Fluorene Derivative Polyamide Resin Melt Fluidity
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Solution Overview
Problem
Polyamide-series resin compositions lack effective additives to enhance melt fluidity while maintaining mechanical strength, and existing methods do not describe or suggest the use of fluorene derivatives for this purpose.
Innovation Solution
Incorporating a fluorene derivative with a specific chemical structure into a polyamide-series resin composition to improve its melt fluidity, along with a fibrous reinforcing material, which balances mechanical strength and fluidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a polyamide-series resin is used to ensure mechanical strength, then strength is improved, but melt fluidity deteriorates
Solution Approach 1:
The patent changes the chemical structure parameters of the polyamide resin by introducing specific fluorene derivative components with controlled substitution patterns (R1, R2a-R2d, R3a-R3b groups) and ratios (5-50 mass%). This modifies the molecular weight, polarity, and intermolecular forces of the resin system, thereby adjusting the melt viscosity and fluidity while preserving the crystalline structure and mechanical strength properties of the polyamide backbone.
Solution Approach 2:
The patent creates a composite resin system by combining polyamide-series resin with fluorene derivative compounds containing carbamoyl groups. This composite formulation leverages the high strength and crystallinity of polyamide while the fluorene derivative component acts as a fluidity modifier, reducing melt viscosity through its specific molecular structure and interactions with the polyamide chains.
2Strength
If fibrous reinforcing material is added to improve mechanical strength, then strength is improved, but melt fluidity deteriorates
Solution Approach 1:
The patent modifies the resin matrix parameters by incorporating fluorene derivatives that specifically interact with fibrous reinforcing materials. The carbamoyl groups in the fluorene derivative form hydrogen bonds or intermolecular interactions with fiber surfaces, improving interfacial adhesion and allowing higher fiber loadings without excessive viscosity increase, thus maintaining both strength enhancement and acceptable fluidity.
Data Source
AI summary
The resin composition of the present disclosure contains a fluorene derivative represented by the following formula (1) and a polyamide-series resin:Wherein R1 represents a substituent, k denotes an integer of 0 to 8, R2a, R2b, R2c, and R2d each represent a hydrogen atom or a substituent, R3a and R3b each represent a hydrogen atom or a substituent, and X1a and X1b each represent a group defined in the following formula (X1):wherein R4 and R5 each represent a hydrogen atom or a hydrocarbon group; or R4 and R5 bend together to form a heterocyclic ring containing the nitrogen atom adjacent to R4 and R5.The resin composition has an excellent fluidity.