2007-03-12 06:41:19 · 6 answers · asked by Alien Anjali 2 in Science & Mathematics ➔ Chemistry
C15H12Br4O2
2007-03-12 06:45:54 · answer #1 · answered by Anonymous · 0⤊ 1⤋
I don't know where the other answerer's are coming out with concise formulas containing bromine. Polyester is a polymer and as such does have a concise, not repeating formula.
Two types of polyester are generally made. These include alkyd resins, made by reacting phthalic anhydride with glycols and/or glycerin. Alkyd polyester resins are used in paints and coatings.
The second type are polyester resins use to build boats and the like. These are made by reaction phthalic and maleic anhydride with glycols. Maleic anyhydride contains a carbon double bond, which is reacted with styrene to crosslink the polyester resin.
Incidentally, brominated polyester resins are used for flame retardant applications but not in common alkyds or polyesters.
2007-03-12 06:55:31 · answer #2 · answered by Flyboy 6 · 1⤊ 0⤋
Polyester is a category of polymers, or, more specifically condensation polymers, which contain the ester functional group in their main chain. Usually, polyester refers to cloth woven from polyester fiber. Polyester clothing is generally considered to have a "less natural" feeling to it compared to natural fibers. Polyester fibers are often spun together with fibers of cotton, producing a cloth with some of the better properties of each.
Close-up of a polyester shirtAlthough polyesters do exist in nature (e.g., in the cutin of the plant cuticle), polyester generally refers to the large family of synthetic polyesters (plastics) which includes polycarbonate and above all polyethylene terephthalate (PET). PET is one of the most important thermoplastic polyesters.
Polyester is combustible but due to its thermoplastic nature, it tends to shrink away from the flame source and often self-extinguishes.
2007-03-12 06:55:58 · answer #3 · answered by Anonymous · 0⤊ 0⤋
C15H12Br4O2
2007-03-12 06:47:01 · answer #4 · answered by elflaeda 7 · 0⤊ 1⤋
it's a polymer made with chains of carbon, hidrogene and oxigene (the ester fuctional group), the skeleton of the chain is made with carbon atoms and Oxigene.
......-CO-O-CH2-.....
2007-03-12 06:48:42 · answer #5 · answered by Pichurri 4 · 0⤊ 0⤋
For the best answers, search on this site https://shorturl.im/aygr2
this is as far as I can get with the solution I cannot resolve the final ratios - perhaps you can ?? mass of CO2 : 1.4710 g : given in the question moles of CO2 : 0.0334 moles : / formula mass of CO2 (44) moles of carbon : 0.0334 moles : same as the moles of C in the CO2 mass of carbon : 0.4014 g : X the atomic weight of C to get the mass mass of water : 0.3910 g : given in the question moles of water : 0.0217 moles : / formula mass of H2O (18) moles of H : 0.0434 moles : X 2 the moles of H in the H2O mass of H : 0.0438 g : X the atomic weight of H to get the mass Mass of compound : 0.6943 g : given in the question mass of O : 0.2491 g : mass of the compound - mass of (C+H) moles of O : 0.0156 moles : / atomic weight of O to get the number of moles in summary : moles C 0.0334 H 0.0434 O 0.0156 divide by smallest to get the ratio C 2.15 H 2.79 O 1.00
2016-04-05 05:04:02 · answer #6 · answered by ? 4 · 0⤊ 0⤋
This link may help
http://www.toray.co.jp/english/films/products/lumirror/index.html
2007-03-12 06:49:11 · answer #7 · answered by brainlady 6 · 0⤊ 0⤋