what is poly ethylen?
460719
it's a material used in production of the isolation plastic materials for home use. it's kinda related to the plactis, or PVC.\n\nsee this:\nhttp://dictionary.reference.com/search?q=Polyethylene
779146
Check this link... Has good info...:\n\nhttp://en.wikipedia.org/wiki/Plastic
515270
Polybutylene terephthalate (PBT) is a plastic that is used as an insulator in the electrical and electronics industries. It is a thermoplastic crystalline polymer, and a type of polyester. PBT is resistant to solvents, shrinks very little during forming, is mechanically strong, heat-resistant up to 150°C (or 200°C with glass-fibre reinforcement) and can be treated with flame retardants to make it noncombustible.
766132
Polymer is "poly"-"mer", which means "many units".\n\nThus a polymer is a molecule made from a bunch of smaller building block molecules.\n\nA fat is typically made of glycerol + 3 fatty acids.  Basically, it has 4 building blocks.  "4" isn't a big enough number to consider it to be many, especially compared to proteins.\n\nProteins are made of a set of ~20 different kinds amino acids in a long, specific sequence.  For example, one part of the hemoglobin protein has ~100's of amino acid units in it.  This puts the "many" in "poly".
180723
Yes, all of these are polymers.  While appearing to be different, they are all long chain molecules or polymers.  They all fit into the subset linear polymers, or chain molecules that have no branching points.
693705
Usually it's poly-ethylene glycol.  It's just a big organic molecule that has some polarity.  It also ususually a coloring agent in it.  There are various brands that add other things, but this is the basic composition.
695413
Polyethylene (PE) comes in low density, high density and ultahigh molecular weight (UHMW) versions.  The molecule is just a straight chain hydrocarbon so it can be of any length.  Milk jugs are low density PE.  Its soft and not very tough.  As the molecules get longer, they tangle together more making UHMW very tough and wear resustance.  By ultrahigh, UHMW PE has a molecular weight in the millions.
732587
There are all kinds of different materials lumped under the generic heading of "plastics".  The variations run into hundreds, perhaps even thousands of compounds!\n\nFor example, there's nylon.  The most familiar form, nylon 66, is a copolymer of adipic acid or adipoyl chloride and hexamethylene diamine.  But I can substitue various hydrocarbon chains in those two components to make nylon 55, nylon 65, nylon 48, nylon 83, etc.\n\nThen there are the families of polyaramid polymers, and polyester polymers, and polycarbonates, and . . . .\n\nNobody will ever be able to give you an exhaustive list here.  Try looking up some books on polymer chemistry at your library.
387969
present invention provides a method for producing an ethylene-vinyl acetate copolymer (EVA) containing 5 mol % to 60 mol % of ethylene, by copolymerizing ethylene and vinyl acetate with a polymerization initiator, in which an aliphatic alcohol having not more than four carbon atoms is used as the polymerization solvent, the contents of acetaldehyde and a saturated acetic ester with respect to vinyl acetate are not more than 200 ppm, and 10 ppm to 1500 ppm, respectively, and polymerization is carried out at a temperature of 30° C. to 150° C. EVA obtained by the foregoing method may be saponified to obtain a saponified ethylene-vinyl acetate copolymer (EVOH). According to the present invention, at least one of (i) improved melt-extrusion stability, (ii) improved melt-moldability, (iii) reduced discoloration, and (iv) reduced gelation is achieved.
1177344
I believe rubber is the actual product, natural, derived off of trees, plastic is petroleum based and/or manufactured.
739002
It would be an insulator because it creates a generally air filled barrier between two objects. I do not believe it's flame retardant. Polyethylene melts easily. Polypropylene has a higher melting point and is usually used in those disposable food storage containers.
90544
polymere's and resins
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Teflon is a carbon-based organic molecular polymer (also known as a plastic).  Silicon is an element- silicon and carbon are similar in many charactaristics.  You may be asking about silicone, which is a polymer consisting of the element silicon and others.  Teflon is a very stable, low friction, high melting point plastic.  Silicone is a non=newtonian fluid used for lubrication.
1140608
Polymers are substances whose molecules have high molar masses and are composed of a large number of repeating units. There are both naturally occurring and synthetic polymers. Among naturally occurring polymers are proteins, starches, cellulose, and latex. Synthetic polymers are produced commercially on a very large scale and have a wide range of properties and uses. The materials commonly called plastics are all synthetic polymers. \n\n  \n\n             Polymers are formed by chemical reactions in which a large number of molecules called monomers are joined sequentially, forming a chain. In many polymers, only one monomer is used. In others, two or three different monomers may be combined. Polymers are classified by the characteristics of the reactions by which they are formed. If all atoms in the monomers are incorporated into the polymer, the polymer is called an addition polymer. If some of the atoms of the monomers are released into small molecules, such as water, the polymer is called a condensation polymer. Most addition polymers are made from monomers containing a double bond between carbon atoms. Such monomers are called olefins, and most commercial addition polymers are polyolefins. Condensation polymers are made from monomers that have two different groups of atoms which can join together to form, for example, ester or amide links. Polyesters are an important class of commercial polymers, as are polyamides (nylon).
47770
Here is a link to a "Polymer Physical Property Comparison Chart."\nhttp://www.lauren.com/Technical_Info/physical_properties.asp
998443
PET, also known as PolyEthylene Terephthalate, is a thermoset plastic resin. What that means is that it can not be reused in making molded plastic products. Thermoset molecules crosslink with each other during processing. Once this is done it can not be undone. However, thermoplastic plastic resins are capable of being ground up and remolded. Those materials do not crosslink and can be reused over and over again, to a certain point. Examples of thermoplastic resins are PP, PS, PE, etc.
41828
A thermoplastic is a material that is plastic or deformable, melts to a liquid when heated, and freezes to a brittle, glassy state when cooled sufficiently. Most thermoplastics are high molecular weight polymers whose chains associate through weak van der Waals forces (polyethylene); stronger dipole-dipole interactions and hydrogen bonding (nylon); or even stacking of aromatic rings (polystyrene). Thermoplastic polymers are contrasted with thermosetting polymers (Bakelite; vulcanized rubber), which, once formed and cured, can never be remelted and remolded. Many thermoplastic materials are addition polymers; e.g., vinyl chain-growth polymers, such as polyethylene and polypropylene.