Uniaxial-planar deformation of poly(ethylene terephthalate) films: 1. Characterization of the crystalline phase

Lapersonne, Philippe; Tassin, Jean-François; Monnerie, L.; Beautemps, J.

doi:10.1016/0032-3861(91)90536-r

Cited by 34 publications

(13 citation statements)

References 16 publications

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“…The orientation is thus uniplanar-axial as described by Murakami et al 10 This result is qualitatively similar to previous observations of the orientation of the phenyl rings in PET, 11,12 although in this latter case orientation is obtained after rolling the films. The main population is in the orientation of the single crystal having naphthalene plane in the plane of the film.…”

Section: Resultssupporting

confidence: 90%

Morphology and texture development of uniaxially stretched poly(ethylene naphthalene‐2,6‐dicarboxylate)

Douillard

Hakmé

David

et al. 2006

J of Applied Polymer Sci

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The texture development of PEN films with different semicrystalline morphologies have been studied by X-ray diffraction. These different structures have been obtained by uniaxially stretching PEN amorphous films at 100 and 1608C (below and above T g ) at different drawing ratios. Samples have also been characterized by DSC to determine the crystallinity ratios, the crystallization, and melting temperatures. To define the orientation of crystallites in the oriented samples, pole figures have been constructed, as a function of temperature and drawing ratio (DR) in the range 1.5-4. In the range from DR ¼ 2 to 4 the orientation is clearly uniplanar-axial. At T draw ¼ 1008C the crystallinity shown by DSC analysis is higher than the sample stretched at 1608C. The orientation is also higher when samples are stretched at 1008C. The naphthalene rings mainly stay in the plane of the film with a lower fraction perpendicular to the plane of the film.

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Section: Resultssupporting

confidence: 90%

Morphology and texture development of uniaxially stretched poly(ethylene naphthalene‐2,6‐dicarboxylate)

Douillard

Hakmé

David

et al. 2006

J of Applied Polymer Sci

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“…In Ref. [20], the planar stretching of PET films at a constant load just above the glass-transition temperature was examined. In Ref.…”

Section: Figmentioning

confidence: 99%

“…The DSC used here is a module of the METTLER TOLEDO STAR e thermoanalysis system and is performed between 20 C and 300 C, with a specimen weight of 20.83 mg and a heating rate of 10 C/min. In Fig.…”

Section: Materials Characterizationmentioning

confidence: 99%

Comparison of stretched polycarbonate films produced on a stretching line and a stretching frame

Wibbeke

Schöppner

2013

Polymer Engineering & Sci

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Various methods can be used for the axial stretching of polycarbonate films. This article compares uniaxially stretched films, produced on a stretching line by the short‐gap method, with planar‐stretched films that were produced on a stretching frame. The process affects the mechanical properties in the stretching direction as well as transversely. Because the stretching technologies differ primarily in the contraction of the film width, an analysis of the mechanical properties in the transverse direction is of particular interest. POLYM. ENG. SCI., 54:1848–1857, 2014. © 2013 Society of Plastics Engineers

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“…FTIR spectroscopy has been used to study the orientation at the molecular level of samples showing optical anisotropy such as oriented polymers and thin films 12–16. Scott et al17 have used polarized Fourier transform infrared spectroscopy FTIR to evaluate the structural angles of transition moments in the case of uniaxially stretched PEN at 150 °C.…”

Section: Introductionmentioning

confidence: 99%

Orientation of uniaxially stretched poly(ethylene naphthalene 2,6‐dicarboxylate) films by polarized infrared spectroscopy

Hakmé

Stevenson

Voice

et al. 2007

J Polym Sci B Polym Phys

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Poly(ethylene naphthalene‐2,6‐dicarboxylate) has been uniaxially stretched at different draw ratios and at two different temperatures below and above its glass transition (Tg ∼ 120 °C) respectively, at 100 and 160 °C. Crystallinity has been evaluated from calorimetric analyses and compared to the values deduced by FTIR spectroscopic data. As expected, the obtained results are quite similar and show that films stretched at lower temperature (100 °C) are more crystalline than those stretched at 160 °C. Optical anisotropy associated with orientation has been evaluated by birefringence and show that films stretched at 100 °C are more birefringent than those stretched at 160 °C as a result of a higher chain relaxation above Tg. Polarized FTIR was also performed to evaluate the individual orientation of amorphous and crystalline phases by calculating dichroic ratios R and orientation functions 〈P2(cos θ)〉 and also show that amorphous and crystalline phases are more oriented in the case of films stretched below Tg. Nevertheless, the orientation of the amorphous phase is always weaker than that of the crystalline phase. Films stretched at 100 °C show a rapid increase in orientation (and crystallinity) with draw ratio and 〈P2(cos θ)〉 reaches a limit value when draw ratio becomes higher than 3.5. Films drawn at 160 °C are less oriented and their orientation is increasing progressively with draw ratio without showing a plateau. A careful measurement of the IR absorbance was necessary to evaluate the structural angles of the transition moments to the molecular chain axis. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 1950–1958, 2007

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Uniaxial-planar deformation of poly(ethylene terephthalate) films: 1. Characterization of the crystalline phase

Cited by 34 publications

References 16 publications

Morphology and texture development of uniaxially stretched poly(ethylene naphthalene‐2,6‐dicarboxylate)

Morphology and texture development of uniaxially stretched poly(ethylene naphthalene‐2,6‐dicarboxylate)

Comparison of stretched polycarbonate films produced on a stretching line and a stretching frame

Orientation of uniaxially stretched poly(ethylene naphthalene 2,6‐dicarboxylate) films by polarized infrared spectroscopy

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