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

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%.

Synthesis and characterization of poly(pyridinium salt)s derived from various aromatic diamines

Polymer ◽  
2012 ◽  
Vol 53 (5) ◽  
pp. 1063-1071 ◽  
Author(s):  
Tae Soo Jo ◽  
Alexi K. Nedeltchev ◽  
Bidyut Biswas ◽  
Haesook Han ◽  
Pradip K. Bhowmik
Keyword(s):  
Pyridinium Salt ◽  
Synthesis And Characterization ◽  
Aromatic Diamines

Synthesis and Characterization of New Fluorinated Poly(Imide Benzoxazole)S

1996 ◽  
Vol 8 (3) ◽  
pp. 395-406 ◽  
Author(s):  
Frank W Mercer ◽  
Martin T McKenzie ◽  
Maria Bruma ◽  
Burkhard Schulz
Keyword(s):  
Thermal Stability ◽  
Dielectric Constant ◽  
Synthesis And Characterization ◽  
Aromatic Diamines ◽  
Film Forming ◽  
Poly Imide

We have prepared a series of fluorinated aromatic poly(ether imide benzoxazole)s (PEIBs) and fluorinated aromatic poly(imide benzoxazole)s (PIBs). New PEIBs were prepared by polycondensation of aromatic diamines containing both benzoxazole and hexafluoroisopropylidene groups. New PIBs were prepared by polycondensation of bis( o-aminophenol)s, such as 3,3′-dihydroxybenzidine or 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane, with diacid chlorides containing both imide and hexafluoroisopropylidene groups. We have characterized the solubility, film forming ability, thermal stability and dielectric constant of these fluorinated poly(imide benzoxazole)s.

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