Side-Chain Functionalized PAES Copolymer for Epoxy Toughening
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 as toughening agents in enhancing impact properties and toughness of composite materials.
Innovation Solution
A side-chain functionalized PAES copolymer with reactive end-groups is developed, allowing for improved solubility and interfacial properties by introducing both side-chain functionality and end-groups through a specific polymerization process, enabling higher incorporation levels in epoxy resins and improved mechanical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If PAES polymers are used as toughening agents in epoxy composite matrices, then impact properties and toughness are enhanced, but solubility in the epoxy composite matrix deteriorates, limiting incorporation
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of PAES polymers through side-chain functionalization with allyl/vinylene groups and introducing reactive end-groups. These structural parameter changes enable the polymer to maintain high toughness performance while achieving improved solubility in epoxy composite matrices, allowing incorporation levels of 5-50 wt%
Solution Approach 2:
The patent creates a composite system by combining PAES polymers with epoxy resins, where the functionalized PAES acts as a dispersed phase within the epoxy matrix. The side-chain functional groups and reactive end-groups facilitate interfacial interaction between the polymer and epoxy, enabling effective stress transfer and toughness enhancement at optimized incorporation levels
2Ease of manufacture
If PAES with reactive end-groups are used to improve solubility and interfacial properties, then solubility and reactivity with epoxy resin improve, but the amount that can be added is limited, reducing beneficial effect
Solution Approach 1:
The patent introduces allyl/vinylene side-chains with specific molecular structures that provide both solubility enhancement and reactive functionality. The side-chain length, composition, and density are optimized to achieve maximum solubility and reactivity while maintaining the ability to incorporate 5-50 wt% polymer into the epoxy 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 functionalized PAES copolymer significantly enhances the mechanical properties, such as impact resistance and toughness, of composite materials by increasing solubility and bonding between polymer components and inorganic fillers, leading to improved material performance.
Implementation Method 1
PAES featuring reactive end-groups, which possess a lighter solubility than PAES as such, have been used to improve interfacial properties in epoxy resins
Implementation Method 2
The toughness or the impact properties of the composite can be enhanced by increasing the amount of PAES in the matrix
Implementation Method 3
the side-chain functionalized PAES copolymer (P1)... enabling higher incorporation levels in epoxy resins and improved mechanical performance
Data Source
AI summary
The invention pertains to a side-chain functionalized copolymer (P1) comprising reactive end-groups. The present invention also pertains to the preparation process of copolymer (P1) starting from copolymer (P0), as well as 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.