Poly Dihydroxymethylcyclohexyl Terephthalate

Poly(dihydroxymethylcyclohexyl terephthalate) was introduced by Eastman Kodak as Kodel in 1958. Here, the insertion of the cyclohexyl moiety gives a more hydrophobic material (in comparison to PET and PBT) as well as a more moldable product that can very readily be injected-molded. (See Figure 7.) The polymer s sole raw material is dimethyl terephthalate. Reduction of dimethyl terephthalate yields the dialcohol, cyclohexa-nedimethanol. Kodel, along with its blends and mixtures, is often extruded into film and sheeting for packaging. Kodel-type materials are used to pack-... 

Draw the structural formula (one repeating unit) for each of the following polymers (a) poly(4-methylpent-l-ene) (b) poly(chlorotri uoroethylene) (c) poly(vinyl ethyl ether) (d) poly(vinylidene chloride) (e) polyethyleneimine (f) poly(methyl-2-cyano-acrylate) (g) polychloroprene (h) poly(buty-leneterephthalate) (i) poly(l,2-propylene oxalate) (j) poly(dihydroxymethylcyclohexyl terephthalate) (k) poly-caprolactam (nylon-6) (1) polyformaldehyde (m) poly-oxymethylene (n) poly(propylene oxide) (o) poly (propylene glycol) (p) poly(p-phenylene sulfone) (q) poly(dimethyl siloxane) (r) poly (vinyl butyral) (s) poly (p-phenylene) (t) poly(p-xylylene) (u) polycaprolactone... 

Ans. (a) Poly(tetramethylene terephthalate) or poly(butylene terephthalate) (b) polycyclohexylene terephthalate) or poly(dihydroxymethylcyclohexyl terephthalate) (c) poly(hexamethylene sebacamide) (d) poly(rM-phenylene isophthalamide)]... 

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