Nano-scale temperature dependent visco-elastic properties of polyethylene terephthalate (PET) using atomic force microscope (AFM)

Grant, Colin A.; Alfouzan, Abdulrahman; Gough, Tim; Twigg, Peter C.; Coates, Phil

doi:10.1016/j.micron.2012.06.004

Cited by 12 publications

(14 citation statements)

References 25 publications

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“…Probably, the mass ratio between PET and nanolaminates was too large, and hence the thermal properties of the composite material was governed by the PET. The results obtained in this study for the Tg and Tm of PET are in concordance with previous studies [37].…”

Section: Thermal Propertiessupporting

confidence: 92%

Layer-by-Layer Assembly of Food-Grade Alginate/Chitosan Nanolaminates: Formation and Physicochemical Characterization

et al. 2017

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The alternate deposition of oppositely charged materials (layer-by-layer technique) is an effective approach to functionalize materials. Biopolymer-based nanolaminates obtained by the layer-by-layer technique can also be used to change the surface properties of food products or food contact materials. However, the final properties of nanolaminates may be affected by the conditions of the adsorbing solutions. The objective of this study was to form and characterize the physicochemical properties of nanolaminates assembled from alginate and chitosan solutions. The effect of pH, ionic strength and polysaccharide concentration on the properties of the absorbing solutions was also evaluated. The ζ-potential, viscosity and whiteness index of the solutions were assessed before the assembly. Alginate/chitosan nanolaminates were characterized in terms of UV-visible spectroscopy, surface ζ-potential, contact angle, DSC analysis and SEM. The absorbance increased as a function of the number of polysaccharide layers on the substrate, suggesting an increase in the mass adsorbed. The surface ζ-potential of nanolaminates changed depending on the last polysaccharide deposited. Alginate layers were negatively charged, whereas chitosan layers were positively charged. Contact angles obtained in alginate layers were ≈ 10º, being mostly hydrophilic. Chitosan layers showed higher contact angle values (80º), indicating a more hydrophobic behavior. Microscopic examinations revealed the presence densely packed structures that corresponded to alginate/chitosan nanolaminates, having an estimated thickness of 700 nm. The results obtained in this work lay the basis for the rational design of polysaccharide-based nanolaminates in the food sector.

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Section: Thermal Propertiessupporting

confidence: 92%

Layer-by-Layer Assembly of Food-Grade Alginate/Chitosan Nanolaminates: Formation and Physicochemical Characterization

et al. 2017

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“…Polyester fibers have greater strength, heat resistance, and color stability as well as less corrosion and fewer problems with bonding to acrylic, compared to other fibers (Blanchemain et al, 2011, Grant et al, 2013, Moreno et al, 2011, Takahashi et al, 2012). In this study, polyester fibers were used as the reinforcement material in regular interim FPD materials including heat-polymerized PMMA, cold-polymerized PMMA, and bis-acrylic.…”

Section: Discussionmentioning

confidence: 99%

Effect of polyester fiber reinforcement on the mechanical properties of interim fixed partial dentures

Gopichander

Kumarai

Vasanthakumar

2015

The Saudi Dental Journal

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“…This set-up has been commonly used to calculate the elastic moduli of polyethylene terephthalate (PET) films 19 , collagen fibrils 20 and agar gels 21 . Accurate modulus values using AFM nanoindentation techniques were found when indenting a reference elastomer surface with known mechanical properties 22 .…”

Section: Equationmentioning

confidence: 99%

Strength of hydroentangled fabrics manufactured from photo-irradiated poly para-phenylene terephthalamide (PPTA) fibres

Wright

Carr

Grant

et al. 2015

Polymer Degradation and Stability

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Photo-irradiation of poly para-phenylene terephthalamide (PPTA) fibre is normally associated with deterioration of physical properties. Nonwoven fabrics produced from 100% photo-irradiated PPTA fibres might therefore be expected to yield fabrics with poorer mechanical properties compared to those produced from non-irradiated fibres.To test this hypothesis, the bursting strength of hydroentangled fabrics manufactured from photo-irradiated PPTA fibres was explored. Prior to fabric manufacture, virgin PPTA staple fibres were photo-irradiated under controlled lighting conditions (xenon short arc lamp with a luminous flux of 13000 lm) for 0, 5, 10, 20, 40, 60 and 100 hr. The photo-irradiated fibres were then hydroentangled to produce nonwoven fabrics. Photoirradiation exposure of PPTA fibre up to 30 MJ.m -2 was not found to be detrimental to fabric bursting strength and at irradiation energies of 5-10 MJ.m -2 a small, but statistically significant increase in fabric bursting strength was observed compared to fabrics manufactured from non-irradiated fibre. This may be linked to a change in the surface and skin properties of the PPTA photo-irradiated fibres identified by atomic force microscopy (AFM) following photo-irradiation.

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Nano-scale temperature dependent visco-elastic properties of polyethylene terephthalate (PET) using atomic force microscope (AFM)

Cited by 12 publications

References 25 publications

Layer-by-Layer Assembly of Food-Grade Alginate/Chitosan Nanolaminates: Formation and Physicochemical Characterization

Layer-by-Layer Assembly of Food-Grade Alginate/Chitosan Nanolaminates: Formation and Physicochemical Characterization

Effect of polyester fiber reinforcement on the mechanical properties of interim fixed partial dentures

Strength of hydroentangled fabrics manufactured from photo-irradiated poly para-phenylene terephthalamide (PPTA) fibres

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