POLYMETHYL VINYL KETONE

In the early days of polymer chemistry before the mechanism of vinyl polymerization was understood, there was considerable speculation as to structures of vinyl polymers as it was not known whether the units were regularly head to tail, head to head, tail to tail, or random in arrangement. In the late thirties and early forties, we studied the reactions of many vinyl polymers such as polyvinyl chloride, polyvinyl alcohol, polymethyl vinyl ketone and polystyrene to try to settle this point,All proved to be head to tail structxires as was later predicted to be correct from the polymerization mechanism theory. Again I eii5)hasize that, at this time, infrared spectroscopy was in its infancy and NMR was unknown so structures needed to be established by chemical means. 

ABS Acrylontrile-butadiene-styrene EVA Ethylene-vinyl acetate PAI Polyamide-imide PC Polycarbonate PE Polyethylene PEEK Polyether ether ketone PES Polyether sulfone PET Polyethylene terephthalate PI Polyimide PMMA Polymethyl methacrylate PPO Polyphenylene oxide PPS Polyphenyl sulfide XLPE Crosslinked polyethylene Source Author s own files ... 

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