Near‐Infrared Spectroscopy of Polymers and Rubbers

Workman, Jerry

doi:10.1002/9780470027318.a2021

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…In that case, overtones and combinations, much weaker than the fundamental vibrations, located in the mid- or near-infrared (NIR) range, can be examined. In the NIR region, between 4000 and 12,500 cm −1 , bands are found associated with overtones and combinations of fundamental vibrations of hydrogen-containing groups such as C–H, N–H, and O–H [ 21 , 22 , 23 , 24 ].…”

Section: Definition Of Orientation and Orientation Functionsmentioning

confidence: 99%

Infrared Linear Dichroism for the Analysis of Molecular Orientation in Polymers and in Polymer Composites

Bokobza

2022

Polymers

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The mechanical properties of polymeric materials are strongly affected by molecular orientation occurring under processing conditions. Infrared dichroism is particularly well suited for characterizing polymer chain orientation at a molecular level. The usefulness of this technique has been demonstrated through various applications in homopolymers, semi-crystalline polymers, copolymers, polymer blends, as well as in polymer composites. Determination of molecular orientation can be carried out in the mid- and near-infrared ranges and very small dichroic effects can be detected with the use of a photoelastic modulator. Chain orientation in polymer composites is seen to increase with the filler content in the case of a strong interface between the two phases, making possible a quantification of the degree of bonding between the host polymeric matrix and the incorporated inclusions.

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Section: Definition Of Orientation and Orientation Functionsmentioning

confidence: 99%

Infrared Linear Dichroism for the Analysis of Molecular Orientation in Polymers and in Polymer Composites

Bokobza

2022

Polymers

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“…FT-IR analysis in the near infrared region (NIR) also presents studying gaps. NIR analysis provide good results for polymer analysis (Workman 2006), including EPDM, however it requires the application of algorithms (Tang et al 2018, Miller 1989). This fact endorses further studies in the NIR region for evaluation of binary rubber blends, especially in transflectance mode.…”

Section: Introductionmentioning

confidence: 99%

Infrared quantification of binary rubber blends with overlapping bands

Barros

Murakami

Magalhães

et al. 2023

An. Acad. Bras. Ciênc.

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Quantification of elastomer content for the ethylene-propylene diene monomer/polybutadiene blend are seldom subjects in the literature, mainly due to rubber compatibility problems. However, suitable blend contents can lead to desirable properties. Infrared spectroscopy can quantify this type of blend even if some bands overlap, which can be resolved with the proper choice of spectrum obtaining mode and non-overlapping analytical bands. This study evaluates the ethylene-propylene diene monomer/polybutadiene blend quantification by transmission, reflection and transflectance infrared. Even though all of the methodologies showed satisfactory results, transmission mode provided better accuracy. The methodology is simple and suited for the rubber industry. The sample with the higher BR content provided the best result.The band at 743 cm -1 is weak and results in even weaker absorptions when measuring samples with low BR content. On the other hand, the developed methodologies provided an accurate determination of low EPDM contents. For infrared spectroscopy researchers, these results not only encourage using different spectra obtaining modes application, including less conventional ones such as transflectance in the near infrared region for quantitative determination, it also contributes to a wide discussion of errors in the developed methodologies, which are also seldom discussed in publications.

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