Einfluß der Molekülmasse auf morphologie und mechanische Eigenschaften von Polyethylen

Fiedler, P.; Michler, G. H.; Braun, D.

doi:10.1002/actp.1986.010370415

Cited by 12 publications

(1 citation statement)

References 18 publications

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“…The morphology of LDPE -fractions with average M w < 2.10 4 comprises long lamellae (until 1 µm) with nearly parallel arrangement [44]. They are densely packed with thin amorphous regions in-between, thus approaching a nearly perfect nanolayered system.…”

Section: Critical Strainmentioning

confidence: 99%

Chevron morphology in deformed semicrystalline polymers

Krumova¹,

Henning²,

Michler³

2006

Philosophical Magazine

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International audienceChevron morphology was observed using transmission electron microscopy in various semicrystalline polymers deformed in tensile experiments. The morphological and mechanical prerequisites for chevron structure formation in semicrystalline polymers were revealed. It was demonstrated that chevron folding is a common deformation mode which can appear in real, i.e. globally unoriented or partially oriented samples, in areas where the lamellar stacks are oriented perpendicular to the deformation direction. Similarities with the behaviour of other layered systems were found. The mechanisms of chevron formation is discussed in the light of the fundamental statements of the folding theories and is related to the specific microstructure of the polymers. The effect of the boundary conditions, deformation temperature and macroscopic strain on the characteristics of the chevron structure is described

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Section: Critical Strainmentioning

confidence: 99%

Chevron morphology in deformed semicrystalline polymers

Krumova¹,

Henning²,

Michler³

2006

Philosophical Magazine

Self Cite

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Einfluß des Knäueldurchmessers auf die Morphologie und die mechanischen Eigenschaften von Polyethylen

Fiedler

Rätzsch²,

Braun

et al. 1987

Acta Polymerica

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Für teilkristalline Polymere wird am Beispiel von Fraktionen aus Polyethylenen niederer und hoher Dichte der Einfluß des Knäueldurchmessers auf die Langperiode und die Bildung von “tie”‐Molekülen diskutiert. Charakteristische Änderungen der Langperiode korrelieren mit starken Änderungen der Zugfestigkeit bzw. ‐dehnung. Bei der Darstellung dieser Strukturparameter als Funktion des Knäuelradius ergeben sich interessante Hinweise auf die Bildungswahrscheinlichkeit von “tie”‐Molekülen.

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Einfluß von molekularer Struktur und Morphologie auf die Spannungsrißbeständigkeit von Polyethylen

Fiedler¹,

Braun²,

Weber³

et al. 1988

Acta Polymerica

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Acta Polymerica 39 (1988) Nr. 9 481 poly(styrene). The fraction of "interfacial" poly(styrene) is nearly constant, and, therefore, the A(700 cm-l)/ A(1607 cm-l) ratio decreases by increasing t h e PS content because of the low value of this ratio ( M 3.2) obtained from "bulk" poly(styrene).Assuming the additivity of the absorbances of the "interfacial" and the "bulk" poly(styrene) characterized by the afore-mentioned ratios, it is possible t o calculate the A(700 cm-l)/A(1607 cm-l) ratios as a function of the polymer composition according t o LAMBERT-BEER'S law : =1(700 cm-l) el E2 1 ii(1607 cm-l) = (T c1 + T ") clf2' el, e2 and e3 are the coefficients of absorbance a t 700 cm-1 of the interfacial poly(styrene), a t 700 em-l of the pure bulk poly(styrene), and a t 1607 cm-l as the reference, respec-

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Einfluß der Molekülmasse auf morphologie und mechanische Eigenschaften von Polyethylen

Cited by 12 publications

References 18 publications

Chevron morphology in deformed semicrystalline polymers

Chevron morphology in deformed semicrystalline polymers

Einfluß des Knäueldurchmessers auf die Morphologie und die mechanischen Eigenschaften von Polyethylen

Einfluß von molekularer Struktur und Morphologie auf die Spannungsrißbeständigkeit von Polyethylen

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