CHE134 Summer Lecture 9

CHE134 Summer Lecture 9 - I DEN TI FI CATI ON OF I DEN TI...

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Unformatted text preview: I DEN TI FI CATI ON OF I DEN TI FI CATI ON OF PLASTI CS PLASTI CS P E T E P S P P P V C L D P E H D P E H H H H H H H Cl Cl Cl Cl H Cl H H H H H H H H H O O O O O O O O O O OH O HO CH 3 CH 3 CH 3 CH 3 H H H H H H H H H H 654321 Objectives: To examine chemical and physical pr oper ties pr oper ties of some plastics; to identify an unknown on the basis of the result. I R of plastic films. Concepts: Density Characteristic I R vibrations Polymers Cross-linking Techniques: Melting Point Beilstein Test Density Determination Copper Equipment: Melting Point Apparatus I R Spectrometer Wire Chemists create variety of new polymeric materials with combinations of properties that are desirable (by human standards) PLASTIC is normally defined as: - PLASTICS CHEMISTRY A Material Science a carbon containing polymer that can be formed into a desired, persistent shape. Plastics are always polymers, but not all polymers are plastics e.g., silly putty, gelatin, asbestos. show a wide range of useful properties Polymer s Polymer s vs vs Plastics Plastics diamond , gr aphite , quar tz,mica , asbestos, cellulose, silk, etc. r ubber , N atur al polymers, e.g. N CH C N CH 2 C CH 3 O H H O n nanotubes, Car bon based SiO 2 based The monomers from which all polymers are synthesized contain carbon 2. False You were shown a series of polymers that did not contain carbon, e.g. silicate minerals. All plastics contain carbon , but not all polymers are plastics The monomers from which all plastics in this exer cise are synthesized are derivatives of C 2 H 4 H 2 C CH 2 ETH YLEN E . C C H H Ethylene Based Monomers Ethylene Based Monomers C H H C H C H H C Cl C H H C C N C H H C O O C CH 3 C H H C C H H C 3 C O CH 3 C H H C C C H H H C F F C F Ethylene Vinyl Chloride Acrylonitrile Vinyl Acetate Styrene Methyl Methacrylate Tetrafluoro Ethylene 1,3 Butadiene poly poly poly poly poly poly Teflon PVC Lucite PAN poly PS Polymers - Polymers - Plastics Plastics HDPE LDPE PVA Rubber poly PROPERTI ES PROPERTI ES What pr oper ties char acter ize plastics?...
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This note was uploaded on 01/09/2011 for the course CHE 134 taught by Professor Staff during the Summer '08 term at SUNY Stony Brook.

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CHE134 Summer Lecture 9 - I DEN TI FI CATI ON OF I DEN TI...

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