The dependence of tear behaviour on the microstructure of biaxially drawn polyester film

Kuusipalo, Jurkka; Savijärvi, A.-M.; Norval, S.; Adlen, M. J.; MacKerron, D.

doi:10.1023/b:jmsc.0000047532.34562.bc

Cited by 12 publications

(9 citation statements)

References 18 publications

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“…During biaxial drawing of PET film, molecules acquire mainly two types of orientations, in MD and in TD [34,35,3]. Thus pre-stretches of the viscoelastic hardening modes can be linked to deformations of the film, which occur in MD and TD drawing steps.…”

Section: Discussionmentioning

confidence: 99%

Micromechanical modelling of reversible and irreversible thermo-mechanical deformation of oriented polyethylene terephthalate

Poluektov

Dommelen

Govaert

et al. 2015

Computational Materials Science

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Section: Discussionmentioning

confidence: 99%

Micromechanical modelling of reversible and irreversible thermo-mechanical deformation of oriented polyethylene terephthalate

Poluektov

Dommelen

Govaert

et al. 2015

Computational Materials Science

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“…The PET membranes used here were biaxially stretched by the supplier to improve mechanical strength. It is well‐known that such biaxial‐oriented PET membranes are laminar 27–29. We suggest that the planar projections observed at long etch times result because the etch solution is able to penetrate deeper into the polymer along the interfaces between the strata.…”

Section: Resultsmentioning

confidence: 72%

Controlling the Length of Conical Pores Etched in Ion‐Tracked Poly(ethylene terephthalate) Membranes

Mukaibo

Horne

Park

et al. 2009

Small

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An etching procedure that allows for reproducible control of the length of conically shaped pores etched into poly(ethylene terephthalate) (PET) membranes is developed. At the lower etch temperature used (20 degrees C), the length of the pore is found to be linearly related to etch time. At the higher etch temperature (30 degrees C) the etch rate is five times faster and the pores quickly propagate through the entire thickness of the PET membrane. Hence, the lower etch temperature is best for controlling the pore length. Pores etched at this temperature are used to prepare arrays of gold cones where the length of the cones is controlled from 1 to 10 microm. The track-etch rates and the radial-etch rates at both of the etch temperatures used are also reported.

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“…3a), the aggregates were scattered randomly throughout the binder matrix, similar to what has been reported for metal microparticles dispersed in a homogeneous polymer matrix. 27,28,[37][38][39] On the other hand, when the samples were prepared under the inuence of the magnetic eld (Fig. 3b), we observed regions where Ni MPs were anisotropically aligned as linear aggregates along the magnetic eld lines (Fig.…”

Section: Alignment Of Ni Mpsmentioning

confidence: 87%

A magnetically tuneable piezoresistive sensor for direct, in situ strain measurements in Li-ion batteries

2015

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This paper demonstrates the first example of using generic Li-ion battery components (nickel, carboxymethylcellulose and styrene-butadiene rubber) to prepare piezoresistive materials (PRMs) which detect the strain of lithiating Sn in operando. The PRM was prepared by mixing the three components and molding it into a desired shape. Three different types of Ni microparticle arrangement strategies were investigated to study their effects on the piezoresistive performance: an alignment parallel to or perpendicular to the direction of strain, and no alignment (control and random dispersion). The alignment was directed by an external magnetic field during sample preparation and confirmed using cross-sectional SEM images. Significant differences were found between the different alignments, with the parallel alignment resulting in the lowest percolation threshold of 4 vol% Ni and perpendicular alignment the highest of 11 vol% Ni. For a fixed fraction of Ni microparticles at 4 vol%, the difference in alignment resulted in a difference in the gauge factor by three orders of magnitude. The stress-strain curve of the prepared PRMs showed a typical response seen for porous structures, which was consistent with the SEM images. The PRM samples are compatible with the low operating potential and the organic Li-ion electrolyte, and its porous structure allows electrolyte infusion that ensures the ionic conductivity of the material. Lithiation of Sn was successfully detected as a change in resistance using a parallelly aligned PRM with no additional treatment. The method described here offers significant merits over conventional approaches: the ability to directly monitor the strain without complex modelling, the simple low cost setup that does not require specialized equipment, and the ability to easily control the PRM performance by magnetically directed assembly.

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The dependence of tear behaviour on the microstructure of biaxially drawn polyester film

Cited by 12 publications

References 18 publications

Micromechanical modelling of reversible and irreversible thermo-mechanical deformation of oriented polyethylene terephthalate

Micromechanical modelling of reversible and irreversible thermo-mechanical deformation of oriented polyethylene terephthalate

Controlling the Length of Conical Pores Etched in Ion‐Tracked Poly(ethylene terephthalate) Membranes

A magnetically tuneable piezoresistive sensor for direct, in situ strain measurements in Li-ion batteries

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