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Topic: Polyethene

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	Polyethylene
		Polyethylene or polyethene is one of the simplest and most inexpensive polymers.
		Their are two main types of polyethene: high density poly(ethene) (HDPE) and low density poly(ethene) (LDPE).
		The most common household use of LDPE is in plastic bags[?]; the most common household use of HDPE is in containers for milk, liquid laundry detergent[?], etc.
	www.ebroadcast.com.au /lookup/encyclopedia/po/Polyethene.html (268 words)

	RSC - Infochem
		Polyethene is also used in bullet proof vests, in hip and bone replacements, and as a waterproof coating on skis, sail boards, and canoes.
		A polyethene tube, called Pluto, was also laid across the Channel for transferring petrol from the UK to France.
		In its simplest form polyethene consists of a long backbone of carbon atoms with two hydrogen atoms attached to each.
	www.rsc.org /Education/EiC/issues/2005_Jan/infochem.asp (1182 words)

	GoldenEssays - Chemistry - Free Essays, Free Research Papers, Free Term Papers, Free Cliff Notes, Essays, Free Book ...
		Polyethene is a polymer produced by reacting oxygen and ethene, in this reaction the small ethene molecules attach together to form long chain polymer molecules.
		Polyethene is a thermoplastic material which is often described as wax-like it is extremely tough and is has an excellent chemical resistance.
		Polyethene is used in millions of applications all around the world, due to the many different uses of this substance it is hardy unexpected.
	www.goldenessays.com /free_essays/1/chemistry/polyethene.shtml (1199 words)

	KCPC Education Resource Web Site: 9.2.1 History of Polymers
		Polyethene was first made in 1933 at ICI in England as part of a general study of how chemicals respond to pressure.
		Polyethene was produced commercially from 1939 as a substitute for gutta percha (poly-trans-isoprene) as an insulator for coaxial cables, and played a key role in wartime by enabling radar sets to be built small and light enough to be carried on aircraft.
		HDPE, a linear polyethene (the linear chains can pack together much more easily than branched ones to give a denser, more crystalline material) was produced independently by DuPont and the U.S. Rubber Company during the war, but was not commericalised.
	www.kcpc.usyd.edu.au /discovery/9.2.1/9.2.1_History2.html (324 words)

	KCPC Education Resource Web Site: 9.2.1 Polyethene as a Polymer
		Low Density Polyethene (LDPE) was the first polymer of ethylene to be made.
		Linear Low Density Polyethene (LLDPE) is a polymer made by copolymerisation with other alkenes using Ziegler-Natta catalysts that only has very short branches, so though it is low density it has better mechanical properties than LDPE.
		The melt strength branching index is a method used in industrial laboratories to gauge how branched a polyethene is - the more long chain branches are present, the harder it is for the molecules to flow past each other, and the more stress a molten strand of the polymer can take.
	www.kcpc.usyd.edu.au /discovery/9.2.1/9.2.1_Polyethene2.html (446 words)

	elecuter Scinet: Chemistry Revision
		Polyethene and pvc are examples of A-A polymers.
		Polyethene is not so springy and when it is deformed it tends to stay out of shape, undergoing permanent or plastic deformation.
		In polyethene the much weaker instantaneous dipole-induced dipole attractions are only present, hence polythene is a much weaker polymer.
	www.elecuter.co.uk /Scinet/chemistry/pr/index.php (1268 words)

	Moisture-absorption sheet - Patent 6800350
		A moisture-absorption sheet as claim in claim 1, wherein the polymer is selected from the group of polyethene, polypropene, polystyrene, polyethene oxide, polypropene oxide, polyacrylate, polycarbonate, polymethylmethacrylate and copolymers thereof.
		A method of manufacturing a moisture-absorption sheet as claimed in claim 1, characterized in that the particles of a moisture absorbing substance are mixed together with organic polymer particles, and subsequently rolled at a temperature around the glass transition temperature of the polymer.
		This polyolefin compound may additionally be composed of a mixture of a first polyolefin, such as polyethene, having a high molecular weight, and a second polyolefin having a low molecular weight.
	www.freepatentsonline.com /6800350.html (3150 words)

	► who made polyethene
		Polyethene can be used as wax in polish.
		A model for bipolar charge transport, trapping and recombination in degassed crosslinked polyethene A model for bipolar charge transport, trapping and recombination in degassed crosslinked polyethene Measurements of the space charge density...
		Shell made of polyethene HD, with aeration holes and attachments to fix a headlamp...
	www.faq-site.com /faqs/212/who-made-polyethene.html (358 words)

	Experiments with LC circuits
		I found that the used nylon screws gave some dielectric losses which reduces circuit Q. Now I use instead a polyethene block which supports the stator from the underside.
		The plastic insulation blocks of tuning capacitor C2 are replaced by polyethene blocks (which are the green blocks on the next picture).
		Now I have drilled a lot of 2 mm holes in the polyethene insulation blocks of tuning capacitor C2a.
	www.crystal-radio.eu /enlctest4.htm (359 words)

