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Free rotation dimensions of linear polyesters and polyamides

✍ Scribed by Malcolm B. Huglin; Jose M. Rego


Book ID
103071697
Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
410 KB
Volume
27
Category
Article
ISSN
0014-3057

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✦ Synopsis


The mean square end-to-end distance (r2)of of several families of polyesters and polyamides in the unperturbed freely rotating state has been calculated. The free rotation dimensions [(r2)of/N] t/2 and [(r2)of/M] 1/2, where N is the total number of bonds in the chain and M is the chain molecular weight, have been calculated as a function of the number of methylene units for hydroxy-carboxylic acid polyesters, amino-carboxylic acid polyamides, glycol-dicarboxylic acid polyesters, diamino-dicarboxylic acid polyamides, aromatic polyesters and polyamides. Calculations have also been made for Ekanol, Kevlar and poly (p-benzamide).


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## Abstract Polyamides and polyesters based on neocarboranedicarboxylie dichloride and previously not described have been prepared by low‐temperature polycondensation in solution and characterized. In preparing the polyamides, the following diamines were used: benzidine, hexamethylenediamine, __m__