Ladder type polymers from dihydroxyaromatic compounds and dialdehydes

Abstract

Ladder polymers were synthesized by reaction of dihydroxynaphthalene and bisphenols with malondialdehyde and glutardialdehyde. Differential scanning calorimetry and thermogravimetric analysis were used to determine the thermal behaviour of the polymers, and conductivities of two representative polymers were measured. Ladder polymers with higher molecular weights showed better thermal resistance.ZUSAMMENFASSUNG: Durch Reaktion von Dihydroxynaphthalinen und Bisphenolen mit Malondialdehyd und Glutardialdehyd wurden Leiterpolymere hergestellt, deren thermisches Verhalten mit DSC und Thermogravimetrie untersucht wurde. An zwei Produkten wurden Leitfähigkeitsmessungen vorgenommen. Leiterpolymere mit höherem Molekulargewicht waren thermisch beständiger als solche mit geringerem.

One-pot synthesis of novel ladder type condensation polymers via condensation reactions of dihydroxyaromatic compounds and 2,5-dimethoxytetrahydrofuran

“…Some of the dialdehydes and especially their synthetic equivalents are interesting reactive precursors in organic polymer chemistry and are considered as useful starting materials for the preparation of the thermally stable polymers [7][8][9][10][11][12]. Condensation reactions of diphenols with glyoxal in the presence of sulfuric acid and methanesulfonic acid and formation of ladder type polymers were reported previously [13].…”

Synthesis of novel ladder polymers of poly(3,4‐dihydro‐2H‐pyran‐2‐methanol)

“…These incorporate both flat, packable monomers as well as bulky monomers to inhibit chain packing 1, 2. The ladder characteristics were dependent on the nature and length of the crosslinks, polymerization solvent, and lateral interactions between polymer molecules 3–10…”