Results 1 to 10 of about 1,444 (255)

Dissymmetric dinuclear transition metal complexes as dual site catalysts for the polymerization of ethylene [PDF]

Polyolefins Journal, 2014
A series of dissymmetric dinuclear complexes were synthesized, as dual site catalysts in ethylene polymerization, by coupling the allylated a-diimine complexes of the metals Ti, Zr, V, Ni and Pd with the ansa-zirconocene complex [C5H4-SiH(Me)-C5H4]ZrCl2 ...
Haif Alshammari, Helmut G. Alt
doaj   +1 more source

Reverse Engineering of Chemically Similar Bimodal High Density Polyethylenes: A Comprehensive Study Using Advanced Chromatographic Techniques

Macromolecular Materials and Engineering, 2022
Bimodal high‐density polyethylene (bHDPE) is a complex, multicomponent polyethylene (PE) material whose synthesis in a multistage process can be challenging.
Anthony Ndiripo, Helen Lamola, Petronella Zabesuthu Ndlovu, Albena Lederer, Harald Pasch, Albert Johannes van Reenen   +5 more
doaj   +1 more source

Caracterização de polietilenos lineares de baixa densidade I.: determinação do teor de ramificação por métodos espectroscópicos Linear low density polyethylene characterization - I.: spectroscopic methods for comonomer content determination

Polímeros, 2005
Os polietilenos lineares de baixa densidade (LLDPE) apresentam propriedades variando amplamente em função da concentração e do tipo de comonômero utilizado na copolimerização, além do tipo de catalisador.
Antonio C. Quental, Lilian S. Hanamoto, Maria I. Felisberti   +2 more
doaj   +1 more source

Predicting LDPE/HDPE blend composition by CARS-PLS regression and confocal Raman spectroscopy

Polímeros, 2019
Industries and the scientific community currently focus on creating new ways to recycle and to reuse polymer waste that leads to serious socio-environmental risks.
Daniel José da Silva, Hélio Wiebeck
doaj   +1 more source

Preparation of Biodegradable Low Density Polyethylene by Starch – Urea Composition for Agricultural Applications [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2004
It has been proven that polyolefins specially low density polyethylene (LDPE), are resistant against degradation and microorganism attacks; Thus, one of the most important properties of industrial plastics, is their environmental biodegradability.
Mahmood Torabi Angaji, Hamid Reza Hagheeghatpadjooh   +1 more
doaj  

A New Route for Evaluating Short Chain Branching Distribution of High Density Polyethylene by Measuring Crystallizability of Molar Mass Fractions

Medžiagotyra, 2011
A bimodal high density polyethylene (HDPE) has been successfully fractionated by analytical size exclusion chromatography into molar mass fractions with Mw's ranging from 3.6 kg/mol to 8 000 kg/mol, and subsequently deposited on germanium ...
Andres KRUMME, Monika BASIURA, Thijs PIJPERS, Geert VANDEN POEL, Lars Christian HEINZ, Robert BRÜLL, Vincent B. F. MATHOT   +6 more
doaj   +1 more source

Influence de délai de durcissement sur le comportement des rejets acclimatés de plan-tain (Musa AAB) ex situ à Gbadolite en République Démocratique du Congo

Revue Africaine d'Ethnobiologie et Ethnomédecine
La présente étude a pour objet celui de tester l’influence de délai de de durcissement sur le comportement des rejets acclimatés de plantain (Musa AAB) ex situ à Gbadolite en République Démocratique du Congo.
Médard MOLONGO MOKONDANDE, Gaëtan ABUBA VANA, Junior AMBWA LOKULA, Pierre BIGENDODE YEGELE, Jireh NGBUTA KENGA, Médard SONGBO KWEDUGBU   +5 more
doaj   +1 more source

Tensile mechanical response of polyethylene – clay nanocomposites.

eXPRESS Polymer Letters, 2007
In this work we report on the microstructural and the mechanical characteristics of high density polyethylene (HDPE)-clay nanocomposites, with particular attention to the creep behaviour. The samples were prepared through melt compounding, using two high-
doaj   +1 more source

Decomposition of oxo-biodegradable polyethylenes by a combination of oxidation and biodegradation

e-Polymers
The ambiguity of the effect of applying pro-oxidant additives to polyolefins aroused interest in its actual biodegradability. A sample of a commercial package with pro-oxidant additive, a sample of pure low-density polyethylene (LDPE) and a sample of ...
Mastalygina Elena Evgenyevna, Pantyukhov Petr Vasilievich, Ovchinnikov Vasily Andreevich, Poletto Matheus, Popov Anatoly Anatolievich   +4 more
doaj   +1 more source

Functionalization of LDPE and mLLDPE via grafting trans-ethylene-1,2-dicarboxylic acid by reactive extrusion

eXPRESS Polymer Letters, 2010
An investigation was made of grafting trans-ethylene-1,2-dicarboxylic acid (TEDA) onto metallocene-linear low-density polyethylene (mLLDPE) and low-density polyethylene (LDPE) in the course of reactive extrusion.
doaj   +1 more source