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polyolefins |
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polyolefins (pŏl'ēōl`əfən), group of plastics plastic, any organic material with the ability to flow into a desired shape when heat and pressure are applied to it and to retain the shape when they are withdrawn.
..... Click the link for more information. that are polymers polymer , chemical compound with high molecular weight consisting of a number of structural units linked together by covalent bonds (see chemical bond). The simple molecules that may become structural units are themselves called monomers; two monomers combine to form ..... Click the link for more information. of various alkenes alkene , any of a group of aliphatic hydrocarbons whose molecules contain one or more carbon-carbon double bonds (see chemical bond). Alkenes with only one double bond have the general formula CnH2n. ..... Click the link for more information. , or olefins. The most important are polyethylene polyethylene , widely used plastic. It is a polymer of ethylene, CH2=CH2, having the formula (-CH2-CH2-)n ..... Click the link for more information. and polypropylene polypropylene , plastic noted for its light weight, being less dense than water; it is a polymer of propylene. It resists moisture, oils, and solvents. Since its melting point is 121°C; (250°F;), it is used in the manufacture of objects that are sterilized in ..... Click the link for more information. . Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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