Influence of a Multifunctional Epoxy Additive on the Performance of Polyamide 6 and PET Post-Consumed Blends during Processing

Anna Raffaela de Matos Costa (), Mariana Alves Henrique, Carlos Bruno Barreto Luna, Laura Hecker de Carvalho and Yêda Medeiros Bastos de Almeida
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Anna Raffaela de Matos Costa: Department of Materials Engineering, Federal University of Campina Grande, Campina Grande 58429-900, PB, Brazil
Mariana Alves Henrique: Department of Mechanical Engineering, Federal University of Pernambuco, Recife 50740-520, PE, Brazil
Carlos Bruno Barreto Luna: Department of Materials Engineering, Federal University of Campina Grande, Campina Grande 58429-900, PB, Brazil
Laura Hecker de Carvalho: Department of Materials Engineering, Federal University of Campina Grande, Campina Grande 58429-900, PB, Brazil
Yêda Medeiros Bastos de Almeida: Department of Chemical Engineering, Federal University of Pernambuco, Recife 50740-520, PE, Brazil

Sustainability, 2022, vol. 14, issue 24, 1-16

Abstract: In this study, a commercial chain extender (Polyad PR 002) in concentrations of 0.5, 1.0, and 1.5% w / w was used as a compatibilizer in post-consumed PET/PA6 blends (25/75, 50/50 e 75/25) processed in a laboratory mixer. The degradation rate, phase miscibility, chemical interaction, crystallization, and melting behavior, as well as the thermal stability of the mixtures, were analyzed by torque rheometry, scanning electron microscopy (SEM), FTIR spectroscopy, differential scanning calorimetry (DSC), and thermogravimetry (TGA), respectively. The results showed that the addition of 1% chain extender was sufficient to increase the melt viscosity of the PET-rich mixtures and 1.5% for the PA6-rich samples. Clearly, adding Polyad PR 002 to PET/PA6 blends improves polymer compatibility; for the 25%PET/75%PA6 blend with 1.5% PR 002, complete miscibility was observed, indicating a new compatible blend formation, revealing a chemical reaction between the systems, and proving the synergism between them. This chain extender did not affect the thermal stability of the blends, and the low contents employed reduced the crystallization rate of the blends investigated.

Keywords: compatibilization; PET/PA6 mixtures; epoxy additive (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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