Solid State Polymerization: Its action on thermal and rheological properties of PET/PC reactive blends

Mendes, Luís Claudio; Pereira, Patrícia Soares da Costa

doi:10.4322/polimeros.2013.031

Cited by 13 publications

(7 citation statements)

References 14 publications

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“…They described that a copolymer was produced through a simultaneous SSP and ester-carbonate interchange reaction. More recently, Mendes and Pereira [17] published an article on SSP of PET/PC reactive blends, with and without cobalt catalyst, at different polymer ratios, focusing on rheological and thermal properties.…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2014

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A systematic study of solid state polymerization (SSP), concerning the melt extruded blend of poly(ethylene terephthalate)/polycarbonate (catalyzed PET/PC, 80/20 wt %), as a function of temperature range (180-190°C) for a fixed time (6 h) is presented. The materials obtained were evaluated by differential scanning calorimetry (DSC), thermogravimetry/derivative thermogravimetry (TG/DTG), optical microscopy (OM) and intrinsic viscosity (IV) analysis. After SSP, at all reaction temperatures, PET glass transition and heating crystallization temperatures slightly decreased, melting temperature slightly increased, while degree of crystallinity was practically invariable. The DTG curves indicated that, at least, three phases remained. The OM images revealed that the morphology is constituted of a PET matrix and a PC dispersed phase. In the interfacial region we noticed the appearance of structures like bridges linking the matrix and the dispersed domains. These bridges were correlated to the PET/PC block copolymer obtained during blending in the molten state. IV increased for all polymerization temperatures, due to the occurrence of PET chain extension reactions -esterification and transesterification. The IV range for bottle grade PET was achieved.

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Section: Resultsmentioning

confidence: 99%

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

et al. 2014

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“…PET is a semicrystalline thermoplastic polyester widely used in several applications due to its low relative cost, good mechanical properties, and easy processing. 4 -6 Nonetheless, PET is one of the most consumed plastics, and it is used in numerous applications with short shelf life, such as disposable bottles and other packaging, generating a large volume of waste that is often inappropriately disposed in the environment. 7 Therefore, considering the importance of looking for applications that stimulate the recycling of the PET residue, the present study was developed using recycled PET water bottles.…”

Section: Introductionmentioning

confidence: 99%

Blend of recycled poly(ethylene terephthalate) and polycarbonate with polyaniline for antistatic packaging

Silva

Barcelos

Silva

et al. 2019

Polymers and Polymer Composites

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Antistatic packagings are very important for proper transportation and storage of electronic components since these components can be damaged with electric overloads generated through rubbing. Therefore, the purpose of this study was to develop an innovative material for antistatic packaging with a sustainable character. For this, a blend of recycled poly(ethylene terephthalate) (PET), polycarbonate (PC), and polyaniline (PAni) was prepared by melt extrusion. Samples have a final content of 68 wt% of PET, 29 wt% of PC, and 3 wt% of PAni doped with cobalt (PAni-Co). The properties were determined by differential scanning calorimetry, thermogravimetric analysis, tensile testing, electrical resistivity analysis, and Fourier transform infrared spectroscopy. To the best of our knowledge, no previous work studied the incorporation of PAni-Co in PET/PC blend.

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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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Solid State Polymerization: Its action on thermal and rheological properties of PET/PC reactive blends

Cited by 13 publications

References 14 publications

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

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

Blend of recycled poly(ethylene terephthalate) and polycarbonate with polyaniline for antistatic packaging

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

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