Fracture mechanics on polyethylene/polybutene-1 peel films

Nase, Michael; Langer, Beate; Grellmann, W.

doi:10.1016/j.polymertesting.2008.09.002

Cited by 51 publications

(45 citation statements)

References 18 publications

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“…With this research, we intend to further complete our previous efforts on evaluation/characterization of structure-property relations in PE-LD/iPB-1 blown films for peel film applications, which focused on the kinetics of crystal-crystal phase transition of iPB-1 in the presence of PE-LD [29], or the mechanics of the peeling process on application [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Structure of blown films of polyethylene/polybutene‐1 blends

Nase¹,

Funari²,

Michler³

et al. 2009

Polymer Engineering & Sci

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The structure of blown films of blends of low-density polyethylene (PE-LD) and isotactic polybutene-1 (iPB-1) with different content of iPB-1 was investigated using wide-and small-angle X-ray scattering (WAXS and SAXS), transmission electron microscopy (TEM), and polarizing optical microscopy (POM). TEM proves formation of a matrix-particle phase structure due to immiscibility of the blend components. Within the iPB-1 particles, needle-like crystals with c-axis orientation were observed. The PE-LD matrix showed two populations of crystals. WAXS data indicate that the majority of crystals were oriented with the c-axis perpendicular to machine direction (MD), while SAXS data prove additional presence of stacks of lamellae, oriented parallel to MD. Quantitative birefringence measurements showed that the majority of molecule segments were oriented in the direction of the circumference of the film, confirming the WAXS data. The crystal orientation has direct impact on mechanical properties, which was demonstrated by measurement of the anisotropy of the modulus of elasticity. POLYM. ENG. SCI., 50:249-256, 2010.

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Section: Introductionmentioning

confidence: 99%

Structure of blown films of polyethylene/polybutene‐1 blends

Nase¹,

Funari²,

Michler³

et al. 2009

Polymer Engineering & Sci

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“…The length of the peel seal was 10 mm, according to the dimensions of the sonotrode [Figure (a,b)]. The peel strength was determined by the average force between 20% and 80% of the elongation at break . The error bars represent the standard deviations of a mean of four individual tests.…”

Section: Methodsmentioning

confidence: 99%

Lamination of polyethylene composite films by ultrasonic welding: Investigation of peel behavior and identification of optimum welding parameters

Oordt¹,

Barb²,

Zengerle

et al. 2013

J of Applied Polymer Sci

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The lamination of different polyethylene (PE) composite films by ultrasonic welding to fabricate peelable seals that open at defined burst pressures is investigated. The sealing time, pressure, and amplitude were varied within the range of 100–400 ms, 50–250 kPa, and 12–24 µm, respectively. T‐peel tests and electron micrographs revealed four different peel regimes, depending on the parameter combination: (I) Interlaminar peeling at low‐peel strength with uniform peeling along a weakly bonded PE lamination layer; (II) transition tearing at intermediate peel strength showing areas of interlaminar peeling and translaminar tearing; (III) translaminar tearing at high‐peel strength showing tears through the entire film; and, (IV) undefined tearing at varying tear strength occurring when vibration effects during welding lead to insufficient contact of the films or high pressures lead to a displacement of PE. This study will allow the systematic adjustment of ultrasonic welding parameters for PE films. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40291.

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“…For the determination of the effective adhesion work various forms of peel tests can be performed, see [10,12,13,22,7,8]. A typical relation between the force F and the elongation of the film during peeling is shown in Fig.…”

Section: Determination Of Adhesion Work From Peel Testsmentioning

confidence: 99%

“…Example include flexible OLED and PLED devices [1][2][3], photovoltaic laminates [4][5][6] and polymer film packages [7,8]. An essential step in analysis of structural integrity of such components is to determine the work of adhesion between individual flexible layers or flexible layers on stiff substrates.…”

Section: Introductionmentioning

confidence: 99%