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Flame-Retardant Cycloaliphatic Epoxy Systems with High Dielectric Performance for Electronic Packaging Materials
Xiao-Wei Jia1, Wen-Long Mu1, Zhu-Bao Shao1
1Institute of Functional Textiles and Advanced Materials, National Engineering Research Center for Advanced Fire-Safety Materials D & A (Shandong), College of Textiles & Clothing, Qingdao University, Qingdao 266071, China.
International Journal of Molecular Sciences
|February 11, 2023
Summary
New flame-retardant cycloaliphatic epoxy resins were developed using phosphorus- and nitrogen-rich BCEP-TGIC systems. These materials exhibit enhanced flame retardancy, thermal stability, and dielectric properties, suitable for electronic packaging.
Area of Science:
- Materials Science
- Polymer Chemistry
- Flame Retardancy
Background:
- Cycloaliphatic epoxy systems are crucial for electronic applications but require improved flame retardancy.
- Existing flame-retardant research has yielded slow progress.
- Novel approaches are needed to enhance performance and safety.
Purpose of the Study:
- To synthesize and characterize novel phosphorus- and nitrogen-containing cycloaliphatic epoxy systems.
- To evaluate the curing behavior, flame retardancy, thermal stability, and dielectric properties of the new resins.
- To investigate the chemical degradation of the developed epoxy systems.
Main Methods:
- Synthesis of a phosphorus-containing difunctional cycloaliphatic epoxide (BCEP).
- Formulation of BCEP-Triglycidyl isocyanurate (TGIC) epoxy systems cured with 4-methylhexahydrobenzene anhydride (MeHHPA).
- Evaluation using limiting oxygen index, cone calorimetry, thermogravimetric analysis, dielectric spectroscopy, and chemical degradation tests.
Main Results:
- BCEP-TGIC systems demonstrated efficient curing with high curing activity.
- The BCEP1-TGIC3 formulation achieved a limiting oxygen index of 25.2% and improved flame retardancy compared to commercial resins.
- Enhanced thermal stability, superior dielectric performance (1 Hz to 1 MHz), and mild chemical degradation were observed.
Conclusions:
- The developed BCEP-TGIC epoxy systems offer a promising route to high-performance flame-retardant materials.
- These resins exhibit a favorable balance of properties including flame retardancy, thermal stability, and dielectric performance.
- Potential applications include advanced electronic packaging materials in the electrical and electronic industries.
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