Fasern und Filme aus isotaktischem Polypropylen. Herstellung und Eigenschaften unter Berücksichtigung ihrer kristallinen Textur

Compostella, M.; Coen, A.; Bertinotti, Floriana

doi:10.1002/ange.19620741605

Cited by 54 publications

(18 citation statements)

References 9 publications

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“…[1][2][3] The influence of spinning conditions, such as extrusion temperature, take-up velocity, or spin-line stress, as well as material characteristics (mainly, the molecular mass and the molecular mass distribution), has been reported extensively in the literature. [4][5][6][7][8][9] Fibres/tapes produced by high-speed melt spinning offer mechanical properties which are adequate for a number of commodity applications (e.g., textiles and carpets).…”

Section: Introductionmentioning

confidence: 99%

On the overdrawing of melt‐spun isotactic polypropylene tapes

Schimanski

Loos

Peijs

et al. 2006

J of Applied Polymer Sci

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The morphology and mechanical properties of melt-spun and post-drawn isotactic polypropylene (iPP) tapes have been studied in order to examine their dependence on the post-draw ratio applied. Special attention is focused on the characterization of the so-called overdrawing behavior of the tapes; at a certain draw ratio, a change of the optical appearance of the tape from transparent to opaque is observed. Overdrawing is accompanied with changes in the mechanical properties, surface, and morphology of the tapes. For postdraw ratios without overdrawing, and for highly overdrawn tapes, the variation in the mechanical properties measured is very small, but for slightly overdrawn tapes, a large scattering of mechanical properties has been measured. In the latter case, this behavior is related to the start of internal delamination of the tapes during post drawing. It is shown that strongly overdrawn tapes have excellent mechanical properties, in particular, high specific stiffness and strength.

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Section: Introductionmentioning

confidence: 99%

On the overdrawing of melt‐spun isotactic polypropylene tapes

Schimanski

Loos

Peijs

et al. 2006

J of Applied Polymer Sci

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“…It means that the oriented crystal lamellae form a network crosslinked through vertical lamellae. Such a crystal structure is well known as mother–daughter lamellae or a crosshatched structure . The isotropic circle also shows that some parts of the lamellae are randomly scattered in the matrix.…”

Section: Resultsmentioning

confidence: 96%

Dynamic mechanical behavior and nanostructure morphology of hyperbranched‐modified polypropylene blends

Sari

Stribeck²,

Moradian

et al. 2013

Polymer International

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“…It is thus related to long periods of domains arranged in the transverse direction. This feature is indicative for stacks of cross-hatched lamellae [22, 37, 42–46] in polypropylene. The corresponding domains are known to bridge the main lamellae.…”

Section: Resultsmentioning

confidence: 99%

Extruded blend films of poly(vinyl alcohol) and polyolefins: common and hard-elastic nanostructure evolution in the polyolefin during straining as monitored by SAXS

Stribeck

Zeinolebadi

Fakirov

et al. 2013

Science and Technology of Advanced Materials

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Straining of PVA/PE and PVA/PP blends (70:30) is monitored by small-angle x-ray scattering (SAXS). Sheet-extruded films with different predraw ratio are investigated. The discrete SAXS of predrawn samples originates from polyolefin nanofibrils inside of polyolefin microfibrils immersed in a PVA matrix. PE nanofibrils deform less than the macroscopic strain without volume change. PP nanofibrils experience macroscopic strain. They lengthen but their diameter does not decrease. This is explained by strain-induced crystallization of PP from an amorphous depletion shell around the core of the nanofibril. The undrawn PVA/PE film exhibits isotropic semicrystalline nanostructure. Undrawn PVA/PP holds PP droplets containing oriented stacks of semicrystalline PP like neat precursors of hard-elastic thermoplasts. Respective predrawn films are softer than the undrawn material, indicating conversion into the hard-elastic state. Embedding of the polyolefin significantly retards neck formation. The polyolefin microfibrils can easily be extracted from the water-soluble matrix.

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Fasern und Filme aus isotaktischem Polypropylen. Herstellung und Eigenschaften unter Berücksichtigung ihrer kristallinen Textur

Abstract: ISTITUTO RICERCHE POLYMER, TERN1 (ITALIEN)Die

Cited by 54 publications

References 9 publications

On the overdrawing of melt‐spun isotactic polypropylene tapes

On the overdrawing of melt‐spun isotactic polypropylene tapes

Dynamic mechanical behavior and nanostructure morphology of hyperbranched‐modified polypropylene blends

Extruded blend films of poly(vinyl alcohol) and polyolefins: common and hard-elastic nanostructure evolution in the polyolefin during straining as monitored by SAXS

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