Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Aliphatic polyamides hydrogen bonded chains

Many properties of polyamides are attributable to the formation of hydrogen bonds between the NH and CO groups of neighboring macromolecules. This is evidenced by their solubility in special solvents (sulfuric acid, formic acid, m-cresol), their high melting points (even when made from aliphatic components), and their resistance to hydrolysis. In addition, polyamides with a regular chain structure crystallize very readily. [Pg.286]

Another example of cycloaliphatic group incorporation in Table III is the data for PACM/6-I/T (made from the nylon salt) (Vassallo, D. A., DuPont, unpublished results). In this case, hydrogen bonding is possible, but the distance between amide nitrogens has increased. It is difficult from these examples to delineate the effect of the aliphatic rings on polyamide OPV, although it is likely that their presence increases interchain distance much as a chain substituent would. [Pg.122]

Through systematic modification of the polymer backbone, the effects of chemical structure upon the oxygen permeation properties of aliphatic-aromatic amorphous polyamides were determined. In this class of polymers, the greatest effects were obtained by alteration of the chain length and disruption of the amide hydrogen bonding by N-alkylation. It is remarkable that reversal of the amide linkage has no effect whatsoever on the permeation properties of the examples studied. [Pg.123]


See other pages where Aliphatic polyamides hydrogen bonded chains is mentioned: [Pg.5683]    [Pg.571]    [Pg.138]    [Pg.8]    [Pg.141]    [Pg.68]    [Pg.267]    [Pg.135]    [Pg.9]    [Pg.66]    [Pg.509]    [Pg.14]    [Pg.103]    [Pg.208]    [Pg.279]    [Pg.195]    [Pg.96]    [Pg.277]    [Pg.21]    [Pg.434]    [Pg.217]    [Pg.326]    [Pg.152]    [Pg.11]    [Pg.308]    [Pg.377]    [Pg.77]    [Pg.50]    [Pg.107]    [Pg.310]   
See also in sourсe #XX -- [ Pg.52 , Pg.53 , Pg.54 ]




SEARCH



Aliphatic hydrogenation

Aliphatic polyamides

Bonding polyamides

Chain bonds

Hydrogen aliphatic

Hydrogen bonding chains

Hydrogen chains

Hydrogen-bonded chains

Polyamide hydrogen bonding

© 2024 chempedia.info