ISSN:
0449-296X
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Polyaddition reactions of 1,1′-tetramethylenebis(3,3-ethyleneurea) (IIa), 1,1′-octamethylenebis(3,3-ethyleneurea) (IIb), 1,1′-p-phenylenebis(3,3-ethyleneurea) (IIc), 1,1′-(4,4′-diphenylmethane)bis(3,3-ethyleneurea) (IId) and 1,1,3,3-diethyleneurea (III) with polymethylene dimercaptans were investigated. 1,1′-Polymethylenebis(3,3-ethyleneureas) and polymethylene dimercaptans successfully reacted at 80-95°C. in the presence of triethylamine to give poly(urea sulfides) with intrinsic viscosities up to 1.1 in about 90% yield when dimethylformamide, dimethylacetamide, or N-methyl-2-pyrrolidone containing lithium chloride as a solvent were used. The other ethyleneureas, however, failed to give high molecular weight polymers.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1966.150040110
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