Morphological alterations during texture-producing plastic plane strain compression of high-density polyethylene

Gałęski, Andrzej; Bartczak, Z.; Argon, A. S.; Cohen, R. E.

doi:10.1021/ma00047a023

Cited by 240 publications

(242 citation statements)

References 7 publications

(11 reference statements)

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“…4, curves a and c). That is because the scattering intensity Starting with the yield the plastic deformation sets in: chain slips in crystals 33 and respective deformation of amorphous phase caused by lamellae glide and lamellae rotation 8,34 .…”

Section: Resultsmentioning

confidence: 99%

Cavitation and morphological changes in polypropylene deformed at elevated temperatures

Pawlak

Gałęski

2010

J Polym Sci B Polym Phys

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Section: Resultsmentioning

confidence: 99%

Cavitation and morphological changes in polypropylene deformed at elevated temperatures

Pawlak

Gałęski

2010

J Polym Sci B Polym Phys

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“…3,[15][16][17][18] Being composed of the interpenetrating networks built up by both crystalline lamellae and the entangled amorphous polymeric chains in between, semicrystalline polymers always exhibit a complex deformation behavior under tensile deformation. 1,[19][20][21][22][23] The behavior of the polymers during stretching is generally influenced by both the crystalline and the amorphous phases. 12,[24][25][26][27][28] The small-deformation properties are found to depend only on the nature of crystalline lamellae; whereas the ultimate properties are dominated by the entangled amorphous network.…”

Section: Introductionmentioning

confidence: 99%

Tensile Deformation of Oriented Poly(ε-caprolactone) and Its Miscible Blends with Poly(vinyl methyl ether)

Jiang

Wang

et al. 2013

Macromolecules

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The structural evolution of micro-molded poly(ε-caprolactone) (PCL) and its miscible blends with noncrystallizable poly(vinyl methyl ether) (PVME) at the nanoscale was investigated as a function of deformation ratio and blend composition using in situ synchrotron small-angle X-ray scattering (SAXS) and scanning SAXS techniques. It was found that the deformation mechanism of the oriented samples shows a general scheme for the process of tensile deformation: crystal block slips within the lamellae occur at small deformations followed by a stress-induced fragmentation and recrystallization process along the drawing direction at a critical strain where the average thickness of the crystalline lamellae remains essentially constant during stretching. The value of the critical strain depends on the amount of the amorphous component incorporated in the blends, which could be traced back to the lower modulus of the entangled amorphous phase and, therefore, the reduced network stress acting on the crystallites upon addition of PVME. When stretching beyond the critical strain the slippage of the fibrils (stacks of newly formed lamellae) past each other takes place resulting in a relaxation of stretched interlamellar amorphous chains. Because of deformation-induced introduction of the amorphous PVME into the interfibrillar regions in the highly oriented blends, the interactions between fibrils becomes stronger upon further deformation and thus impeding sliding of the fibrils to some extent leading finally to less contraction of the interlamellar amorphous layers compared to the pure PCL.3

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“…The plastic behaviour of this type of semi-crystalline material is primarily related to the deformation of the crystalline segments of the microstructure. Moderate plastic deformations are associated with dislocation motion within the crystallites, and further plastic deformation causes disruption of the crystalline segments [12][13][14][15][16][17].…”

Section: Discussionmentioning

confidence: 99%

Anisotropic Elastic-Viscoplastic Properties at Finite Strains of Injection-Moulded Low-Density Polyethylene

et al. 2017

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Injection-moulding is one of the most common manufacturing processes used for polymers. In many applications, the mechanical properties of the product is of great importance. Injection-moulding of thin-walled polymer products tends to leave the polymer structure in a state where the mechanical properties are anisotropic, due to alignment of polymer chains along the melt flow direction. The anisotropic elastic-viscoplastic properties of low-density polyethylene, that has undergone an injectionmoulding process, are therefore examined in the present work. Test specimens were punched out from injectionmoulded plates and tested in uniaxial tension. Three in-plane Blekinge Technical University, Karlskrona, Sweden material directions were investigated. Because of the small thickness of the plates, only the in-plane properties could be determined. Tensile tests with both monotonic and cyclic loading were performed, and the local strains on the surface of the test specimens were measured using image analysis. True stress vs. true strain diagrams were constructed, and the material response was evaluated using an elasticviscoplasticity law. The components of the anisotropic compliance matrix were determined together with the directionspecific plastic hardening parameters.

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Morphological alterations during texture-producing plastic plane strain compression of high-density polyethylene

Cited by 240 publications

References 7 publications

Cavitation and morphological changes in polypropylene deformed at elevated temperatures

Cavitation and morphological changes in polypropylene deformed at elevated temperatures

Tensile Deformation of Oriented Poly(ε-caprolactone) and Its Miscible Blends with Poly(vinyl methyl ether)

Anisotropic Elastic-Viscoplastic Properties at Finite Strains of Injection-Moulded Low-Density Polyethylene

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