Polyarylene Sulfide Resin End Group Modification for Silane Adhesion

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Polyarylene sulfides, such as polyphenylene sulfide (PPS), have a low concentration of polar end groups, limiting their reactivity with silane compounds, which hampers the adhesion with reinforcing fibers in composite materials.

Innovation Solution

A method involving the reaction of an arylene sulfide polymer with an end group-modifying compound, specifically an organic salt of an aminoalkyl carboxylic acid, to reduce halogen end groups, thereby enhancing the reactivity of the polymer with silane compounds.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If PPS is used as is, then it maintains good heat resistance and chemical resistance, but it has low reactivity with silane compounds due to low concentration of polar end groups

Engineering Contradiction:

Improvereactivity with silane compoundsVSAvoidlow concentration of polar end groups

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the chemical parameters of the PPS polymer by introducing polar end groups through controlled degradation processes (hydrolysis, oxidation, or reaction with carbon dioxide). This transforms the non-polar PPS chains into polar PPS variants with enhanced reactivity toward silane coupling agents, directly resolving the contradiction between maintaining PPS stability and improving its reactivity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces polar end groups as intermediary functional groups that mediate the interaction between PPS and silane compounds. These polar end groups act as reactive sites that facilitate the coupling reaction between the polymer and silane, enabling improved adhesion without fundamentally altering the bulk PPS structure

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If reinforcing fibers are treated with silane sizing composition, then adhesion with PPS should improve, but the low reactivity of PPS limits the overall effectiveness

Engineering Contradiction:

Improveadhesion with reinforcing fibersVSAvoideffectiveness of silane coupling

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

By modifying the end group chemistry of PPS to introduce polar functional groups, the patent changes the surface reactivity parameters of the polymer. This enables the PPS to effectively interact with silane coupling agents treated on reinforcing fibers, thereby realizing the intended adhesion improvement that would otherwise be limited by PPS's inherent low reactivity

Inventive Principle:

Principle #35Parameter changes

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 modified polyarylene sulfide resin exhibits improved affinity and reactivity with silanes, leading to enhanced adhesion and properties in polymer compositions, including improved mechanical and thermal stability.

Implementation Method 1

reacting an arylene sulfide polymer containing halogen end groups with an end group-modifying compound to form the polyarylene sulfide resin

Methodology Applied

Scientific EffectChemical reaction: Chemical Bonding

Data Source

PatentUS20240400763A1Technique for Forming a Polyarylene Sulfide Resin

Publication Date: 2024.12.05 TICONA LLC

AI summary

A method for forming a polyarylene sulfide resin is provided. The method comprises reacting an arylene sulfide polymer containing halogen end groups with an end group-modifying compound to form the polyarylene sulfide resin, wherein the end group-modifying compound includes an organic salt of an aminoalkyl carboxylic acid.