Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender

Песецкий, С. С.; Filimonov, O. V.; Koval, V. N.; Golubovich, V. V.

doi:10.3144/expresspolymlett.2009.76

Cited by 24 publications

(14 citation statements)

References 21 publications

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“…M n 's growth (MFI reduction) of PET containing CNM is not very substantial. This can be explained by high adsorptive (chemisorptive) surface activity of CNT and CC that causes partly blocking CE s isocyanate groups, and consequently, the decrease of the output of products of its interaction with ending groups of PET macromolecules [12,14].…”

Section: Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Nanodisperse Carbon Fillers and Isocyanate Chain Extender on Structure and Properties of Poly(ethylene terephthalate)

Agabekov

Golubovich

Песецкий

2012

Journal of Nanomaterials

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The effect of diisocyanate chain extender (CE) on the mechanical, rheological, and relaxation properties, as well as on molecular weight and crystallizability, of starting poly(ethylene terephthalate) (PET) and its composites containing carbon nanomaterials (CNM) such as carbon nanotubes (CNTs) and commercial carbon (CC) has been studied. The composites were compounded in molten PET using twin-screw extruder (screw diameter 35 mm; L/D = 40). To improve the distribution of CNM in the polymeric matrix (before introduction into the melt), they were blended with PET powder and subjected to an ultrasonic treatment in methylene chloride. The salient features of the materials structure were estimated based on DSC and relaxation spectrometry (dynamic mechanical analysis) data. It has been found that CNM additives partly suppress the PET-chain extension reactions which take place during interaction between macromolecular end groups and CE. Besides, both CNT and CC favour crystallizability of the modified PET owing to nucleation of the crystallization process. The influence of CNT appears to be more effective than that of CC. Enhancements in true mechanical strength and deformability of PET/CE/CNM composites, as against PET/CE materials, were found to be most clearly exhibited by the CNT-containing composites.

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Section: Characterizationmentioning

confidence: 99%

“…Several researchers have reported [4,9,14,15] that compounds containing isocyanate groups can be excellent CE for heterochain polyesters and their blends. However, together with the increase of PET molecular weight, partial crosslinking of macromolecules which slows down polymer crystallization is observed [15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanodisperse Carbon Fillers and Isocyanate Chain Extender on Structure and Properties of Poly(ethylene terephthalate)

Agabekov

Golubovich

Песецкий

2012

Journal of Nanomaterials

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“…Regarding the use of PET bottles, soft drinks and mineral water bottles make up the largest proportion, but it can be found in a wide range of packaging, such as food, cosmetics and pharmaceutical industries as well. In recent years, numerous studies have focused on the blends containing PET and other thermoplastic polymers, such as the characteristics of blends of PET/PP [10], PET/LDPE [11], PET/ABS [12,13], PET/PS [14], PET/PA [15] and PET/PC [16,17]. Hydrolytic and thermal degradation of polyester macromolecules is a major problem in the production of PET containing blends [18].…”

Section: Introductionmentioning

confidence: 99%

Remarkable Role of Experimental Olefin-Maleic-Anhydride Copolymer Based Compatibilizing Additives in Blends of Waste PET Bottles and Polyamide

Nagy

Varga

Kontos

et al. 2020

Waste Biomass Valor

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Over the past 50 years demand for plastics drastically increased worldwide resulting in plastic wastes causing serious environmental problems. The main market sector of European plastics industry is the packaging industry most of which are polyolefins and poly(ethylene-terephtalate). In the EU, 29.1 million tonnes of plastic waste were collected in 2018, of which 32.5% was recycled, 42.6% was recovered for energy, and 24.9% was landfilled (Plastics-the Facts, 2019). Although landfilling of collected waste in the EU is steadily declining, there is still too much unused waste. Polymer blends based on waste resources can solve the issues of recycling. The main purpose of the research was to produce polymer blends from waste based PET that have appropriate mechanical properties and rheological behaviour as well in order to find application areas where product requirements are not strict. Blends containing waste based PET were extrusion moulded and calenderd producing extrusion strings and films. Rheological and tensile properties of three types of PET/engineering thermoplastic blends (PET/PC, PET/PA and PET/ABS) were studied. Miscibility of components of the blends is limited leading to weak mechanical properties such as low tensile strength and/or elongation at break. Due to that phenomenon compatibilizing additives are also required. As compatibilizing additives olefin-maleic-anhydride copolymer based additives have been used in our experiments. Structure of additives differed from each other both in ratio and length of carbon chains of compounds linked to maleic-anhydride groups. Blends have been studied with PET content ranging from 10 to 90%. As an outstanding result improving of mechanical properties was achieved, for example almost 40% growth was observed in elongation at break of extruded 80/20 PET/PA blends in the presence of 0.2% compatibilizing additive compared to the sample without additive, meanwhile its strength has also improved. Graphic Abstract

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“…Polymer blends have received much commercial attention from researchers because they find use in many engineering applications and exhibit unique features, e.g., good mechanical properties, chemical resistance, and durability . Since the enhancement of mechanical properties is crucial for advanced applications such as automobile and aerospace, intense interest is focused on composites with MWCNTs.…”

Section: Introductionmentioning

confidence: 99%

Selective localization of carbon nanotubes in PC/PET blends

et al. 2015

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The localization of multi‐walled carbon nanotubes (MWCNTs) in immiscible polymer blends composed of polycarbonate (PC) and poly(ethylene terephthalate) (PET) is studied. Although partial miscibility is confirmed for the blend, presumably owing to the transesterification reaction, the MWCNT addition is found to have no influence on the miscibility. Moreover, morphological investigation and solvent extraction experiments reveal that MWCNTs are preferentially localized in PET phase. Thermal behavior demonstrates that MWCNTs act as an effective nucleating agent for PET, leading to the increment in crystallization temperature and crystallinity of PET. Tensile properties of PC/PET blends, i.e., Young's modulus, yield strength, and ultimate strength, are significantly improved by the addition of MWCNTs. POLYM. COMPOS., 38:1103–1111, 2017. © 2015 Society of Plastics Engineers

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Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender

Cited by 24 publications

References 21 publications

Effect of Nanodisperse Carbon Fillers and Isocyanate Chain Extender on Structure and Properties of Poly(ethylene terephthalate)

Effect of Nanodisperse Carbon Fillers and Isocyanate Chain Extender on Structure and Properties of Poly(ethylene terephthalate)

Remarkable Role of Experimental Olefin-Maleic-Anhydride Copolymer Based Compatibilizing Additives in Blends of Waste PET Bottles and Polyamide

Selective localization of carbon nanotubes in PC/PET blends

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