	Waste Management at Kigalamizi Report
		We walked through it and noted the grave problem of polyethene litter which is greatly threatening the soil drainage, aeration and fertility.
		Cows, pigs and goats can accidentally eat the polyethene and die.
		Polyethene too, encourages water stagnation which encourages breeding of mosquitoes.
	www.angelfire.com /mn/namagunga/kigalmz.html (714 words)

	[No title] (Site not responding. Last check: 2007-10-03)
		addition and condensation - the former are made from the simple addition of monomers, e.g., polyethene from the addition of ethene, the latter are usually synthesized from two different monomers with the elimination of biproduct, e.g., nylon 6-6 from hexandioyl chloride and 1,6-diaminohexane with elimination of HCl.
		The inter-chain hydrogen bonding is much stronger than van der Waals attractions in polyethene so cotton is a much tougher material than polyethene and can form strong fibres which can be formed into threads, which cannot be done for polyethene.
		Polyethene does not form strong fibres and cannot be woven into threads.
	heberge.univ-tlemcen.dz /~aourag/cours_polymers.doc (6514 words)

	Materials Polyethene
		Are available in volume weights of 25-200 kg/m³ in a various number of colours and qaulities, depending on preferred using range (for example antistatic, conductive and flame retardant).
		Polyethene may be split, die cut, laminated with PSA, water cut, warm cut, glued and sprayed with PU-film etc.
		Polyethene is being produced in an environmentally friendly process with no CFC and HCFC.
	www.b-akesson.se /en_26_30 (94 words)

	Wikinfo \| Polymerization
		The first genuinely man-made polymer, bakelite, was synthesized in 1872, however research into polymers and polymerization really accelerated in the 1930s after the serendipitous discovery of polyethene by the chemical company ICI.
		Addition polymerization is involved in the manufacture of polymers such as polyethene, polypropylene and polyvinylchloride (PVC.) A special case of addition polymerization leads to living polymerization.
		1), its double bond is broken and it is used to bond to another poly(ethene) monomer.
	www.wikinfo.org /wiki.php?title=polymerization (1140 words)

	CIEC Catalysis -- Polyethene
		By 1930 low molecular mass poly(ethene) could be made on lithium alkyls.
		They gave a solid poly(ethene) with high molecular mass.
		Ziegler concentrated on poly(ethene), but was in contact with Natta who worked on poly(propene).
	www.catalysis-ed.org /polyethene/poly2.htm (296 words)

	Polymer - Questionz.net , answers to all your questions (Site not responding. Last check: 2007-10-03)
		For example, the formation of polyethene involves thousands of ethene molecules bonding together to form a chain of repeating -CH2- units.
		Because polymers are distinguished by their constituent monomers, polymer chains within a substance are often not of equal length.
		Van der Waals forces are quite weak, however, so polyethene melts at low temperatures.
	www.questionz.net /Chemistry/Polymer.html (1121 words)

	Chemistry - Plastics
		Many ethene molecules join to form polyethene in plastic bags.
		Condensation Polymerisation occurs when two types of monomers join to form a long - chain polymer and water is given off (e.g.
		Common examples are polyethene in plastic bags, nylon, polyvinyl chloride (PVC), perspex and polystyrene.
	qldscienceteachers.tripod.com /junior/chem/plastics.html (364 words)

	Degrading Plastics To Reduce Waste
		Plastic bags that degrade in as little as 55 days after use can now be made using the first 100% degradable polyethene.
		The material has exactly the same mechanical properties as traditional polyethene but decomposes in a maximum of five years, compared to 100 years.
		SPI-TEK, produced by Symphony Environmental, contains up to 3% of a non-toxic Degradable Compostable Plastic (DCP) additives that acts as a catalyst to cause the carbon bonds in the polyethene to be broken.
	www.eurekalert.org /pub_releases/1999-03/IoM-DPTR-020399.php (266 words)

	Nomenclature
		This is done by adding the prefix poly- to the name of the alkene.
		Ethene is polymerized into polyethene (that's what the British call it).
		Since ethene can also be called ethylene, the polymer is also called polyethylene (that's what Americans call it).
	dl.clackamas.cc.or.us /ch106-02/nomencla1.htm (263 words)

	Talk:Polyethylene - Wikipedia, the free encyclopedia
		Polythene is Polyethylene, but the title of the article is polyethene.
		Seems so - if you search for "polyethene" on xrefer, it comes up with a stack of results saying that "polyethene" "polyethylene" and "polythene" are all the same thing.
		The correct IUPAC name is polyethene and this ought to be the name of the article with polyethylene redirecting to this one.
	en.wikipedia.org /wiki/Talk:Polyethylene (1941 words)

	Recycling Plastics
		PET, HDPE, LDPE and PVC form the bulk of the plastic packaging recovered by REPAK Limited, the approved packaging recovery organisation in Ireland.
		Most of the large-volume containers for soft drinks and some alcoholic drinks are made from a substance called PET (polyethene terephthalate - see symbol).
		It is estimated that over 70 Million PET bottles are sold every year in Ireland and improper disposal of even a small proportion makes a significant contribution to environmental litter.
	www.enfo.ie /leaflets/as28.htm (1699 words)

