Preparation of aromatic polyesters by the direct polycondensation reaction with diphenyl chlorophosphate in pyridine

In this study, a highly effective flame retardant agent, called polybicyclopentaerythritol phosphate-O-4-imino-p-phenylmethane-4-imino-2-chloro-1,3,5-s-triazine (PEDMCD), has been prepared through a direct polycondensation reaction.

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Thermal and optical properties of new poly(amide-imide)-nanocomposite reinforced by layer silicate based on chiral n-trimellitylimido-L-valine

Macedonian Journal of Chemistry and Chemical Engineering ◽

10.20450/mjcce.2012.59 ◽

2012 ◽

Vol 31 (1) ◽

pp. 79

Author(s):

Khalil Faghihi ◽

Masoumeh Soleimani ◽

Shabnam Nezami ◽

Meisam Shabanian

Keyword(s):

Main Chain ◽

Nanocomposite Films ◽

Direct Polycondensation ◽

Polycondensation Reaction ◽

X Ray Diffraction ◽

Solution Intercalation ◽

X Ray ◽

Vis Spectroscopy ◽

Polymeric Chains ◽

Morphology And Structure

Two new samples of poly(amide-imide)-montmorillonite reinforced nanocomposites containing N-trimellitylimido-L-valine moiety in the main chain were synthesized by a convenient solution intercalation technique. Poly(amide-imide) (PAI) 5 as a source of polymer matrix was synthesized by the direct polycondensation reaction of N-trimellitylimido-L-valine (3) with 4,4′-diaminodiphenyl ether 4 in the presence of triphenyl phosphite (TPP), CaCl2, pyridine and N-methyl-2-pyrrolidone (NMP). Morphology and structure of the resulting PA-nanocomposite films (5a) and (5b) with 10 and 20 % silicate particles were characterized by FTIR spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The effect of clay dispersion and the interaction between clay and polymeric chains on the properties of nanocomposite films were investigated by using Uv-vis spectroscopy, thermogravimetric analysis (TGA) and water uptake measurements.

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Synthesis and characterization of SPDSCD and its flame retardant application on epoxy resins

RSC Advances ◽

10.1039/d0ra05167e ◽

2020 ◽

Vol 10 (48) ◽

pp. 28654-28663

Author(s):

Yi Zhang ◽

Weiwei Yang ◽

Wei Zhao ◽

Fang Ruan ◽

Shulei Li ◽

...

Keyword(s):

Flame Retardant ◽

Epoxy Resins ◽

Synthesis And Characterization ◽

Direct Polycondensation ◽

Polycondensation Reaction

In this study, a flame retardant agent, 2,4,8,10-tetraoxo-3,9-diphosphospiro[5.5]undecane spirophosphate-4,4-diaminopair benzene disulfone-1,3,5-himetriazine (SPDSCD), is synthesized through a direct polycondensation reaction.

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Direct Polycondensation Reaction Using Polymeric Triphenylphosphine as an Initiator

Polymer Journal ◽

10.1295/polymj.19.1351 ◽

1987 ◽

Vol 19 (12) ◽

pp. 1351-1357 ◽

Cited By ~ 2

Author(s):

Naoya Ogata ◽

Kohei Sanui ◽

Masayoshi Watanabe ◽

Hideko Sakai

Keyword(s):

Direct Polycondensation ◽

Polycondensation Reaction

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Synthesis and properties of new polyamide-organoclay nanocomposites containing pyrazine moiety in the main chain

Science and Engineering of Composite Materials ◽

10.1515/secm-2011-0105 ◽

2012 ◽

Vol 19 (3) ◽

pp. 215-220

Author(s):

Khalil Faghihi ◽

Mohammad Naderi-Ghomi ◽

Mohsen Hajibeygi

Keyword(s):

Main Chain ◽

Nanocomposite Films ◽

Triphenyl Phosphite ◽

Direct Polycondensation ◽

Polycondensation Reaction ◽

X Ray Diffraction ◽

Solution Intercalation ◽

X Ray ◽

Diaminodiphenyl Sulfone ◽

Thermal Stability Of

AbstractA series of polyamide (PA)/montmorillonite nanocomposites containing pyrazine moiety in the main chain were synthesized by a convenient solution intercalation technique. PA 3 as a source of polymer matrix was synthesized by the direct polycondensation reaction of pyrazine-2,3-dicarboxylic acid 1 with 4,4′-diaminodiphenyl sulfone 2 in the presence of triphenyl phosphite, CaCl2, pyridine, and N-methyl-2-pyrrolidone. The resulting nanocomposite films were characterized by Fourier transform infrared spectra, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis (TGA). The results showed that organo-modified clay was dispersed homogeneously in the PA matrix. TGA indicated an enhancement of thermal stability of new nanocomposites compared with the pure polymer.

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