Two Stage Polymerizations. I. Preparation and Polymerization of Substituted Allyl Phenyl Ethers^1,2

Sonochemical cyclopolymerization of diallylamine in the presence of peroxomonosulfate

“…In our earlier work,16 we observed that the use of the divinyl monomer, the symmetrical nonconjugated diolefin DA, resulted in a gel‐free polymerization with smooth kinetics when DA was polymerized in the presence of ultrasound and PDS. Chain propagation involving cyclopolymerization was invoked to explain the results with the suggestions put forth by Butler and Ingley 17. We have now obtained evidence for this type of propagation with the same monomer with PMS in the presence of ultrasound, and the results are reported here.…”

Allyl Polymerizations

“…The use of this catalyst was necessary because phenols, possible by-products upon heating, inhibit polymerizations by peroxide. The allyl side chains were left untouched, and only the allyl ether groups were polymerized (66).…”

“…Another example is found in the copolymerization of vinyl n-propyl ketone with vinyl allyl ketone. The vinyl groups are first polymerized, after which more vigorous treatment will result in the cross-linking of the chains through the less readily polymerized allyl groups (66,310). These two-stage polymerizations mentioned above have many useful applications.…”

Epimerization and Fragmentation of Glucose by Quaternary Ammonium Base Type Anion Exchange Resins1

“…Although a relatively small amount of glycolic acid was formed in the glucose degradation process, the labeling pattern of this acid has revealed a rather interesting situation. The specific activity of this acid is practically the same as that of glucose, indicating the following possibilities: (1) that a C2-C4 cleavage of glucose has taken place with the C2-unit, corresponding to glucose carbon atoms 1 and 2, in turn converted to glycolic acid; or (2) that a C3-C3 split of glucose has given rise to two unequivalent units with only one of these units degraded to the C2-acid. Yet it seems probable that the latter mechanism is not involved, as suggested by the lactic acid data which demonstrate the practically complete equivalent of the C3 units in the glucose degradation.…”