Preliminary characterization of some polyamides from unsaturated acids

The dynamic mechanical behaviour of polyamide systems containing different degrees of unsaturation was analyzed. The results do not show any simple relation between unsaturation and mechanical response. Particular attention was given to the a-transition, that is a glass transition, and experimental data suggest that the generally accepted mechanism for this transition requires a more extensive study.

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Polyamides from trans‐4‐octen‐1,8‐dioic and trans‐2‐trans‐6‐octadien‐1,8‐dioic acids

Lanzetta¹,

Maglio²,

Marchetta³

et al. 1973

J. Polym. Sci. Polym. Chem. Ed.

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SynopsisNovel polyamides from trans-Pocten-l,8-dioic acid (POD) and truns-%trans-&octadien-1,S-dioic acid (2,GODD) ad linear aliphatic diamines or piperasine were prepared in good yields by low-temperature polycondensation. The polymers obtained were investigated by infrared spectroscopy, x-ray diffraction, and differential scanning calorimetry. Polyamides from 4-OD show high molecular weights and crystallinities and T, above 500"K, whereas those from 2,6-ODD are very weakly crystalline and decompose without melting in nitrogen a t temperatures higher than 550'K. DSC studies revealed in the case of 4-OD polymers with odd diamines, a multiple peak phenomenon in the melting region, strongly dependent from the heating rate. Some hypotheses consistent with this behavior are briefly discussed, and it is concluded that the phenomenon arises from melt recrystallization occurring during the DSC scan. HOOCCH2 CH CH,

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Preliminary characterization of some polyamides from unsaturated acids

Cited by 5 publications

References 7 publications

Crystallographic Data and Melting Points for Various Polymers

Crystallographic Data and Melting Points for Various Polymers

Dynamic mechanical behaviour of linear polyamides with different degree of unsaturation in the chain

Polyamides from trans‐4‐octen‐1,8‐dioic and trans‐2‐trans‐6‐octadien‐1,8‐dioic acids

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