Synthesis, characterization, and water sorption properties of new aromatic polyamides containing benzimidazole and ethylene oxide moieties

Ayala, Vanesa; Maya, Eva M.; García, José Miguel; Campa, José G. de la; Lozano, Ángel E.; Abajo, Javier de

doi:10.1002/pola.20486

Cited by 93 publications

(69 citation statements)

References 28 publications

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“…In the second step, 5-(2-benzimidazole)-1,3-phenylenediamine (4) was achieved with hydrazine hydrate as the reducing agent and palladium as the catalyst. [48][49][50] Construction of N-trimellitylimido-L-leucine (5) Diacid monomer 5 was prepared by the condensation reaction of one equimolar of (trimellitic anhydride) TMA and one equimolar of the natural amino acid L-leucine in refluxing acetic acid according to our previous work. 47 …”

Section: Monomer Synthesis Construction Of 5-(2-benzimidazole)-13-phmentioning

confidence: 99%

NANOPARTICLES DISPERSION IN PROCESSING NANOSTRUCTURE CHIRAL POLY(AMIDE-IMIDE)S BASED ON 7V-TRIMELLITYLIMIDO-Z,-LEUCINE/TiO2 NANOCOMPOSITES: ALLOCATION AND PROPERTIES

Mallakpour

Khani

2013

J. Chil. Chem. Soc.

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Poly(amide-imide)s (PAI)s as engineering materials have received more attention owing to their high thermal and chemical stability. Therefore, organic/ inorganic nanocomposite (NC) of these materials has been widely studied in the last few decades. Here, we present PAI-NCs preparation containing surface modified TiO 2 nanoparticles (NP)s by employing silane coupling agent under ultrasonic process. Optically active nanostructure PAI was prepared from 5-(2-benzimidazole)-1,3-phenylenediamine (4) and chiral diacid monomer N-trimellitylimido-L-leucine (5) using molten salt tetrabuthylammonium bromide as an activating medium. A considerable improvement of properties can be achieved by inserting NPs into the polymer matrix. The results of field emission scanning electron microscopy and transmission electron microscopy indicated that there is a little aggregation of a large quantity of particles. Thermogravimetric analysis confirmed that the heat stability of the polymer NCs in the temperature range of 400-800 ºC was enhanced.

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Section: Monomer Synthesis Construction Of 5-(2-benzimidazole)-13-phmentioning

confidence: 99%

NANOPARTICLES DISPERSION IN PROCESSING NANOSTRUCTURE CHIRAL POLY(AMIDE-IMIDE)S BASED ON 7V-TRIMELLITYLIMIDO-Z,-LEUCINE/TiO2 NANOCOMPOSITES: ALLOCATION AND PROPERTIES

Mallakpour

Khani

2013

J. Chil. Chem. Soc.

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“…Several approaches were reported to synthesize soluble PIs including introduction of flexible linkage and heteroaromatic rings into the polymer backbone [30]. The benzimidazole rings with heteroaromatic structure have excellent stabilities derived from its molecular symmetry and aromaticity, so the incorporation of benzimidazole group into PI backbone would improve the solubility without deterioration of their own excellent properties [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

In situ preparation of high performance polyimide nanocomposites based on functionalized multiwalled carbon nanotubes

Abdehgah

Ashouri

Mousavian

2012

Designed Monomers and Polymers

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Nanocomposites of high performance polyimide and modified multiwalled carbon nanotube were prepared via in situ polymerization technique. Neat fluorinated polyimide was synthesized from the reaction between 4,4′-(hexafluoroisopropylidene) diphthalic anhydride and 2-(3,5-diaminophenyl)-benzimidazole. Polyimide/modified carbon nanotube nanocomposites enclosing 0.5, 1, 3, and 5% of functionalized carbon nanotube were successfully prepared by an in situ polymerization reaction through thermal imidization. The Fourier transform infrared spectroscopy, X-ray diffraction, field emission type scanning electron microscope, transmission electron microscopy, and thermogravimetric analysis techniques were used to evaluate the properties of the novel nanocomposites. According to thermogravimetric analysis results, the addition of the modified multiwalled carbon nanotube improved thermal stability of the obtained hybrid materials. The morphological images show that the carbon nanotubes were dispersed homogeneously in polymer matrix. The mechanical properties of nanocomposites were substantially improved by the incorporation of functionalized carbon nanotube into the polymer matrix.

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“…The introduction of flexible chains into the polyamide backbone [3], synthesis of PAs with noncoplaner unit in the polymer chains [4], preparation of copolymers such as poly(amide-imide)s [5][6][7][8], poly (ester-imide)s [9], and poly(amide-ester-imide)s, [10] and the introduction of bulky side groups into the polymer chains [11][12][13] resulted in a series of modified PAs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of new thermally stable and organosoluble polyamides by direct polycondensation

Hajibeygi

Shabanian

2012

Designed Monomers and Polymers

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A series new thermally stable and organosoluble polyamides (PAs) 5a-f and copolyamides 10a-f with good inherent viscosities were synthesized from the direct polycondensation reaction of 1,2-bis(4-carboxyphenoxy)ethane 3 with aromatic diamines 4a-f and from the diacid 3 as a first diacid monomer and 4,4′-bis(1,3-diphenoxypropane) diacrylic acid 9 as a second diacid monomer with aromatic diamines 4a-f, respectively. The dicarboxylic acid 9 was synthesized from the two step reactions. At first 4,4′-bis(1,3-diphenoxypropane) dialdehyde 8 was synthesized from 1,3-dibromopropane 6 and 4-hydroxybenzaldehyde 7, then 4,4′-bis(1,2-diphenoxyethane) diacrylic acid 9 was synthesized from dialdehyde 8 and malonic acid in a solvent free reaction. All of the above polymers were fully characterized by 1 H NMR, Fourier transform infrared, elemental analysis, inherent viscosity, solubility tests, differential scanning calorimeter, thermogravimetric analysis, and derivative of thermogravimetric. The resulted PAs have shown admirable good inherent viscosities and thermal stability and solubility.

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Synthesis, characterization, and water sorption properties of new aromatic polyamides containing benzimidazole and ethylene oxide moieties

Cited by 93 publications

References 28 publications

NANOPARTICLES DISPERSION IN PROCESSING NANOSTRUCTURE CHIRAL POLY(AMIDE-IMIDE)S BASED ON 7V-TRIMELLITYLIMIDO-Z,-LEUCINE/TiO2 NANOCOMPOSITES: ALLOCATION AND PROPERTIES

NANOPARTICLES DISPERSION IN PROCESSING NANOSTRUCTURE CHIRAL POLY(AMIDE-IMIDE)S BASED ON 7V-TRIMELLITYLIMIDO-Z,-LEUCINE/TiO2 NANOCOMPOSITES: ALLOCATION AND PROPERTIES

In situ preparation of high performance polyimide nanocomposites based on functionalized multiwalled carbon nanotubes

Synthesis and characterization of new thermally stable and organosoluble polyamides by direct polycondensation

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