Comparação de Técnicas FTIR de Transmissão, Reflexão e Fotoacústica na Análise de Poliamida-6, Reciclada e Irradiada

Evora, Maria Cecilia; Gonçalez, Odair Lélis; Dutra, Rita C. L.; Diniz, Milton Faria; Wiebeck, Hélio; Silva, Leonardo Gondim de Andrade e

doi:10.1590/s0104-14282002000100013

Cited by 30 publications

(15 citation statements)

References 14 publications

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“…Figure shows the FTIR spectra for the pure Col films and plasticized nanocomposites prepared by methods 1 and 2. The Col FTIR spectrum was characterized by the presence of typical amide bands denominated as A, B, I, II, and III . Amide I showed a characteristic band at 1654 cm −1 due to the stretching vibrations of CO group.…”

Section: Resultsmentioning

confidence: 97%

Biobased nanocomposites based on collagen, cellulose nanocrystals, and plasticizers

Rodrigues

Souza

Gil

et al. 2017

J of Applied Polymer Sci

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Collagen (Col) is extensively used in various applications, including pharmaceutical, agricultural, and food applications. The materials based in Col may exhibit properties of biomedical interest because of their low toxicity, high structural capacity support, controlled biodegradability, and biocompatibility. However, Col has poor thermal and mechanical properties. The addition of plasticizers (Plas's) and fillers is an established strategy for enhancing the properties of the resulting nanocomposites. In this study, nanocomposites based on Col and cellulose nanocrystals were developed in two different ways and with three different Plas's. These materials were subjected to structural, thermal, mechanical, and morphological analysis. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44954.

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Section: Resultsmentioning

confidence: 97%

Biobased nanocomposites based on collagen, cellulose nanocrystals, and plasticizers

Rodrigues

Souza

Gil

et al. 2017

J of Applied Polymer Sci

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“…The characteristic band at 1550 cm −1 is associated with the stretching of the group NH and CN deformation and the band at 1300 cm −1 is due to (CH 2 ) 5 groups. The band at 1135 cm −1 is attributed to the complex vibration of the amide group and methylene chain and/or combination of NH deformation and O=CN stretching, and the band at 934 cm −1 corresponding to the deformation of NH [22][23][24]. The similarity of the spectra indicates that the vacuum compression molding process did not cause significant chemical changes in the structure of the PA6 films.…”

Section: Characterization Of Post-processing Pa6mentioning

confidence: 83%

A New Strategy for the Use of Post-Processing Vacuum Bags from Aerospace Supplies: Nucleating Agent to LLDPE Phase in PA6/LLDPE Blends

et al. 2019

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In the aerospace industry, many composite parts are manufactured by processes using plastic vacuum bags made of polyamide 6 (PA6) as a consumable material. This implies that after demolding the part, this plastic material should be discarded, generating a considerable amount of waste. Tons of vacuum bags are discarded and incinerated per month by several companies in this sector, which highlights the need to recycle and/or reuse this material. PA6/linear low-density polyethylene (LLDPE) blends are of great technological interest because they can combine the excellent thermo-mechanical and oxygen barrier properties of the PA6 with high impact strength, good processability, and low cost of LLDPE. The replacement of neat PA6 by the post-processing vacuum bags residue PA6 may be a new strategy for the recycling of this material. In this work, PA6/LLDPE/maleic anhydride-grafted LLDPE (LLDPE-g-MA) (90/5/5) blends were prepared using a co-rotational twin-screw extruder and the neat PA6 was replaced by different contents of post-processing PA6 (5, 10, 15 and 20 wt.%). The mechanical, thermal, and morphological characterization was evaluated. The increase in the content of post-processing PA6 caused an increase in the crystallinity degree of the LLDPE phase, acting as a nucleating agent to the LLDPE phase, reducing the toughening effect of this phase in the blends and, therefore, providing this phase to act as a reinforcing agent.

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“…A caracterização e quantificação por espectroscopia IR de diversos polímeros e suas blendas constitui, também, uma importante linha de pesquisa desenvolvida em nosso Centro de Pesquisa [10,[12][13][14][15] . Entretanto, a combinação de técnicas FT-IR de transmissão, reflexão e PAS não foi ainda utilizada para a caracterização de filmes multicamadas em nossos laboratórios.…”

Section: Introductionunclassified

Avaliação da aplicabilidade de técnicas MIC/FT-IR/DSC para a caracterização de filmes multicamadas

Nogueira

Dutra²,

Diniz³

et al. 2007

Polímeros

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Técnicas FT-IR de transmissão, reflexão atenuada (ATR), reflexão difusa (DRIFT), microscopia acoplada ao FT-IR (MIC/FT-IR) e detecção fotoacústica (PAS) foram utilizadas para a caracterização de filmes multicamadas. As técnicas ATR, MIC/FT-IR e PAS apresentaram os melhores resultados, provavelmente em função da possibilidade de análise somente da superfície das amostras com cristal (ATR), análise de cada camada da amostra separadamente (MIC/FT-IR) e possibilidade de variação da velocidade de obtenção do espectro (PAS). Dados de análises de microscopia ótica (MO) e calorimetria exploratória diferencial (DSC) foram usados, associados aos dados FT-IR, para a caracterização completa dos materiais.

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Comparação de Técnicas FTIR de Transmissão, Reflexão e Fotoacústica na Análise de Poliamida-6, Reciclada e Irradiada

Cited by 30 publications

References 14 publications

Biobased nanocomposites based on collagen, cellulose nanocrystals, and plasticizers

Biobased nanocomposites based on collagen, cellulose nanocrystals, and plasticizers

A New Strategy for the Use of Post-Processing Vacuum Bags from Aerospace Supplies: Nucleating Agent to LLDPE Phase in PA6/LLDPE Blends

Avaliação da aplicabilidade de técnicas MIC/FT-IR/DSC para a caracterização de filmes multicamadas

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