ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The study of the autocondensation of thiodiglycol initiated in Part I has been extended under conditions likely to give water-insoluble polymers of higher molecular weight. The catalytic power of 27 compounds was first determined, and the rates of polymer production were assessed for reaction in the presence of those eleven compounds thus found to be most effective. On the basis of mean molecular weight (3300), solubility in benzene, yield, and appearance of the product, phosphorus pentoxide was chosen for more exhaustive tests. Heating thiodiglycol with P2O5 (2.0%) for 12 hr. at 140°/760 mm., followed by heating for increasing periods at 150°/40 mm., yielded products ranging from a viscous liquid (M.W. 2500; ηsp 0.067) to a rubbery dark-brown wax (M.W. 6500; ηsp 1.061). The solubility in benzene, chloroform, and dichlorodiethyl ether decreased with increasing molecular weight. The catalyst tended to become exhausted: this was found to be due to chemical combination. 2,2′-Dihydroxydiethyl disulfide was successfully autocondensed under similar conditions to give an elastic, insoluble polymer with some tendency to cold flow, presumably built up from C2H4OC2H4S2 units.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1959.1204113819
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