ISSN:
0360-6376
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Sebacates from alcohols having a 1,4-pyrone nucleus were synthesized, and their reactivities toward diamine were investigated. The polycondensation reactions of di(6-hydroxymethyl-1,4-pyron-3-yl) sebacate or di(2-methyl-1,4-pyron-3-yl) sebacate with hexamethylenediamine took place easily even at room temperature to form a high molecular weight nylon 610 in a quantitative yield. The reactivities of these active diesters with diamine were much higher than that of the corresponding diphenyl ester and were almost comparable to those of acid chlorides. It was also found that inorganic salts such as lithium chloride, zinc chloride, or calcium chloride had a strong influence on the molecular weight of the resulting polyamide. The reactivity enhancement of the active diesters toward aminolysis could be attributed mainly to the acidic character of the leaving group.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1977.170150508
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