Publication: Transiciones térmicas en recubrimientos polisiloxánicos de fibras de vidrio
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2000
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Elsevier
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Abstract
Se realizó una estimación de las temperaturas de relajación de recubrimientos poliméricos en fibras de vidrio. Para ello, se llevó a cabo el seguimiento de la respuesta fluorescente, en función de la temperatura, de dos fluoróforos químicamente enlazados al recubrimiento polimérico. Las fibras de vidrio fueron tratadas con una disolución acuosa de 3-aminopropiltrietoxisilano(APES), y una mezcla al 50 % de APES y de 3-aminopropilmetildietoxisilano (APDES). Los marcadores fluorescentes, cloruro de pireno-1-sulfonilo (PSC) y cloruro de 1-dimetilamino-5-naftalenosulfonilo (DNS), se anclaron a las fibras de vidrio silanizadas a través de la formación de un compuesto sulfonamida estable y fluorescente (PSA y DNSA respectivamente).Se realizaron sus espectros de emisión en función de la temperatura en el intervalo (133, 413)K. Los resultados mostraron transiciones térmicas a bajas temperaturas para las muestras estudiadas indicando la alta flexibilidad de la región de acoplamiento. Además, dicha temperatura de transición depende de forma clara de la estructura del polímero que recubre a las fibras.
It was estimated the relaxation temperatures of polymeric coatings on glass fibers. In order to do this, it was carried out the fluorescent response study, as a function of temperature, of two dyes chemically bonded to the polymeric coating. The glass fibers were treated with aqueous solutions of 3-aminopropyltriethoxisilane (APES) and a 50 % mixture of APES and 3-aminopropylmethyldiethoxisilane (APDES). The fluorescent labels, pyrene-1-sulfonyl chloride (PSC) and 1-dimethylamino-5- naphtalenesulfonyl chloride (DNS), were attached to the silanized glass fibers by the formation of a stable and highly fluorescent sulfonamide conjugate (PSA and DNSA respectively). Emission spectra were recorded as a function of temperature in the range (133, 413)K. The results shown thermal transitions at low temperatures, which reflect the high flexibility of the coupling region. In addition, that transition temperature clearly depends on the structure of the polymeric coating of the glass fibers.
It was estimated the relaxation temperatures of polymeric coatings on glass fibers. In order to do this, it was carried out the fluorescent response study, as a function of temperature, of two dyes chemically bonded to the polymeric coating. The glass fibers were treated with aqueous solutions of 3-aminopropyltriethoxisilane (APES) and a 50 % mixture of APES and 3-aminopropylmethyldiethoxisilane (APDES). The fluorescent labels, pyrene-1-sulfonyl chloride (PSC) and 1-dimethylamino-5- naphtalenesulfonyl chloride (DNS), were attached to the silanized glass fibers by the formation of a stable and highly fluorescent sulfonamide conjugate (PSA and DNSA respectively). Emission spectra were recorded as a function of temperature in the range (133, 413)K. The results shown thermal transitions at low temperatures, which reflect the high flexibility of the coupling region. In addition, that transition temperature clearly depends on the structure of the polymeric coating of the glass fibers.
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Fibras de vidrio, 3-aminopropiltrietoxisilano, Región de acoplamiento, Marcadores fluorescentes, Glass fibers, 3-aminopropyltriethoxisilane, Coupling region, Fluorescent labels
Bibliographic citation
González-Benito, J., Aznar, A.J., Maçanita, A., Baselga, J. (2000). Transiciones térmicas en recubrimientos polisiloxánicos de fibras de vidrio. Boletín de la Sociedad Española de Cerámica y Vidrio, 39(3), pp. 396-400