Man made.
Can be considered a pollutant as it decays very slowly in land fills.
It is fairly inert. Doesn't combine with other substances.
2007-01-01 13:43:14
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answer #1
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answered by Alan Turing 5
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Propylene is man-made, and it is made on purpose in 1-billion-lb-per-year plants along with ethylene. The purpose is polymerization into polypropylene plastic resin and oxidation to propylene oxide. Polypropylene is molded into plastic parts for appliances, auto parts, office equipment, sporting goods, and upholstery and carpet fiber. Propylene oxide is made into propylene glycol to be made into polyester for so-called fiberglass boats, shower stalls, construction panels, and car fenders. It does not create pollution, because it costs so much per pound that people try to keep and recover it. Propylene is a gas at room temperature, so one would find it hard to keep it in a landfill for it to spend a long time decaying. It is combinable with ethylene, a related compound, to make ethylene-propylene plastic resins.
2007-01-01 22:01:13
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answer #2
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answered by steve_geo1 7
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All the propylene used commercially is synthesised. But plenty of processes in nature produce simple alkenes like propylene. For instance, pip fruit like apples produce ethene (C2H4) as they ripen. If you expose apples and pears to artificially high levels of ethene you can ripen them more quickly. Propylene can probably be produced by bacterial action on biomass, although I couldn't give you any details. When you ferment sewage to make biogas, you produce a wide range of simple compounds like this. And crude oil and coal, both produced by natural processes, both contain a number of different hydrocarbons like propylene.
2007-01-01 21:48:19
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answer #3
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answered by zee_prime 6
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Propylene or POLYpropylene. One is just a compound while the other is a polymer or macromolecule. I'm thinking you meant the polymer.
Polypropylene does not degrade easily and is man-made. Many of the plastic containers (ziploc) you get at the grocery stores are polypropylene.
2007-01-01 21:50:32
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answer #4
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answered by Melissa Me 7
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It's not nature, if you want to have propylene you need a harsh situation (e.g very high temperature, presure and catalyst - Plantinium) .
I can cause polution
It combines with water, HX ( X is halogen element ), Halogen element, with another alkene, with Hydrogen... etc...
2007-01-01 21:48:18
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answer #5
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answered by giovabao 2
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Polypropylene is a synthetic plastic. It is composed of carbon and hydrogen atoms. They are in a long molecular chain. If you continue to melt polypor, eventually you will end up with paraffin. That's why polypro smells like candles when its melted.
2007-01-01 21:52:34
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answer #6
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answered by iraqisax 6
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man-made it takes forever to detiorate back to its original molecues
2007-01-01 21:46:44
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answer #7
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answered by oldmanarnie 4
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