjacent to each other; and the fluorine-containing polymer (A) is present in an amount of 20 mass % or more based on the mass of the composition.