ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
A limited number of polar, nonhydroxylic organic liquids are suitable swelling media for chemical modification of wool. An effective medium for acylating-type internal modification should have low molecular weight, should lack active hydrogen atoms, be highly polar, swell wool fibers, have a high boiling point, and exert a catalytic effect. Rates of modification by phenyl isocyanate, myristoyl chloride, and dodecenylsuccinic anhydride in different media decrease in the order dimethyl sulfoxide 〉 dimethylformamide 〉 1-methyl-2-pyrrolidinone 〉 4-butyrolactone. Nevertheless, equal maximum uptake of a given reagent in these varied media is evidence of internal chemical modification. Further examples of modifying reagents are phenyl isothiocyanate, benzyl chlorides, and α-haloketones. Supercontraction and single-fiber stress-strain data indicate crosslinking by bifunctional isocyanates and acid chlorides.
Additional Material:
12 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1977.070210212
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