Effect of kind and content of organo‐modified clay on properties of PET nanocomposites

Scaffaro, R.; Botta, Luigi; Ceraulo, M.; Mantia, Francesco Paolo La

doi:10.1002/app.34087

Cited by 48 publications

(71 citation statements)

References 33 publications

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“…In Figure 2, there are reported the XRD patterns of blends compatibilized with EAA, Figure 2a, HDAA, Figure 2b and EGMA, Figure 2c, prepared by single extrusion (E1), re-extrusion (E2) and extrusion with a masterbatch (MB). As reported in our previous works, the XRD pattern of Cloisite 15A (here not reported for sake of clarity) presents a main broad peak at 2.8° (the position is indicated with dotted vertical lines included in Figure 2a-2c) corresponding to a d-spacing of 3.15 nm [26,[35][36][37]. In Table 3 there are reported the values of 2% corresponding to the main diffraction peak of the XRD patterns and the respective values of interlayer distance calculated by Bragg's law.…”

Section: Results and Discussion 31 X-ray Diffractometry (Xrd)supporting

confidence: 63%

Processing – morphology – property relationships of polyamide 6/polyethylene blend–clay nanocomposites

Scaffaro¹,

Botta²,

Mistretta³

et al. 2013

Express Polym. Lett.

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Abstract. In this work, we studied the effect of the method of preparation and of reprocessing on the morphology and, consequently, on the physical properties of polyamide 6 (PA6)/ high density polyethylene (HDPE)-clay nanocomposite blends in the presence of different compatibilizers. In particular, the nanocomposites were obtained by melt mixing using a corotating twin screw extruder (E1). The blends thus obtained were re-extruded (E2) under the same operating conditions. Moreover, blends with the same final composition were produced using a masterbatch of the compatibilizer with the clay prepared in a separated stage in a batch mixer (MB). All the materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD) analyses. In addition, the rheological behaviour and the, tensile and impact, properties were evaluated. The XRD and TEM analysis showed that re-extrusion slightly improves the morphology of the nanocomposites. A further improvement of the morphology, in terms of lower clay dimension and better dispersion, was observed in the MB blends. The results of the mechanical tests showed that reprocessing (E2) induced an increase of all the properties for all the three systems. A further general increase of the mechanical properties was showed by the MB blends.

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Section: Results and Discussion 31 X-ray Diffractometry (Xrd)supporting

confidence: 63%

Processing – morphology – property relationships of polyamide 6/polyethylene blend–clay nanocomposites

Scaffaro¹,

Botta²,

Mistretta³

et al. 2013

Express Polym. Lett.

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“…Moreover, the rate of decrease of M v of PLA + OM-HT is higher than that PLA+U-HT. This result is probably due to the presence of the organic modifier that could promote the degradation phenomena, as reported in the scientific literature [42]. Results derived from DSC measurements are summarized in Table 2.…”

Section: Resultsmentioning

confidence: 52%

Structure-properties relationships in melt reprocessed PLA/hydrotalcites nanocomposites

Scaffaro¹,

Sutera²,

Mistretta³

et al. 2017

Express Polym. Lett.

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Abstract. In this work the effect of multiple reprocessing was studied on molecular structure, morphology and properties of poly(lactic acid)/hydrotalcites (PLA/HT) nanocomposites compared to neat PLA. In addition, the influence of two different kinds of HT -organically modified (OM-HT) and unmodified (U-HT) -was evaluated. Thermo-mechanical degradation was induced by means of five subsequent extrusion cycles. The performance of the recycled materials was investigated by mechanical and rheological tests, differential scanning calorimetry (DSC), intrinsic viscosity measurements and SEM observation. The results indicated that the best morphology was achieved in the systems incorporating OM-HT. On increasing the extrusion reprocessing cycles, the properties showed behavior due to two opposite effects: i) chain scission due to thermo-mechanical degradation and ii) filler dispersion effect resulting from multiple processing. In particular, at low reprocessing cycles, both tensile and rheological properties seem to be mainly affected by HT dispersion, especially when OM-HT was added. After five reprocessing cycles, on the contrary, chain scission, i.e. thermo-mechanical degradation, dominated. As regards the effect of the presence of organic modifier in HT, the results indicated that this variable apparently did not affect the macroscopic performance of the nanocomposites, especially at high reprocessing cycles.

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“…However, interfacial frictional stress caused by matrix shrinkage during the curing process may have accounted for the strengthening of the composite. In another study, Scaffaro et al 7 reported the effect of nature and content of organically modified clay on the properties of PET nanocomposites. However, the filler content used were low (3, 5 and 10 wt%) for each kind of Cloisite clay (15A and 30B), when compared to the contents used in the present study.…”

Section: Introductionmentioning

confidence: 99%

Processing and Characterization of PET Composites Reinforced With Geopolymer Concrete Waste

et al. 2017

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In the present study, poly (ethylene terephthalate)-based composites were produced and characterized. These composites were composed by poly (ethylene terephthalate) (PET) reinforced with geopolymer concrete waste (GCW). Both untreated (U-GCW) and treated with oleic acid (OA) geopolymer concrete waste (T-GCW) were used in the production of the composites. The PET/GCW ratios used for either treated or untreated GCW bodies were 80/20 (wt%), 60/40 (wt%) and 50/50 (wt%). Chemical compositions were assessed by X-ray fluorescence spectroscopy (XRF), crystallinity by differential scanning calorimetry (DSC), thermal stability by thermogravimetry (TGA), microstructure by field emission gun scanning electron microscopy (FEG-SEM) with energy dispersive X-ray spectroscopy (EDS), and mechanical properties were assessed by compression tests. Fourier transform infrared spectroscopy (FT-IR) was used to check the efficiency of the treatment with OA, as well as the interaction between PET and GCW. The T-GCW PET composites showed better thermal, physical, and mechanical properties, for non-structural applications, when compared to U-GCW.

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Effect of kind and content of organo‐modified clay on properties of PET nanocomposites

Cited by 48 publications

References 33 publications

Processing – morphology – property relationships of polyamide 6/polyethylene blend–clay nanocomposites

Processing – morphology – property relationships of polyamide 6/polyethylene blend–clay nanocomposites

Structure-properties relationships in melt reprocessed PLA/hydrotalcites nanocomposites

Processing and Characterization of PET Composites Reinforced With Geopolymer Concrete Waste

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