Fluorine Copolymer Thermal Stability via Composite Units
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fluorine-containing polymers with perfluoro(1,3-dioxolane) structure exhibit high thermal resistance but are prone to thermal decomposition, necessitating improvement to maintain thermal resistance while reducing decomposition likelihood.
Innovation Solution
A fluorine-containing copolymer is developed, comprising structural units (A), (B), (C), and (D), which are specifically designed to enhance thermal stability and mechanical properties without compromising transparency or thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a fluorine-containing polymer is obtained by polymerization of a monomer having a perfluoro(1,3-dioxolane) structure, then high thermal resistance is achieved, but thermal decomposition becomes more likely
Solution Approach 1:
The patent employs composite materials by creating a copolymer that combines structural unit (A) from perfluoro(1,3-dioxolane) monomer with at least one other structural unit (B), (C), or (D). This composite structure allows the material to inherit high thermal resistance from unit (A) while units (B), (C), or (D) contribute to reduced thermal decomposition, resolving the contradiction between thermal resistance and thermal stability.
Solution Approach 2:
The patent changes the chemical composition parameters by introducing different fluorine-containing structural units into the polymer chain. By adjusting the types and ratios of structural units (A), (B), (C), and (D), the patent optimizes both thermal resistance and thermal decomposition resistance, transforming the material properties to simultaneously achieve both desired characteristics.
2Reliability
If structural units (B), (C), or (D) are added to improve thermal stability, then thermal decomposition resistance increases, but thermal resistance may decrease
Solution Approach 1:
The patent applies local quality by assigning different functional roles to different structural units within the copolymer. Structural unit (A) is positioned to provide high thermal resistance, while structural units (B), (C), or (D) are incorporated to provide thermal decomposition resistance. This localized functional distribution allows both properties to coexist without significant compromise to overall thermal resistance.
Data Source
AI summary
The fluorine-containing copolymer of the present invention includes:a structural unit (A) represented by the following formula (1); andat least one selected from the group consisting of a structural unit (B) represented by the following formula (2), a structural unit (C) represented by the following formula (3), and a structural unit (D) represented by the following formula (4): in the formula (1), Rff1 to Rff4 each independently represent a fluorine atom, a perfluoroalkyl group having 1 to 7 carbon atoms, or a perfluoroalkyl ether group having 1 to 7 carbon atoms, and Rff1 and Rff2 are optionally linked to form a ring; in the formula (2), R1 to R3 each independently represent a fluorine atom or a perfluoroalkyl group having 1 to 7 carbon atoms, R4 represents a perfluoroalkyl group having 1 to 7 carbon atoms, the perfluoroalkyl group optionally has a ring structure, one or some of the fluorine atoms are optionally substituted by a halogen atom other than a fluorine atom, and one or some of fluorine atoms in the perfluoroalkyl group are optionally substituted by a halogen atom other than a fluorine atom; in the formula (3), R5 to R8 each independently represent a fluorine atom or a perfluoroalkyl group having 1 to 7 carbon atoms, the perfluoroalkyl group optionally has a ring structure, one or some of the fluorine atoms are optionally substituted by a halogen atom other than a fluorine atom, and one or some of fluorine atoms in the perfluoroalkyl group are optionally substituted by a halogen atom other than a fluorine atom; and in the formula (4), Z represents an oxygen atom, a single bond, or —OC(R19R20)O—, R9 to R20 each independently represent a fluorine atom, a perfluoroalkyl group having 1 to 5 carbon atoms, or a perfluoroalkoxy group having 1 to 5 carbon atoms, one or some of the fluorine atoms are optionally substituted by a halogen atom other than a fluorine atom, one or some of fluorine atoms in the perfluoroalkyl group are optionally substituted by a halogen atom other than a fluorine atom, one or some of fluorine atoms in the perfluoroalkoxy group are optionally substituted by a halogen atom other than a fluorine atom, s and t are each independently 0 to 5, and s+t represents an integer of 1 to 6 (when Z is —OC(R19R20)O—, s+t is optionally 0).