	Polyethene - Compare Prices, Reviews and Buy at NexTag - Price - Review
		Polyethene - Compare Prices, Reviews and Buy at NexTag - Price - Review
		PRIMELITE Garden/Outdoor Post Lighting: Street Light Polyethene 26 x 13 Inc
		The baitwells are molded from UV stabilized heavy-duty polyethene with thick walls for added strength.
	www.nextag.com /polyethene/search-html (140 words)

	EuroPlex International - National Distributors of Quality Hardwood Flooring Products.
		The two-ply polyethene film in TUPLEX provides a highly effective, double moisture barrier, so no separate moisture barrier is required.
		A test report is available from the manufacturer.
		TUPLEX is comprised of two layers of solid polyethene with flexible polystyrene granules between the layers.
	www.europlex.ca /Tuplex.htm (239 words)

	A model for bipolar charge transport, trapping and recombination in degassed crosslinked polyethene
		Measurements of the space charge density across the width of a plane parallel sample of degassed crosslinked polyethene (XLPE) have been made recently.
		Repeated at intervals throughout a period of applied high voltage, these measurements provide data on the dynamics of charge injection and space charge development in the sample under the influence of a stepped high DC voltage.
		In particular, reselling and systematic downloading of files is prohibited.
	stacks.iop.org /0022-3727/27/1291 (274 words)

	ULTA.com - The Ultimate Beauty Site : Eye Candy Eyeshadow
		A super-soft powder eyeshadow that glides across skin for a perfectly blended look.
		Licorice ingredients: Talc, Polyethene, Polyethylene Terephthalate, Acrylates Copolymer, Zinc Stearate, Tricaprylin, Tocopherol, Disodium EDTA, Methylparaben, Propylparaben, Ascorbyl Palmitate.
		Other shades ingredients: Talc, Polyethene, Zinc Stearate, Tricaprylin, Tocopherol, Disodium EDTA, Methylparaben, Propylparaben, Butylparaben, Ascorbyl Palmitate.
	www.ulta.com /control/product/~product_id=2102855 (162 words)

	STIGA Snow Racer by BOSSBi.com
		The stopper means that it turns and stops of its own accord if you fall off.
		GT w/ cushion / HD Polyethene / Black
		Plastic Toboggans / Snow Runner - A smart sled whose shape alone exudes speed and verve.
	www.bossbi.com /bike/stiga/stiga.php (597 words)

	ask4plastic HMHDPE Polyethene Film On Rolls United Kingdom
		ask4plastic HMHDPE Polyethene Film On Rolls United Kingdom
		We are looking for HMHDPE Polyethene films on rolls.
		Thickness 10 Microns prefered but can be bit more.
	www.ask4plastic.com /viewpost.asp?auto=648 (55 words)

	Alibaba.com: PE Polyethene Heating Constriction Film Blowing Machine Set (Hongqi Plastic & Packing Machinery Co., ...
		PE Polyethene Heating Constriction Film Blowing Machine Set
		See the most recent posting for this PE Polyethene Heating Constriction Film Blowing Machine Set (Dec 16, 2006)
		Copyright Notice © 1999-2006 Alibaba.com Corporation and its licensors.
	hongqi.en.alibaba.com /product/50022797/50114432/Film_Blowing_Machine_Sets/PE_Polyethene_Heating_Constriction_Film_Blowing_Machine_Set.html (218 words)

	Nets from Palos Sports - Soccer,physical education equipment, physical education resources, team sports equipment, ...
		Medium weight 3.0 mm orange twisted 5" square polyethene net.
		Super heavy braided 6.0 mm 5" square orange net.
		Heavy 4.0 mm twisted 5" square polyethene net.
	www.palossports.com /store/prodpage3.cfm/CategoryID/53/SubCatID/85 (92 words)

	Drum Taps, Brass Drum Tap, Polyethene Drum Tap at Toolfast
		Drum Taps, Brass Drum Tap, Polyethene Drum Tap at Toolfast
		Toolfast Direct — the UK’s Leading Supplier of
		Brass Lockable Drum Taps and Polyethylene Jumbo Drum taps precision manufactured to offer long working life and maintenance free service.
	www.toolfastdirect.co.uk /acatalog/Wesco_Drum_Taps.html (138 words)

	POLYETHENE BAG: Brother Spare Parts (Site not responding. Last check: 2007-10-03)
		> BROTHER PRINTER SPARE PARTS > BROTHER HL-2400CE PRINTER SPARE PARTS > PACKING MATERIALS > POLYETHENE BAG
		Please do not attempt to purchase any products with a zero value.
		Brother Spare Parts is a division of Impulse Group Limited - All trademarks acknowledged
	www.brother-spare-parts.co.uk /page/Brother_Spare_Parts/PROD/UH2172001 (60 words)

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