scholarly journals Synthesis and characterization of novel aromatic polyimides from Z-type sexiphenyltetracarboxylic dianhydride and aromatic diamines

2014 ◽  
Vol 46 (5) ◽  
pp. 255-263 ◽  
Author(s):  
Takafumi Nakagawa ◽  
Atsushi Morikawa
Keyword(s):  
Synthesis And Characterization ◽  
Aromatic Diamines ◽  
Aromatic Polyimides

Synthesis and characterization of novel polyimides derived from 2,6-bis[4-(3,4-dicarboxyphenoxy)benzoyl]pyridine dianhydride and aromatic diamines

Polymer ◽  
2006 ◽  
Vol 47 (11) ◽  
pp. 3774-3783 ◽  
Author(s):  
Xiaolong Wang ◽  
Yan-Feng Li ◽  
Tao Ma ◽  
Shujiang Zhang ◽  
Chenliang Gong
Keyword(s):  
Synthesis And Characterization ◽  
Aromatic Diamines

scholarly journals Synthesis and characterization of perfluoroalkyl-substituted aromatic polyimides.

1995 ◽  
Vol 8 (2) ◽  
pp. 281-288 ◽  
Author(s):  
YOSHIYUKI OISHI ◽  
JUNPEI KANAZAWA ◽  
HIDETOSHI HIRAHARA ◽  
KUNIO MORI
Keyword(s):  
Synthesis And Characterization ◽  
Aromatic Polyimides

Synthesis and characterization of aromatic polyimides containing tetraphenylfuran-thiazole moiety

2018 ◽  
Vol 135 (6) ◽  
pp. 3057-3068 ◽  
Author(s):  
Y. S. Patil ◽  
P. H. Salunkhe ◽  
J. N. Mahindrakar ◽  
S. S. Ankushrao ◽  
V. N. Kadam ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Aromatic Polyimides

Synthesis and characterization of new poly(diketone imide)s derived from 1,4-bis(3,4-dicarboxybenzoyl)benzene dianhydride and various diamines

2020 ◽  
Vol 32 (9) ◽  
pp. 1043-1051
Author(s):  
Lu Kuang ◽  
Wei-Hong Wei ◽  
Xiao-Yan Sang ◽  
Yang Pan ◽  
Cheng Song
Keyword(s):  
Mechanical Property ◽  
Tensile Strength ◽  
Ring Opening ◽  
Tensile Modulus ◽  
Amic Acid ◽  
Synthesis And Characterization ◽  
Aromatic Diamines ◽  
Thermal Imidization ◽  
Stage Process

1,4-Bis(3,4-dicarboxybenzoyl)benzene dianhydride, an aromatic bis(ketone anhydride) monomer, was synthesized by the Friedel–Crafts reaction of terephthaloyl dichloride and o-xylene, followed by the oxidation of the intermediate tetramethylated compound and cyclodehydration of the resulting tetraacid. A series of new poly(diketone imide)s (PDKIs) were prepared from this dianhydride with various aromatic diamines via a conventional two-stage process that included ring-opening polyaddition to form the poly(amic acid)s followed by thermal or chemical imidization. Most of the PDKIs through chemical imidization were soluble in aprotic amide solvents, such as N, N-dimethylacetamide, N-methyl-2-pyrrolidone, m-cresol, and so on. The resulting PDKIs had good thermal property with the glass transition temperature of 203–275°C, the temperature at 5% weight loss of 500–539°C, and the residue of 51–60% at 800°C in nitrogen. Additionally, strong and flexible PDKI films obtained by thermal imidization exhibited outstanding mechanical property with the tensile strength of 88.8–158.5 MPa, tensile modulus of 1.9–3.5 GPa, and elongation at breakage of 7–21%.

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