Solid state polymerization of pet/pc extruded blend: effect of reaction temperature on thermal, morphological and viscosity properties

Mendes, Luís Claudio; Mallet, Isaac Albert; Cestari, Sibele Piedade; Dias, Frederico G. de A.; Pereira, Patrícia Soares da Costa

doi:10.1590/0104-1428.1518

Cited by 9 publications

(3 citation statements)

References 15 publications

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“…This process does not use solvents nor toxic components and is conducted under vacuum, at high temperatures, between the T g and melting temperature of the oligomers, allowing the mobility of the chains in the amorphous domains of the material, to reach functional groups and, thus, the condensation between them increases the molar mass. [ 85 ] Figure 5 demonstrates this process in a simplified way.…”

Section: Pbsmentioning

confidence: 99%

Current Status and Perspectives on the Green Synthesis of Succinic Polyesters for Value‐Added Applications

Gucker

Sayer

Oliveira

et al. 2023

Macro Reaction Engineering

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Polybutylene succinate (PBS) and other succinic (co)polyesters are biodegradable polymers with favorable mechanical and thermal properties that find use in many applications. Due to environmental concerns, polymers based on succinic acid (SA) have been gaining attention, as SA can be produced through biotechnological processes. Thus, this review aims to highlight the synthesis and characteristics of PBS and other succinic copolyesters, with emphasis in the works employing metallic catalysts and enzymes. In addition, the modification of the macromolecular structure by copolymerization or postpolymerization is also discussed. Currently, metallic catalysts are normally used in the synthesis of these materials, under conditions of high temperatures, which can favor the occurrence of thermal degradation, increasing the dispersion of chain length distributions. Moreover, the incrustation of metallic catalysts in polymeric materials makes their application in biomedical products difficult, due to toxicity requirements. In this context, enzymatic catalysis is gaining ground, offering milder synthesis temperatures, high selectivity, and uniformity of synthesized products. This biotechnological route can substitute oligomerization processes with metallic catalysis in future industrial processes, producing materials free from metallic contamination. In addition to production by catalytic routes, trends for future applications of succinic (co)polyesters are presented, with emphasis on the value‐added materials sectors.

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Section: Pbsmentioning

confidence: 99%

Current Status and Perspectives on the Green Synthesis of Succinic Polyesters for Value‐Added Applications

Gucker

Sayer

Oliveira

et al. 2023

Macro Reaction Engineering

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“…Polymer blending is in fact a more economical method for making new materials or compounds compared to direct polymer synthesis. For this reason, a lot of research studies have been focused on the study of the best blending method of these polymers [1,2,3,4,5], and many studies evaluated the reactions that occur between them [6,7].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Different Compatibilizers on the Properties of a Post-Industrial PC/PET Blend

et al. 2018

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The substitution of virgin resins by recycled ones is a worldwide tendency that is supported by the fluctuation of oil prices and the transition to a circular economy. Polymeric blends have been intensively studied because of their ability to provide tailored properties for particular applications. However, in their design phases, the issue of end-life re-use had not been well addressed, and now difficulties in their recycling are arising. In this study, we investigated the effect of three different compatibilizers: two chain extenders (CEs), (1) a styrene-acrylic oligomer (ESAo), and (2) methylene diphenyl diisocyanate (MDI) and an impact strength modifier, (3) an ethylene copolymer (EMAco), for the recycle of a post-industrial polycarbonate/polyethylene terephthalate (PC/PET) blend. The materials were prepared by reactive extrusion and characterized by intrinsic viscosity (IV) measurements, mechanical tests, differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy analysis (FTIR), and transmission electron microscopy (TEM). The introduction of each additive has been demonstrated to improve the compatibility between PET and PC in the post-industrial blend, leading to enhanced mechanical properties. The IV measurements increased to values that were comparable to the virgin material. In addition, CEs affected the crystallization of PET (as they reduced the degree of crystallinity), while EMAco acted as a nucleating agent. Morphological analysis enabled confirming the compatibilization effects induced by the tested additives.

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“…Mendes et al . studied the effect of the reaction temperature on the thermal, morphological, and viscosity properties of solid‐state polymerized PET/Polycarbonate (PC) extruded blends.…”

Section: Introductionmentioning

confidence: 99%

Morphology and thermal properties of recycled polyacrylonitrile fiber blends with poly(ethylene terephthalate): Microstructural characterization

Adegbola

Rotimi

Ray

2016

J of Applied Polymer Sci

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The compounding of rPAN/PET [polyacrylonitrile/poly(ethylene terephthalate]; 30/70, 50/50, and 70/30 wt %) using a melt-blending technique was the main focus of this investigation. An X-ray diffraction study indicated the possibility of interphase boundary interactions between the polymer matrices in the blends. The differential scanning calorimetry results showed that varying the ratios of rPAN in the blends marginally improved the processing temperature of PET. The thermogravimetric analysis revealed that the addition of PET up to 70% increased the thermal stability of the blend, and adding more than 70% of PET resulted in poor adhesion between the matrix and phase. On the basis of the results obtained, we propose a general understanding of how the morphology and the mechanical and thermal properties of the blend could assist in the development of rPAN blends with PET, rather than disposing of the viable materials as wastes.

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Solid state polymerization of pet/pc extruded blend: effect of reaction temperature on thermal, morphological and viscosity properties

Cited by 9 publications

References 15 publications

Current Status and Perspectives on the Green Synthesis of Succinic Polyesters for Value‐Added Applications

Current Status and Perspectives on the Green Synthesis of Succinic Polyesters for Value‐Added Applications

The Effect of Different Compatibilizers on the Properties of a Post-Industrial PC/PET Blend

Morphology and thermal properties of recycled polyacrylonitrile fiber blends with poly(ethylene terephthalate): Microstructural characterization

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