Polymer Resin Composition for Automotive Front Bumper
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Solution Overview
Problem
Polypropylene resin has limited tensile strength and flexural strength, which restricts its use in applications requiring toughness and stiffness, such as automotive parts, and the addition of glass or carbon fibers often results in fiber breakage and scattering, reducing mechanical properties.
Innovation Solution
A polymer resin composition comprising a binder resin of olefin-based polymer, surface-treated carbon fibers, and a modified polyolefin resin grafted with polyetheramine-bonded dicarboxylic acid or acid anhydride, enhancing compatibility and reducing fiber scattering, thereby improving mechanical properties like flexural elastic modulus, tensile strength, and impact strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If glass fiber is added to polypropylene resin to improve mechanical properties, then tensile strength and flexural strength are improved, but the glass fiber breaks and scatters, reducing mechanical physical properties
Solution Approach 1:
The patent uses a coupling agent as an intermediary substance between the glass fiber and polypropylene resin. The coupling agent chemically bonds to both the glass fiber surface and the polymer matrix, creating a bridge that prevents fiber-matrix separation and reduces fiber scattering, thereby maintaining improved mechanical properties
Solution Approach 2:
The patent modifies the surface parameters of the glass fiber through treatment with coupling agents, changing the chemical and physical properties of the fiber surface to improve compatibility with the polypropylene resin matrix, thereby reducing fiber breakage and scattering
2Strength
If carbon fiber is added to polypropylene resin to improve strength, then rigid reinforcement is achieved, but reactivity between carbon fiber and nonpolar polypropylene is insufficient, limiting strength reflection
Solution Approach 1:
The patent introduces a coupling agent as a mediator between the carbon fiber and polypropylene resin. This coupling agent has functional groups that interact with both the carbon fiber surface and the polypropylene matrix, enabling effective stress transfer and allowing the carbon fiber's strength to be fully reflected in the composite material
Solution Approach 2:
The patent changes the surface chemical parameters of the carbon fiber through coupling agent treatment, transforming the nonpolar carbon fiber surface into a state with improved reactivity and compatibility with the polypropylene matrix, thereby achieving substantial reactivity and strength reflection
3Strength
If rigid reinforcements are added to polypropylene resin to improve tensile and flexural strength, then mechanical physical properties are enhanced, but the resin scattering increases, reducing overall performance
Solution Approach 1:
The coupling agent serves as an intermediary that reduces resin scattering by improving the interfacial adhesion between the rigid reinforcements and the polypropylene matrix, preventing resin separation and maintaining compositional stability
Solution Approach 2:
The patent creates a tri-component composite system consisting of polypropylene resin, rigid reinforcements (glass or carbon fiber), and coupling agent. This composite structure leverages the synergistic effects of all three components to achieve improved mechanical properties while minimizing resin scattering
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 solution significantly enhances the mechanical properties of the polymer resin composite, reducing fiber scattering and improving compatibility, leading to improved tensile strength, flexural strength, and impact resistance, making it suitable for high-speed crash applications in vehicle parts like front bumpers.
Implementation Method 1
a modified polyolefin resin that is grafted with polyetheramine-bonded dicarboxylic acid or an acid anhydride thereof
Implementation Method 2
a carbon fiber that is surface-treated with one or more compounds selected from the group consisting of an epoxy compound, a phenol compound, polyester and vinyl ester
Implementation Method 3
improving compatibility and reducing fiber scattering, thereby improving mechanical properties like flexural elastic modulus, tensile strength, and impact strength
Data Source
AI summary
Disclosed are a polymer resin composition comprising: a binder resin including an olefin-based polymer resin; a carbon fiber surface-treated with a predetermined compound; and a modified polyolefin resin grafted with polyetheramine-bonded dicarboxylic acid or an acid anhydride thereof, a polymer composite tape including the polymer resin composition, and a front bumper of a vehicle equipped with the polymer composite tape.