Determination of Polychloroprene Content in Rubber Blend Containing Ethylene Propylene Diene Monomer by Infrared Techniques

Rigoli, Paulo Santos; Barros, Alexandra Helena de; Magalhães, Rachel Farias; Murakami, Lídia Mattos Silva; Carrara, Alexandre Estevão; Dutra, Jorge Carlos Narciso; Mattos, Elizabeth da Costa; Dutra, Rita de Cássia Lazzarini

doi:10.1590/jatm.v13.1197

Cited by 2 publications

(6 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pyrolysis (thermal degradation) is highly suitable for IR analysis of rubbers, and was employed as a sample preparation technique. Its process consists of separating the polymer from most of the formulation additives, isolating the base polymer (elastomer) structural unit to obtain adequate intensity IR bands for spectrum interpretation (Smith 1979, Rigoli et al 2021. The extraction is performed by an adequate solvent, which remove the soluble rubber additives.…”

Section: Methodsmentioning

confidence: 99%

“…The criteria that guided the choice of the best band intensity ratio were the calibration curve best linearity (R), data percentage explained by the methodology (R 2 ) and the methodology error, as exemplified in previous papers (Rigoli et al 2021, Carvalho et al 2021. For the EPDM/BR blend, it is non-overlapping bands.…”

Section: Methodsmentioning

confidence: 99%

“…Transmission FT-IR analysis, particularly in the middle infrared region (MIR), provides good results for the determination of elastomers content by the identification of the functional groups (Rigoli et al 2017, Damazio et al 2015, Sanches et al 2008. This technique also is useful for the evaluation of elastomers in binary mixtures, without overlapping of the analytical bands (Rigoli et al 2021, Riba et al 2019, Azevedo et al 2018. However, there is a researching gap regarding the MIR region for analysis of elastomers blends with overlapping bands, such as EPDM/BR.…”

Section: Introductionmentioning

confidence: 99%

“…FT-IR analysis was able to evaluate the elastomeric contents of the EPDM/CR blend in a faster and more accurate process. Rigoli et al (2021) cite in the paper that transmission mode is the most widely used spectra obtaining technique; however, studies usually fail to inform the methodology error.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, Rigoli et al (2021) proposed the quantification of EPDM/CR blends by using infrared analysis with the reflection UATR technique, combined with sample pretreatment (pyrolysis). Results showed that the UATR/pyrolysates methodology provides accurate results, which was confirmed by a test sample analysis.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Infrared quantification of binary rubber blends with overlapping bands

Barros

Murakami

Magalhães

et al. 2023

An. Acad. Bras. Ciênc.

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%