a.Polymer Research Lab, Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
b.Chemistry Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
c.Chemistry Department, Faculty of Science, Minia University, El-Minia 61519, Egypt
d.Chemistry Department, College of Science, King Faisal university, Al Hufuf, 31982 Al Hassa, Saudi Arabia
amr_hassanegypt@ymail.com amr_hassanegypt@science.sohag.edu.eg
收稿:2017-09-17,
录用:2017-12-9,
网络首发:2018-03-27,
纸质出版:2018-07
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Kamal I. Aly, Amr H. Moustafa, Essam K. Ahmed, 等. New Polymer Syntheses Part 60: A Facile Synthetic Route to Polyamides Based on Thieno[2,3-
Kamal I. Aly, Amr H. Moustafa, Essam K. Ahmed, et al. New Polymer Syntheses Part 60: A Facile Synthetic Route to Polyamides Based on Thieno[2,3-
Kamal I. Aly, Amr H. Moustafa, Essam K. Ahmed, 等. New Polymer Syntheses Part 60: A Facile Synthetic Route to Polyamides Based on Thieno[2,3-
Kamal I. Aly, Amr H. Moustafa, Essam K. Ahmed, et al. New Polymer Syntheses Part 60: A Facile Synthetic Route to Polyamides Based on Thieno[2,3-
Polyamides containing thieno[2
3-
b
]thiophene moiety were prepared
via
a simple polycondensation reaction of the diaminothieno[2
3-
b
]thiophene monomer
1a
with different kinds of diacid chlorides (including oxalyl
adipoyl
sebacoyl
isophthaloyl
terephthaloyl
4
4′-azodibenzoyl
3
3′-azodibenzoyl
p
-phenylene diacryloyl) in the presence of LiCl and NMP as a solvent through low-temperature solution polycondensation. The chemical structures of model compound and synthesized polyamides were confirmed by FTIR
nuclear magnetic resonance spectroscopy (including
1
H-NMR and
13
C-NMR) and elemental analysis. In addition
the thermal stability
crystallinity structure and surface morphology of synthesized polyamides were characterized
via
thermogravametric analysis (TGA)
wide-angle X-ray diffraction analysis (WAXD) and scanning electron microscopy (SEM). Also
the corrosion inhibition behavior of selected examples of polyamides was investigated; the inhibitive effect of the investigated polymers for carbon steel in 1.0 mol·L
−1
HCl was studied using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) methods. PDP results displayed that the polyamides containing thieno[2
3-
b
]thiophene moiety can be as mixed-type inhibitors. The inhibition efficiency (
P
%) was found to be in the range from 67.13% to 96.01%. There is an increase in
P
by the synthesized polymers in comparison to the starting monomer. The adsorption of these polymers was found to obey Langmuir adsorption isotherm.
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