The polymerization mechanism and kinetics of DGEBA with BF3‐MEA

Michael Tackie; George C. Martin

doi:10.1002/app.1993.070480505

The polymerization mechanism and kinetics of DGEBA with BF₃‐MEA

Michael Tackie, George C. Martin

Department of Biomedical & Chemical Engineering

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

The diglycidyl ether of bisphenol‐A (DGEBA) and boron trifluoride monoethylamine (BF₃‐MEA) were used in a model system to investigate the chemical and physical changes that occur during polymerization. Experiments using ¹⁹F and ¹H nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FTIR) showed that BF₃‐MEA breaks down rapidly into HBF₄ and an amine salt at 85°C and above. The HBF₄ complexes with the epoxy groups, producing an activated monomer that reacts with epoxy in an etherification reaction. A mechanism is proposed whereby activated epoxy sites (complexes) continuously add epoxy throughout the reaction, but where unactivated epoxies (monomer molecules) are unable to react with each other. The reaction rate and mode (kinetic vs. diffusion control) therefore are strongly influenced by the BF₃‐MEA concentration and the reaction temperature. © 1993 John Wiley & Sons, Inc.

Original language	English (US)
Pages (from-to)	793-808
Number of pages	16
Journal	Journal of Applied Polymer Science
Volume	48
Issue number	5
DOIs	https://doi.org/10.1002/app.1993.070480505
State	Published - May 5 1993

ASJC Scopus subject areas

General Chemistry
Surfaces, Coatings and Films
Polymers and Plastics
Materials Chemistry

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The polymerization mechanism and kinetics of DGEBA with BF₃‐MEA

Abstract

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