Thermoset In-Mold Electronics via Vacuum-Formed Elastomeric Gel
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Solution Overview
Problem
Current IME technologies rely on thermoplastics for structural electronics, which lack robustness in extreme environments and require energy-intensive, costly manufacturing processes, while thermosets offer desirable properties but are challenging to process.
Innovation Solution
A method using metathesis-active olefinic monomers and latent metathesis catalysts to create a moldable thermoset substrate via vacuum forming and frontal ring-opening metathesis polymerization, enabling rapid, energy-efficient production of thermoset parts with improved properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thermosets are used to provide strength, thermal stability, and creep resistance, then material properties are improved, but processing difficulty and manufacturing cost increase
Solution Approach 1:
The patent changes the physical state parameter of the thermoset material from solid (traditional) to liquid (emulsion form), enabling it to flow and conform to molds during manufacturing. This liquid state allows easy processing through vacuum forming and injection molding, while the material subsequently cures to achieve the desired solid thermoset properties of strength and thermal stability.
Solution Approach 2:
The patent introduces water as an intermediary medium by formulating the thermoset polymer as an emulsion. This water-based emulsion acts as a carrier that enables the thermoset resin to be processed like a liquid, facilitating moldability and conformability, while the polymer particles remain suspended and can be cured after molding to achieve final structural properties.
2Stability of the object's composition
If traditional thermoset manufacturing processes are used, then material stability is improved, but energy consumption and environmental impact increase
Solution Approach 1:
The patent changes the processing temperature parameter by enabling the thermoset to be molded in its liquid emulsion state at or near room temperature, eliminating the need for high-temperature ovens and autoclaves. The material is formed while liquid, then cured after molding, dramatically reducing the energy required for the manufacturing process while maintaining thermal stability in the final product.
Solution Approach 2:
The patent replaces thermal processing (heating to melt and form) with a mechanical/conformational approach where the liquid emulsion is molded at ambient conditions. Instead of using heat to make the material pliable, the material is already pliable in liquid form, substituting thermal energy input with a different state-of-matter approach that reduces energy consumption.
3Ease of manufacture
If thermoplastics are used for ease of manufacturing and thermal processability, then manufacturing simplicity is improved, but environmental stability and high-temperature performance deteriorate
Solution Approach 1:
The patent creates a composite approach by combining the manufacturing advantages of thermoplastics (liquid state processability) with the performance advantages of thermosets (crosslinked stability). The water-based emulsion allows thermoplastic-like processing simplicity, while the underlying thermoset polymer chemistry provides thermoset-level environmental stability and high-temperature performance in the cured state.
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 method produces thermoset parts with enhanced mechanical and thermal stability, suitable for extreme environments, and reduces manufacturing costs and energy consumption, facilitating the integration of electronic components into 3D structures.
Implementation Method 1
transitioning the monomer to an elastomeric gel via a ring-opening metathesis polymerization reaction; curing the molded gel via a frontal ring-opening metathesis polymerization reaction
Implementation Method 2
vacuum forming the elastomeric gel to a mold
Data Source
AI summary
In-mold electronics is an innovative approach to the manufacture of 3D circuitry and electronic components. In-mold electronics relies on vacuum forming processes, which are historically to thermoplastics. The present invention is directed to method of vacuum forming using thermoset polymers. Specifically, an ambient polymerization is used to transition a liquid monomeric solution to an elastomeric gel. This free-standing gel can then be vacuum formed to a mold, and the reaction can be completed via a frontal polymerization of the molded gel. Thermoset materials produced with this method have properties that provide benefits over traditionally employed thermoplastic substrates and enable 3D device integration into environmentally demanding architectural, automotive and extraterrestrial structures.