Morphology and properties of poly(ethylene terephthalate) and thermoplastic polyester elastomer blends modified in the melt by a diisocyanate chain extender and filled with a short glass fiber

Recycled poly (ethylene terephthalate) or R-PET is conventionally melt blended with polycarbonate with the presence of chain extender in order to produce polymer blend that provides good mechanical properties and cost effectiveness. This research was carried out to improve properties of such a blend by compounding them with silane treated hollow glass microspheres (HGMs), which mixing procedure was emphasized how it could affect mechanical properties. R-PET/PC/HGM composites of a fixed composition were melt compounded with three different mixing procedures. It was found that the compounding HGMs with PC and then R-PET obtained the most rigidity specimens than the all-in-one compounding or the compounding HGMs with R-PET and then PC. Silane treated HGMs were well distributed in the polymer matrix presenting good interfacial adhesion. However, the notched impact strength of all composites were inspected to be in the same range.

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Influence of fibre weight fraction on failure mechanisms of poly(ethylene terephthalate) reinforced by short-glass-fibres

Journal of Materials Science ◽

10.1007/bf00612401 ◽

1991 ◽

Vol 26 (17) ◽

pp. 4648-4656 ◽

Cited By ~ 39

Author(s):

Kiyoshi Takahashi ◽

Nak-Sam Choi

Keyword(s):

Ethylene Terephthalate ◽

Failure Mechanisms ◽

Weight Fraction ◽

Glass Fibres ◽

Poly Ethylene Terephthalate ◽

Poly Ethylene ◽

Short Glass

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Improving the properties of recycled PET/PEN blends by using different chain extenders

Journal of Polymer Engineering ◽

10.1515/polyeng-2015-0268 ◽

2016 ◽

Vol 36 (6) ◽

pp. 615-624 ◽

Cited By ~ 3

Author(s):

Simge Can ◽

N. Gamze Karsli ◽

Sertan Yesil ◽

Ayse Aytac

Keyword(s):

Ethylene Terephthalate ◽

Chain Extender ◽

Degree Of Crystallinity ◽

Recycled Pet ◽

H Nmr ◽

Loading Level ◽

Poly Ethylene Terephthalate ◽

Chain Extenders ◽

Izod Impact ◽

Poly Ethylene

Abstract The main aim of this study was to improve the mechanical properties of the recycled poly(ethylene terephthalate)/poly(ethylene 2,6-naphthalate) (r-PET/PEN) blends by enhancing the miscibility between PET and PEN with the usage of chain extenders. This idea was novel for the recycled PET-based r-PET/PEN blends, as investigation of the effects of the chain extender usage on the properties of r-PET/PEN blends has not been studied in the literature, according to our knowledge. 1,4-Phenylene-bis-oxazoline (PBO), 1,4-phenylene-di-isocyanate (PDI), and triphenyl phosphite (TPP) were selected as chain extenders. The maximum tensile strength value was observed for the 1.0PDI sample. Moreover, PDI-based blends exhibited better Izod impact strength when compared with all other samples. The miscibility and degree of crystallinity values of all blends were discussed by means of thermal analysis. 1H-nuclear magnetic resonance (1H-NMR) analysis was carried out to determine transesterification reaction levels. According to 1H-NMR results, the increase in the level of transesterification was around 40% with the usage of PDI. The optimum loading level for selected chain extenders was determined as 1 wt.%, and PDI-based blends exhibited better properties when compared with those of the blends based on PBO and TPP at this loading level.

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