Epoxy-Functionalized PAES Copolymers for Tougher Epoxy Composites
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Poly(aryl ether sulfones) (PAES) polymers have poor solubility in epoxy composite matrices, limiting their incorporation and effectiveness in enhancing the toughness and impact properties of composite materials.
Innovation Solution
Incorporation of a side-chain epoxy-functionalized PAES copolymer (P1) into the epoxy matrix, which is prepared by introducing epoxy groups via partial epoxidation of a copolymer (P0) containing allyl side-chains, allowing for increased solubility and improved interfacial bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If PAES polymers are incorporated into epoxy composite matrix to enhance toughness and impact properties, then the mechanical properties of composite materials are improved, but the solubility of PAES in epoxy matrix is poor, limiting their incorporation
Solution Approach 1:
The patent modifies the chemical structure of PAES polymers by introducing reactive end groups (epoxy, carboxyl, or hydroxyl groups) to change the solubility parameters and reactivity characteristics. This allows PAES to be incorporated into epoxy matrix at higher concentrations while maintaining solubility and improving interfacial adhesion, thereby resolving the contradiction between enhancing mechanical properties and achieving adequate solubility
Solution Approach 2:
The invention creates a composite system where modified PAES polymers with reactive end groups are combined with epoxy resin. The reactive end groups enable chemical bonding between PAES and epoxy matrix, forming an integrated composite material that achieves both high PAES content for toughness enhancement and good solubility through chemical compatibility
2Quantity of substance
If reactive end groups are introduced to PAES to improve solubility and interfacial properties, then solubility and reactivity with epoxy composite are improved, but the amount of PAES that can be added is still limited
Solution Approach 1:
The patent systematically varies the type (epoxy, carboxyl, hydroxyl) and concentration of reactive end groups on PAES polymers to optimize the balance between solubility in epoxy matrix and maximum achievable PAES content. By controlling these chemical parameters, the invention achieves both high solubility/reactivity and high PAES loading in the composite matrix
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 side-chain epoxy-functionalized PAES copolymer (P1) enhances the mechanical properties of composite materials, including impact resistance and toughness, by increasing the amount of PAES in the epoxy matrix and improving interactions with fibers.
Implementation Method 1
The copolymer (P1) is obtained by partial epoxidation of a copolymer (P0) containing allyl side-chains
Data Source
AI summary
The invention pertains to a side-chain epoxy-functionalized copolymer (P1) and to the process for preparing this copolymer (P1). The present invention also pertains to the use of the copolymer (P1) in the preparation of a membrane, a composite material or a coating. The present invention also relates to a resin composition comprising at least the copolymer (P1) according to the present invention.