Ionic liquid catalyzed synthesis of organosoluble wholly aromatic optically active polyamides

Mallakpour, Shadpour; Seyedjamali, Hojjat

doi:10.1007/s00289-009-0044-0

Cited by 19 publications

(8 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper, four PAIs were synthesized respectively from four aromatic diimide-diacids based on different chain length of amino acids (glycine, β-alanine, 4-aminobutyric acid, or 6-aminocaproic acid) and 4,4′-diaminodiphenyl ether, by using either TBAB medium [17] or traditional polycondensation agent [18,19]. These polymers were characterized by 1 H-NMR (400 MHz) in DMSO-d 6 , FT-IR, elemental analysis, thermal gravimetric analysis, and differential scanning calorimetry (DSC).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polyamide-imides based on the different chain length of amino acids in molten TBAB as a green media

Feng

Yang

et al. 2016

Green Processing and Synthesis

View full text Add to dashboard Cite

As a green, safe and eco-friendly solvent, ionic liquids (ILs) have been widely used in organic syntheses. In this paper, polyamide-imides (PAIs) based on different chain length of amino acids were synthesized by two methods, i.e. in the presence of tetrabutyl ammonium bromide (TBAB) as IL and via conventional polycondensation. The obtained results have been compared. It was confirmed that by the polymerization method in the IL, the PAIs can get higher molecular weight and viscosity and better heat resistance and crystallinity after annealing treatment. All polymers showed higher tensile strength (122)(123)(124)(125)(126)(127)(128)(129)(130)(131)(132)(133)(134) and tensile modulus (2.4-3.0 GPa). Among them, the molecular weight of PAIs based on glycine was characterized by gel permeation chromatography.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polyamide-imides based on the different chain length of amino acids in molten TBAB as a green media

Feng

Yang

et al. 2016

Green Processing and Synthesis

View full text Add to dashboard Cite

show abstract

“…Recently, many studies dealing with the application of ILs in organic synthesis and catalysis have been published, pointing out the vast interest in this type of compounds [33][34][35][36]. With these facts in mind, we studied their catalytic potential for two condensation reactions of carbonyl compounds.…”

Section: Introductionmentioning

confidence: 99%

New Brønsted Ionic Liquids: Synthesis, Thermodinamics and Catalytic Activity in Aldol Condensation Reactions

Cota¹,

Gonzalez-Olmos²,

Iglesias³

et al. 2013

Ionic Liquids - New Aspects for the Future

View full text Add to dashboard Cite

“…Aromatic polyamides, such as poly ( p ‐phenylene terephthalamide) developed by Du Pont (Wilmington, DE) in the early 1960s,1 are well‐known as high‐performance polymers due to their excellent thermal, mechanical, and chemical properties 2–12. Aromatic polyamides are finding increasing demand for use as advantageous replacements for metals or ceramics in currently used goods, or even as new materials in novel technological applications 5, 13–24…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of novel aromatic polyamides via Yamazaki–Higashi phosphorylation method

Zhao

Fang

et al. 2012

J of Applied Polymer Sci

View full text Add to dashboard Cite

We synthesized four aromatic diacids: 1,3‐bis(3‐carboxyphenoxy)benzene, 1,4‐bis(4‐carboxyphenoxy)benzene, 1,4‐bis(3‐carboxyphenoxy) benzene, and 1,3‐bis(4‐carboxyphenoxy)benzene, following a procedure of a previously reported synthesis (Ueda and Komatsu, J Polym Sci Part A: Polym Chem 1989, 27, 1017). These diacids were condensed directly with aromatic diamines 4,4′‐oxydianiline (ODA), via the Yamazaki–Higashi phosphorylation method in the presence of triphenylphosphite (TPP), pyridine (Py) and halide salts to give high molecular aromatic polyamides (PAs). The synthesized PAs were obtained in quantitative yields with inherent viscosities between 0.5 and 1.0 dL g−1. The structures and properties of the obtained PAs were characterized by Fourier transform infrared (FTIR) spectra, nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA), polarizing optical microscope (POM). Four PAs all showed good solubility in polar solvents, such as dimethylsulfoxide (DMSO), N,N‐dimethylacetamide (DMAc), N‐dimethylformamide (DMF), 1‐methylpyrrolidone (NMP), and so on. The obtained polymers showed high thermal stability with decomposition temperature around 400°C. The polyamide membranes manifest excellent mechanical properties, with Young's modulus of 2.5–5.5 GPa. Interestingly, the film of PA‐1, PA‐2, and PA‐3 is completely transparent in the visible range, while PA‐4 film is opaque. Crystallization was observed in PA‐4 film, although the molecular structure of PA‐4 is not as symmetrical as PA‐2. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

show abstract

Ionic liquid catalyzed synthesis of organosoluble wholly aromatic optically active polyamides

Cited by 19 publications

References 29 publications

Synthesis and characterization of polyamide-imides based on the different chain length of amino acids in molten TBAB as a green media

Synthesis and characterization of polyamide-imides based on the different chain length of amino acids in molten TBAB as a green media

New Brønsted Ionic Liquids: Synthesis, Thermodinamics and Catalytic Activity in Aldol Condensation Reactions

Synthesis and characterization of novel aromatic polyamides via Yamazaki–Higashi phosphorylation method

Contact Info

Product

Resources

About