Polyethylene
“Polyethylene is a thermoplastic polymer consisting of long chains produced by combing the ingredient monomer ethylene (IUPAC name ethene), the name comes from the ingredient and not the actual chemical resulting. The ethylene actually converts to ethane as it takes its place in a polymer and straight sections of the polymer are the same structure as the simple chain hydrocarbons eg propane,decane and other straight single bonded carbon chains. As with any polymer, the structure of the resulting substance defies molecular description due to cross branching of the chains. The recommended scientific name polyethene is systematically derived from the scientific name of the monomer. In certain circumstances it is useful to use a structure-based nomenclature; in such cases IUPAC recommends poly(methylene) (poly(methanediyl) is an non-preferred alternative). The difference in names between the two systems is due to the opening up of the monomer's double bond upon polymerization.”
“The name is abbreviated to PE in a manner similar to that by which other polymers like polypropylene and polystyrene are shortened to PP and PS respectively. In the United Kingdom the polymer is commonly called polythene, although this is not recognized scientifically.”
“The ethene molecule (known almost universally by its common name ethylene) C2H4 is CH2=CH2.”
(Wikipedia, Polyethylene, 1/19/2011)
Biodegradation of Polyethylene Film
Crosslinked Polyethylene
EPDM
Gel Spinning Polyethylene
High Density Polyethylene (HDPE)
Linear Low Density Polyethylene (LLDPE)
Low Density Polyethylene (LDPE)
Polyethylene Copolymers
Polyethylene Crystallization
Polyethylene Entanglements
Polyethylene Film
Polyethylene Functionalization by Click Reactions
Polyethylene grafted with Maleic Anhydride (PEgMAH) Compatibilizers
Polyethylene Nanocomposites
Polyethylene Pyrolysis
Polyethylene Recycling
Polymers /Resins
Polyolefins
Ultrahigh Molecular Weight Polyethylene (UHMWPE)
Recent US Patents
12/21/2010
7,855,255
Preparation of multimodal polyethylene
Chandrashekar et al of Equistar Chemicals, Texas, produced multimodal polyethylene by polymerizing, in the presence of two or more single-site catalysts, ethylene or its mixture with a C.sub.3-C.sub.10 .alpha.-olefin to form a first multimodal resin and continuing the polymerization in the presence of the same catalysts but in a different hydrogen concentration, in a different monomer composition, or at a different temperature to form a second multimodal resin. (RDC 6/20/2011)