Polyarylene sulfide composition
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Solution Overview
Problem
Polyphenylene sulfide (PPS) materials face challenges in achieving high impact strength without compromising other mechanical properties due to incompatibility with impact modifiers, leading to phase separation and reduced performance.
Innovation Solution
A polymer composition combining polyarylene sulfide with inorganic fibers, an impact modifier, an organosilane compound, and a high molecular weight siloxane polymer, which enhances compatibility and processability, thereby improving mechanical properties and impact strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If impact modifiers are blended with PPS to improve impact strength, then impact strength is improved, but phase separation occurs leading to reduced mechanical performance
Solution Approach 1:
The patent introduces a compatibilizer (organometallic catalyst residue) as an intermediary substance that mediates between the PPS matrix and impact modifiers. This compatibilizer has affinity for both phases, reducing interfacial tension and preventing phase separation, thereby maintaining mechanical performance while achieving improved impact strength.
Solution Approach 2:
The patent modifies the chemical parameters of the PPS composition by controlling the presence of organometallic catalyst residues and adjusting the molecular weight distribution of the PPS. These parameter changes enhance the compatibility between PPS and impact modifiers, preventing phase separation while improving impact strength.
Data Source
AI summary
A polymer composition that comprises a polyarylene sulfide, inorganic fibers, an impact modifier, an organosilane compound, and a high molecular weight siloxane polymer is provided.