Aromatic polyamide with parabanic structure

Dibenzyl structure on the macromolecular chain. XII. Polyureas: structure-property relatonships

“…Polymers with the dibenzyl structure (1,2‐diphenylethane) within their macromolecular main chains exhibit advanced packing degree because of the possible rotation of the two aromatic rings around the 1,2 ethane bond. This fact was observed and exploited by some authors in order to obtain a diversity of polymers: polyurethanes,1–3 polyamides,4, 5 polyimides,2, 4–6 poly(parabanic acids),7–10 polybenzimidazoles,11 polyethers,12 etc.…”

“…Our previous papers presented the influence of the isomers of dibenzyl structure on the properties of some polymers like polyurethanes,2, 3 polyamides,5 polyimides,6 poly(parabanic acids)7–10 or polybenzimidazoles 11. The present paper illustrates the important differences induced by the dibenzyl isomers on properties such as thermal stability, solubility and semicrystalline structure of some polyureas.…”

Synthesis and Characterisation of Colorants Derived from 1,4-Diamino Anthraquinone Polyamides

“…The solution was then poured into a blender cup containing 200 ml water and vigorously blended to precipitate the polymer. The polymer was filtered, washed several times with water and dried in an oven at 100˚C for 15minutes [18][19][20].…”

Synthesis and Characterisation of Polyamides Containing 1,4-Dithiin-2,3 : 5,6-tetrayl Diimide Structures

“…The goal of better solubility together with retained high thermal stability could be achieved by preparing polyamides starting from monomers containing bulky substituents as pendant groups, [2][3][4] such as sulfonyl groups, [5] tricyclic fused rings [6,7] (e. g., dibenzo-p-dioxin, phenoxathiin, thianthrene), or heterocyclic rings [8] (e. g., parabanic acid) to disrupt the polymer chain planarity.…”