Journal ArticleDOI
Synthesis of novel aromatic polyamides containing cardo groups and triphenylphosphine oxide structures by a heterogeneous palladium-catalyzed carbonylation and condensation reaction
TLDR
In this article, a heterogeneous palladium-catalyzed carbonylation and condensation of bis(4-(3-iodophenoxy)phenylphenylphosphine oxide (BIPPO), aromatic diamines bearing cardo groups, and carbon monoxide was carried out in N,N-dimethylacetamide under 1m of CO at 120 °C in the presence of a magnetically recyclable heterogeneous Palladium catalyst and 1,8-diaza-bicyclo[5,4,0]-7-undeceneAbstract:
New aromatic polyamides containing cardo groups and triphenylphosphine oxide structures were synthesized by a heterogeneous palladium-catalyzed carbonylation and condensation of bis(4-(3-iodophenoxy)phenyl)phenylphosphine oxide (BIPPO), aromatic diamines bearing cardo groups, and carbon monoxide. Polycondensations were carried out in N,N-dimethylacetamide under 1 atm of CO at 120 °C in the presence of a magnetically recyclable heterogeneous palladium catalyst and 1,8-diaza-bicyclo[5,4,0]-7-undecene (DBU) and afforded novel aromatic polyamides with inherent viscosities between 0.72 and 0.76 dL/g. All the polyamides were quite soluble in dipolar aprotic solvents and pyridine and could be converted into transparent, flexible, and tough polyamide films by casting from DMAc solutions. These polymers exhibited high thermal and thermooxidative stability with the glass transition temperatures of 237 °C–256 °C, the temperatures at 5% weight loss of 448 °C–465 °C in air. All the phosphorus-containing polyamides self-extinguished as soon as the flame was removed, and the limited oxygen indices (LOIs) of these polymers were in the range of 39%–44%. The polymer films also showed good mechanical properties and high optical transparency.read more
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Intrinsically Flame Retardant Polyamides: Research progress in the last 15 years
Nikita Drigo,Sabyasachi Gaan +1 more
TL;DR: In this paper , a review of flame resistant polyamides is presented, based on their chemical structures: aliphatic, semi-aromatic, aromatic, polyamide, polyamidoimides and hybrid siloxane-polyamides.
References
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Journal ArticleDOI
Efficient, selective, and recyclable palladium catalysts in carbon-carbon coupling reactions.
TL;DR: C-C Couplings in Continuous Systems 2308 12.1.
Journal ArticleDOI
High-performance aromatic polyamides
TL;DR: In this paper, a high-performance organic material is considered to be highperformance organic materials due to their outstanding thermal and mechanical resistance, which result in stiff rod-like macromolecular chains that interact with each other via strong and highly directional hydrogen bonds.
Book
Aromatic High-Strength Fibers
TL;DR: Aromatic polyamides aromatic polyhydrazide aromatic polyesters aromatic polyazomethines aromatic polyimides aromatic heterocyclic polymers as mentioned in this paper have been shown to have similar properties.
Journal ArticleDOI
High glass transitions of new polyamides, polyimides, and poly(amide-imide)s containing a triphenylamine group: Synthesis and characterization
TL;DR: A triphenylamine-containing diamine monomer was successfully synthesized by the cesium fluoride-mediated condensation of 3,4-dimethylaniline with 4-fluoronitrobenzene, followed by reduction as mentioned in this paper.