Poly-Mono - Polymers Part 1 Monomer Chapter 13 Synthetic...

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Polymers – Part 1: Monomer Chapter 13
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Synthetic Polymers •A polymer is a substance composed of molecules with large molecular mass composed of repeating structural units, or monomers , connected by covalent chemical bonds •S y n t h e t i c Describing a substance that has been made artificially thru chemical synthesis; i.e., one that does not come from a natural source. • Synthetic Polymers Fiber (e.g., aramid (Nomex, Kevlar, nylon), polyester) Protective coating (e.g., varnish) Plastics (e.g., acrylics (plexiglass), PET (drink bottle)) Adhesives (e.g., cyanoacrylates (superglue)) Elastomers -rubber (e.g., styrene butadiene (SBR tires))
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How polymers are made? • Raw material: crude oil or natural gas Crude Oil 1 st step: fractional distillation Physical separation of crude oil into individual hydrocarbons (HCs) 2 nd step: cracking or reforming Further refining HCs to produce monomers 3 rd step: polymerization Chain monomers into polymers thru polymerization
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Most Common Hydrocarbons Alkanes (paraffins) – from crude oil – are hydrocarbons where all C-C bonds are single bonds (i.e. they are saturated compounds), with the general formula C n H 2n+2 Methane (CH 4 ), ethane (C 2 H 6 ), propane (C 3 H 8 ), butane (C 4 H 10 ) Alkenes (olefins) – man-made –a r e unsaturated hydrocarbons containing at least one carbon- to-carbon double bond , with the general formula C n H 2n Ethylene (C 2 H 4 ), propylene (C 3 H 6 ), butylene(C 4 H 8 ) Alkynes (acetylenes ) – man-made –a r e unsaturated hydrocarbons that have at least one carbon-to- carbon triple bond , with the general formula C n H 2n-2 – Acetylene (or Ethyne) (C
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This note was uploaded on 04/06/2008 for the course ENTC 206 taught by Professor Fang during the Spring '08 term at Texas A&M.

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Poly-Mono - Polymers Part 1 Monomer Chapter 13 Synthetic...

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