ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Trially phosphate has been polymerized in emulsion by itself and with four halogenated methanes: carbon tetrabromide, bromoform, bromotrichloromethane, and carbon tetrachloride. Of the four halomethanes, carbon tetrachloride enters telomer formation only to a slight extent, and bromoform and carbon tetrabromide enter to the greatest extent. In most cases a product consisting of two distinct fractions was formed, a solid-insoluble polymer, and a liquid-soluble polymer. The latter is of only a low degree of polymerization, ranging from 1.0 to 2.3 phosphate units. In the course of the reaction, the soluble fraction is formed first and then is partially converted to the insoluble fraction by crosslinking. The polymerization of trially phosphate with bromoform received the most study. In this case the ratio of insoluble to soluble fraction can be changed by varying the amount of initiator and the ratio of bromoform to phosphate. A molar ratio of bromoform to trially phosphate greater than 2.0 yields only monomeric addition products. By the proper choice of conditions a very stable emulsion of a polymer containing phosphorus and bromine can be obtained. This emulsion is suitable for direct application to cotton textiles in order to produce flame-resistant fabrics.
Additional Material:
4 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1956.120209507
Permalink