Quantitative ATR FT-IR Analysis of Surface Segregation of Polymer Blends of Polystyrene/Poly(Dimethylsiloxane)-co-polystyrene

Chen, Jiaxing; Gardella, Joseph A.

doi:10.1366/0003702981943824

Cited by 23 publications

(16 citation statements)

References 21 publications

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“…Attenuated total reflection (ATR) infrared (IR) spectroscopy is known as one of powerful surface characterization techniques that can provide information, e.g. chemical reactions, functional groups, and molecular orientation, at the surface and interface regions of polymers [6][7][8][9][10][11]. Quantitative information of a sample can also be obtained from a system with an optical contact between the sample and an internal reflection element (IRE) [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Surface melting and crystallization behavior of polyhydroxyalkanoates studied by attenuated total reflection infrared spectroscopy

Padermshoke

Katsumoto

Sato

et al. 2004

Polymer

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Section: Introductionmentioning

confidence: 99%

Surface melting and crystallization behavior of polyhydroxyalkanoates studied by attenuated total reflection infrared spectroscopy

Padermshoke

Katsumoto

Sato

et al. 2004

Polymer

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“…The concept of multiple internal reflection spectroscopy has been successfully employed by researchers to analyze various species in different environments. [8][9][10][11][12] As illustrated in Fig. 1, each total reflection can set up a surface-confined standing-wave pattern (evanescent wave) which can effectively activate the IR vibration modes near to the ATR surface.…”

Section: Introductionmentioning

confidence: 99%

Detection of Ni2+ by a Dimethylglyoxime Probe Using Attenuated Total-Reflection Infrared Spectroscopy

Ponnuswamy

Chyan

2002

ANAL. SCI.

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The detection of metal contaminants such as Ni, Cr, As, Cd, Hg etc. in the environment continues to receive much research attention due to their adverse effects on the human and aquatic species. 1 The impact of nickel and its compounds on aquatic species and to humans has been systematically studied. 2 According to EPA regulations, the recommended water quality criteria for nickel is set below 0.6 ppm for human consumption. It was found that [Ni 2+ ] >1 ppm levels in the aquatic environment proved to be lethal to several aquatic species. The number of techniques employed for the detection of nickel is fairly large. Some of the common laboratory techniques employ gravimetry, atomic absorption spectroscopy, mass spectrometry, 3,4 spectrophotometry, 5 electroanalytical techniques, 6,7 chemical spot testing, colorimetric analysis and ion exchange.3 In this paper, we report on a new approach for the detection of Ni 2+ by multiple internal reflection infrared spectroscopy (MIRIS) using a silicon ATR optical element modified with a uniform coating of DMG probe molecules embedded in a Nafion matrix. The concept of multiple internal reflection spectroscopy has been successfully employed by researchers to analyze various species in different environments. [8][9][10][11][12] As illustrated in Fig. 1, each total reflection can set up a surface-confined standing-wave pattern (evanescent wave) which can effectively activate the IR vibration modes near to the ATR surface. Up to 90 internal reflections within an ATR silicon crystal were employed in this study to enhance the detection sensitivity. A unique C=N infrared stretching peak (at 1572 cm -1 ) from Ni(DMG)2 affords the identification and quantification of Ni 2+. Nafion not only holds the DMG probe molecule near the silicon ATR surface, but also functions as a cation exchange channel to promote the complexation of Ni 2+ with DMG. In addition, the Nafion matrix was shown to effectively block the organic residues in the environmental sample from fouling up the silicon ATR sensor. To the best of our knowledge, the present study constitutes the first quantitative analysis of nickel using the ATR technique with a DMG/Nafion probe. Experimental Reagents and materialsReagent-grade dimethylglyoxime (MCB Chemicals) and nickelous sulfate (Fischer Scientific) were used. A 5 wt% solution of Nafion perfluorinated ion-exchange resin in a mixture of lower aliphatic alcohols and water was obtained from Aldrich Chemicals. Reagent-grade methanol, ethanol, ammonium hydroxide and hydrogen peroxide were used. Ultrapure water from a Millipore Milli-Q system (18.2 MΩ cm) was utilized for all dilutions. A new analytical approach for the detection of Ni 2+ utilizing an attenuated total reflection (ATR) technique is discussed in this paper. Nickel detection was accomplished on a silicon ATR parallelogram crystal uniformly coated by a ca. 1.5-µm Nafion film embedded with dimethylglyoxime (DMG) probe molecules. The detection of Ni 2+ is based on the appearance of a unique infrared absorptio...

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“…While ATR-FTIR spectra can exhibit shifts in peak position and/or distortion of absorption band shapes when compared with transmission measurements, particularly in the case of strong absorbances where dispersion effects can be significant [11], the use of ratios of integrated absorption bands has been shown to be an appropriate strategy for making quantitative comparisons [15,22]. The integrated band intensity is obtained from an assigned analyte transition with the lower and upper limits of the absorption band, in units of cm -1 , designated as lower and upper.…”

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confidence: 99%

ATR-FTIR spectroscopic analysis of sorption of aqueous analytes into polymer coatings used with guided SH-SAW sensors

Jones

Johnson

et al. 2005

IEEE Sensors J.

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Attenuated total internal reflectance Fourier transform infrared (ATR-FTIR) spectroscopy was used for the investigation of sorption of aqueous solutions of analytes into polymer coatings. A series of simple model polymers: poly(dimethylsiloxane) (PDMS), poly(epichlorhydrin) (PECH), and poly(isobutylene) (PIB) films and analytes: aqueous solutions of ethylbenzene, xylenes, toluene, and nitrobenzene were used to evaluate the use of ATR-FTIR spectroscopy as a screening tool for sensor development. The ratios of integrated infrared absorption bands provided a simple and efficient method for predicting trends in partition coefficients. Responses of polymer-coated guided shear horizontal surface acoustic wave (SH-SAW) sensor platforms to the series of analytes, using polymer coatings with similar viscoelastic properties, were consistent with ATR-FTIR predictions. Guided SH-SAW sensor responses were linear in all cases with respect to analyte concentration in the tested range. Comparison of ATR-FTIR data with guided SH-SAW sensor data identifies cases where mass loading is not the dominant contribution to the response of the acoustic wave sensor. ATR-FTIR spectra of nitrobenzene, coupled with computational chemistry, provided additional insight into analyte/polymer interactions.

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Quantitative ATR FT-IR Analysis of Surface Segregation of Polymer Blends of Polystyrene/Poly(Dimethylsiloxane)-co-polystyrene

Cited by 23 publications

References 21 publications

Surface melting and crystallization behavior of polyhydroxyalkanoates studied by attenuated total reflection infrared spectroscopy

Surface melting and crystallization behavior of polyhydroxyalkanoates studied by attenuated total reflection infrared spectroscopy

Detection of Ni2+ by a Dimethylglyoxime Probe Using Attenuated Total-Reflection Infrared Spectroscopy

ATR-FTIR spectroscopic analysis of sorption of aqueous analytes into polymer coatings used with guided SH-SAW sensors

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