Polyphenylene Sulfide Resin Composition for Automotive Intake Ducts
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Solution Overview
Problem
Conventional resin compositions for automotive parts, such as intake ducts, face challenges with flexibility, toughness, heat aging resistance, and chemical resistance, particularly in high-temperature and acidic environments, due to the limited blending amounts of elastomers which compromise mechanical properties.
Innovation Solution
A polyphenylene sulfide resin composition incorporating an amino group-containing compound and an epoxy group-containing elastomer, where the polyphenylene sulfide resin forms a continuous phase, and the amino and epoxy group-containing compounds form a dispersed phase, with a specific modulus of elongation range and blending ratios to achieve enhanced flexibility and heat aging resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the blending amount of elastomer is increased to improve flexibility, then flexibility is improved, but heat resistance and chemical resistance are sacrificed
Solution Approach 1:
The patent changes the chemical structure parameters of the elastomer by introducing polar groups (carboxyl, hydroxyl, or amine groups) to create an elastomer with enhanced polarity. This parameter change allows the elastomer to maintain flexibility while improving compatibility with PPS and resistance to heat and chemicals, resolving the contradiction between flexibility and durability
Solution Approach 2:
The patent creates a composite material system consisting of PPS resin and polar group-containing elastomer in specific blending ratios (30-70 wt% elastomer). This composite structure achieves synergistic effects where the PPS provides structural integrity and the modified elastomer provides flexibility while both components contribute to heat and chemical resistance through their compatible interfaces
2Strength
If the blending amount of elastomer is increased to improve toughness, then toughness is improved, but mechanical properties after heat treatment deteriorate
Solution Approach 1:
The patent modifies the elastomer's chemical parameters by incorporating polar groups that provide thermal stability. This allows the elastomer phase to maintain its toughening effect even after high-temperature heat treatment, preventing the deterioration of mechanical properties while preserving toughness enhancement
3Ease of manufacture
If conventional resin ducts are used in high-temperature and acidic environments, then manufacturing is simple, but durability decreases causing cracks and ruptures
Solution Approach 1:
The patent develops a composite resin composition of PPS and polar group-containing elastomer that maintains manufacturability through conventional processing while achieving superior durability. The composite structure provides resistance to thermal degradation and chemical corrosion in acidic environments, preventing cracks and ruptures that occur with conventional resins
Solution Approach 2:
The patent changes the chemical resistance parameters of the resin system by introducing polar groups in the elastomer that enhance compatibility with PPS and provide resistance to acid corrosion. This parameter modification allows the duct material to withstand high-temperature acidic environments without degradation, maintaining durability while remaining manufacturable
Data Source
AI summary
A polyphenylene sulfide resin composition includes a polyphenylene sulfide resin (A), an amino group-containing compound (B), an epoxy group-containing elastomer (C), wherein the polyphenylene sulfide resin (A) forms a continuous phase and the amino group-containing compound (B) and the epoxy group-containing elastomer (C) form a dispersed phase in the morphology of a forming product composed of the resin composition observed with a transmission electron microscope, and the modulus of elongation (the elastic modulus determined by performing a tensile test on an ASTM type 1 dumbbell test piece obtained by injection molding at a cylinder temperature of 300° C. and at a mold temperature of 150° C., under the conditions in which the distance between chucks is 114 mm, the test piece distance is 100 mm, and the elongation rate is 10 mm/min) of the resin composition is 1.0 MPa or more and 1000 MPa or less.