ISSN:
0449-2951
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
β-Propiolactone and propylene sulfide with triethylamine catalyst produced only polypropiolactone, but the lactone and DL-valine N-carboxy anhydride gave a copolymer of low molecular weight. Neither the classical copolymer equation nor the relationship pointed out by O'Driscoll applies to this copolymerization, but the valine N-carboxy anhydride was obviously the much more reactive. The rate of acid-catalyzed copolymerization of N-(2-hydroxyethyl)aziridine and N-(2-hydroxy-n-propyl)aziridine was essentially equal to the sum of the rates of the homopolymerizations of the two monomers, as was found by Shalitin and Katchalski for several pairs of N-carboxy-α-amino acid anhydrides. A mixture of propylene oxide and epichlorohydrin did not exhibit this ideal behavior and was polymerized very little more rapidly than propylene oxide alone.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1964.100020931
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