ch14&15 - . Plastics in Everyday Applications ....

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: . Plastics in Everyday Applications . Plastics in Everyday Applications PS : Polystyrene. amorphous structure it is glass-clear, hard, brittle, and dimensionally stable a disadvantage is its low thermal stability Polystyrene Micro plates Clean sheets Polystyrene bowls PE-LD : Low Density Polyethylene. very good flexibility, good general chemical resistance temperature of use is limited to about 80 C. LDPE bottles LDPE tubing collapsible Cubitainer PE-HD: High Density Polyethylene. more compact structure, more rigidity, an enhanced chemical resistance usability at higher temperatures up to 105 C. Eco funnel HDPE bottles HDPE helmet PVC : Vinyl chloride polymers. mainly amorphous thermoplastics with very good chemical resistance has a good chemical resistance, especially against oils. Flexible PVC Pipe PVC foam board PVC Fitting headlamp enclosures Polymeric Materials Chapters 14 and 15 What you should understand by the end of this chapter: How polymers are constructed from hydrocarbon molecules. How polymers are characterized in terms of chain length and molecular weight . The various structural forms that polymer chains can take. The difference between thermoplastics and thermosets . The nature of crystallinity in polymers. The mechanical properties of polymers. Natural Polymers Polymers are common in nature. They are natures building materials: wood, rubber, leather, silk, and so on. Synthetic Polymers Only recently have we become able to manufacture polymers artificially. nylon, vulcanized rubber, Kevlar fibers, epoxy, polystyrene... Rainwear Kevlar Vest Polymers and Recycling The numbers inside the arrows on every plastic product tell you what polymer it is. 1. poly(ethylene terephthalate) ( PET ) - plastic bottles 2. high-density polyethylene ( HDPE ) - plastics of all kinds, high-strength fibers 3. poly(vinyl chloride) ( PVC ) - water pipes, LP records, vinyl car tops 4. low-density polyethylene ( LDPE ) - plastic films, bags 5 . polypropylene ( PP ) - fibers for rope, indoor-outdoor carpeting 6. polystyrene ( PS ) - rigid plastics of all kinds, polystyrene foams 7. other, including items made from more than one kind of polymer More Info: http://www.chemheritage.org /EducationalServices/faces/ poly/readings/rec.htm http://www.kenoshacounty.c om/community/recycling/rec ycling.html Building Blocks:...
View Full Document

This note was uploaded on 09/28/2011 for the course 1M03 material 1 taught by Professor Llllll during the Spring '11 term at McMaster University.

Page1 / 32

ch14&15 - . Plastics in Everyday Applications ....

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online