Aryl Compound Crosslinked Polymer Heat Resistance
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Solution Overview
Problem
Existing aryl compounds with glycidyl and (meth)allyl groups exhibit poor heat resistance and bond strength due to low molecular weight linking hydrocarbons, leading to inadequate performance in polymer formation and CVD film resistance.
Innovation Solution
An aryl compound with at least three glycidyl and three (meth)allyl groups is synthesized by reacting an aryl compound with (meth)allyl-containing phenol groups and 2-halomethyloxirane, resulting in a polymer with a three-dimensional crosslinked structure, enhancing heat, weather, and water resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a compound with two epoxy groups is used to form linear polymer, then polymerization is achieved, but heat resistance is poor and bond strength is lost at high temperature
Solution Approach 1:
The patent transitions from linear polymer structure (one-dimensional) to three-dimensional crosslinked network structure. The compound contains both epoxy groups and allyl groups that enable crosslinking through different mechanisms, creating a spatial network that maintains structural integrity at high temperatures, thereby resolving the heat resistance problem while preserving bond strength.
Solution Approach 2:
The patent creates a composite polymer system by combining epoxy resin with the novel aryl compound containing both epoxy and allyl groups. This composite approach allows the epoxy groups to provide crosslinking for heat resistance while the allyl groups form additional crosslinks, resulting in a material that simultaneously achieves both strength and heat resistance.
2Ease of manufacture
If low molecular weight hydrocarbon linking groups are used, then compound synthesis is simplified, but heat resistance and CVD film resistance are poor
Solution Approach 1:
The patent modifies the molecular weight parameter of the linking hydrocarbon groups, increasing them from low molecular weight (e.g., methyl) to high molecular weight (C3-C20). This parameter change maintains synthetic feasibility while dramatically improving heat resistance and CVD film resistance properties of the resulting polymer.
3Temperature
If aryl compound with high molecular weight linking groups is used, then heat resistance is improved, but polymerization reactivity may be reduced
Solution Approach 1:
The patent designs the aryl compound to possess multiple functional groups (epoxy groups and allyl groups) that can participate in different polymerization mechanisms. This multi-functionality ensures that even with high molecular weight linking groups, the compound maintains high polymerization reactivity through alternative reaction pathways, resolving the contradiction between heat resistance and reactivity.
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 resulting polymer demonstrates improved strength, heat resistance, and water resistance, making it suitable for heat-resistant resin materials.
Implementation Method 1
The aryl compound having at least three glycidyl groups and at least three (meth)allyl groups in the molecule is polymerizable in two ways using (meth)allyl groups and oxirane rings. Since the aryl compound has at least three functional groups of each type in the molecule, the resulting polymer has a three-dimensional crosslinked structure.
Implementation Method 2
Since the aryl compound has at least three functional groups of each type in the molecule, the resulting polymer has a three-dimensional crosslinked structure. A polymer as polymerized using such functional groups is further crosslinkable and curable.
Data Source
AI summary
An aryl compound terminated with at least three glycidyl groups and at least three (meth)allyl groups, having formula (1) wherein R1 is a C3-C20 hydrocarbon, R2 is hydrogen or methyl, and n is 3 or 4 is novel. It is prepared by reacting an aryl compound having at least three (meth)allyl-containing phenol groups with a 2-halomethyloxirane.