CH3 [ - CH2 - ] - CH3 (a shorthand method) nor finally
-A-A-A-A-A-A-A-A-A-A- | B | B | B |
H H | | C - C - | | H HHomopolymer- a polymer containing a single repeat unit. A homopolymer contrasts with a copolymer.
- A - A - A* - A - A - A - A - | A | A
CHEMICAL | RANK | production in tons |
Ethylene | 4th | 48,530,000,000 |
Propylene | 7th | 28,840,000,000 |
Styrene | 20th | 11,270,000,000 |
Terephthalic Acid | 24th | 8,640,000,000 |
Acrylonitrile | 39th | 3,089,000,000 |
Vinyl Acetate | 40th | 3,020,000,000 |
Adipic Acid | 46th | 1,800,000,000 |
Bisphenol A | 48th | 1,480,000,000 |
polyethylene (low to medium density) 1,000- 2,400 poly(tetrafluoroethylene) (a.k.a. teflon) 3,500 polyethylene (high density) 4,400 poly(dimethylsiloxane) 5,000 polypropylene 5,000 poly(vinylidene chloride) 8,000 polystyrene 8,000 polyamides 9,000 to 12,500 polycarbonate 9,500 polyesters (cast- as opposed to molded) ~10,000 polysulfone 10,200- 12,000 poly(phenylene oxide) 10,500Table from Allcocke and Lampe: edition 1, chapter 21, "The Testing of Polymers" (Excellent reading!)
polyethylene 1.0 kcal/mole polyisobutylene 1.1 kcal/mole rubber 1.3 kcal/mole poly(vinyl chloride) 2.6 kcal/mole poly(vinyl acetate) 3.2 kcal/mole poly(styrene) 4.0 kcal/mole poly(vinyl alcohol) 4.2 kcal/mole The notes list a polyamide at 5.8 but don't specify which one.