Polyethylene: Polymer with Future

Böhm, Ludwig; Berthold, J.; Enderle, H.-F.; Fleißner, M.

doi:10.1007/978-3-642-60178-1_1

Cited by 13 publications

(6 citation statements)

References 12 publications

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“…Generally speaking, resistance to SCG improves with increasing molecular weight and with decreasing crystallinity (or density). Further, many investigators have pointed out that short chain branches (from suitable comonomers) along the longest molecules of the molecular weight distribution is an especially effective manner to enhance resistance to SCG [16,[19][20][21][22][23][24][25][26][27][28][29]. These observations point to the critical role exerted by the inter-lamellar tie-molecules on the SCG resistance of HDPE.…”

Section: Introductionmentioning

confidence: 95%

Analysis of ductile and brittle failures from creep rupture testing of high-density polyethylene (HDPE) pipes

Krishnaswamy

2005

Polymer

121

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Section: Introductionmentioning

confidence: 95%

Analysis of ductile and brittle failures from creep rupture testing of high-density polyethylene (HDPE) pipes

Krishnaswamy

2005

Polymer

121

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“…Die Folien haben deutlich verbesserte Zähigkeitswerte, sodass für die gleiche Anwendung dünnere Folien eingesetzt werden können und die gleiche Gebrauchstüchtigkeit mit deutlich weniger Material erreicht wird (Tabelle 4). 79…”

Section: Maßgeschneiderte Polyethylene Hoher Dichteunclassified

Die Ethylenpolymerisation mit Ziegler‐Katalysatoren 50 Jahre nach der Entdeckung

Böhm¹

2003

Angewandte Chemie

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Vor einem halben Jahrhundert entdeckten Karl Ziegler und Mitarbeiter die Synthese von Polyethylenen bei niedrigen Drücken und mäßig hohen Temperaturen mit Übergangsmetallkatalysatoren der 4. Nebengruppe und aluminiumorganischen Verbindungen als Cokatalysatoren. Die 50 Jahre bis heute sind eine Innovationsgeschichte in Wissenschaft und Industrie, der Entwicklung hochaktiver Katalysatoren und eines großtechnischen Prozesses auf der Grundlage eines detaillierten Verständnisses aller relevanter chemischer und physikalischer Vorgänge auf allen Größenskalen. Katalysatoren, Verfahren und Produkte werden auch heute ständig weiterentwickelt, Zeichen dafür, dass das Potenzial dieses Polymerisationsprozesses noch nicht vollständig ausgeschöpft ist. Ziel dieser Forschungs‐ und Entwicklungsarbeiten ist, noch bessere Eigenschaftskombinationen der Produkte bei noch geringeren Herstellkosten zu erreichen und andere Werkstoffe wie Glas, Papier, Stahl, Beton in bestimmten Anwendungen zu ersetzen, da Polyethylene im Hinblick auf Ressourcenschonung die besseren Problemlösungen erbringen.

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“…In other cases, broadening has been achieved by providing two distinctly different chemical environments for the titanium (66), or in the process by passing the Ziegler catalyst through two or more reaction zones (67).…”

Section: Oxidizedmentioning

confidence: 99%

“…Bimodal Reactor Technology. In a modification of the original stirred tank slurry process, Hoechst, Nissan, Mitsui, and others developed cascade reactor systems to make bimodal resins with improved properties (67,117,118). Under these processes, multiple reactors are aligned in series, parallel, or a combination of series and parallel, so that a Ziegler catalyst is exposed to more than one set of reaction conditions during its lifetime.…”

Section: Manufacturing Processesmentioning

confidence: 99%

“…In some cases, broadening has been achieved by using vanadium, zirconium, or other metal halides in the recipe, either alone or in combination with titanium (63)(64)(65). In other cases, broadening has been achieved by providing two distinctly different chemical environments for the titanium (66), or in the process by passing the Ziegler catalyst through two or more reaction zones (67).…”

Section: Oxidizedmentioning

confidence: 99%

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Ethylene Polymers,HDPE

Benham

McDaniel

2001

Encyclopedia of Polymer Science and Technology

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History of PEEarly Work. The history of HDPE (and polyolefins in general) actually began in the 1890s with the synthesis of "polymethylene" from the decomposition of diazomethane. Between 1897 and 1938, numerous reports of such polymers appeared in the literature (1-6). Catalysts such as unglazed china, amorphous boron, and boric acid esters were used for the decomposition. The empirical formula of such products was found to be CH 2 . Later reproductions of work (3,6) established Encyclopedia of Polymer Science and Technology.

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Polyethylene: Polymer with Future

Cited by 13 publications

References 12 publications

Analysis of ductile and brittle failures from creep rupture testing of high-density polyethylene (HDPE) pipes

Analysis of ductile and brittle failures from creep rupture testing of high-density polyethylene (HDPE) pipes

Die Ethylenpolymerisation mit Ziegler‐Katalysatoren 50 Jahre nach der Entdeckung

Ethylene Polymers,HDPE

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