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Epoxy resin cure. II. FTIR analysis (1984)

Smith, Robert E. ; Larsen, Fred N. ; Long, Charles L.

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Polymer Science 29 (1984), S. 3713-3726

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ISSN: 0021-8995

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Fourier transform infrared (FTIR) spectroscopy is used to determine the cure rate of an epoxy resin consisting of Tetraglycidyl-4,4′-diaminodiphenyl methane (TGDDM) and diaminodiphenylsulfone (DDS). Cure rates at 120 and 160°C are shown to increase noticeably when 1% BF3-MEA is added to either TGDDM to TGDDM plus DDS. Fluoroboric acid is shown to increase the cure rates even more than the BF3-MEA. These Results combined with the NMR results in the accompanying article indicate that BF3-MEA is not a catalyst for epoxy resin cure. Instead it is rapidly hydrolyzed to fluoroboric acid which acts as the catalyst.

Zusätzliches Material: 9 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/app.1984.070291207

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Digitale Medien

Epoxy resin cure. I. Fluorine-19 NMR of boron trifluoride monoethylamine and fluoroboric acid (1984)

Smith, Robert E. ; Larsen, Fred N. ; Long, Charles L.

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Polymer Science 29 (1984), S. 3697-3711

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Details

ISSN: 0021-8995

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Fluorine-19 NMR is used to examine the role of boron trifluoride monoethylamine (BF3-MEA) in epoxy resin cure. Spectra were first recorded in a variety of solvents suitable for dissolving different epoxy resins. All spectra contained a peak due to fluoroboric acid. Spectra of BF3-MEA in orthodichlorobenzene were then recorded at elevated temperatures. The floroboric acid peak area increased, indicating that the BF3-MEA was being hydrolyzed. Results indicate that, at temperatures above 100°C, BF3-MEA is completely hydrolyzed within 5 min to fluoroboric acid.

Zusätzliches Material: 8 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/app.1984.070291206

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