Synthesis and characterization of poly(acrylate amic acid) and its application as negative-tone photosensitive polyimides

2009 ◽  
Vol 114 (4) ◽  
pp. 2395-2402 ◽  
Author(s):  
Chang-Hong Ho ◽  
Sheng Chang ◽  
Yu-Der Lee
Keyword(s):  
Amic Acid ◽  
Synthesis And Characterization ◽  
Negative Tone

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(amic acid)s from a novel aromatic diamine with bilaterally attached benzoxazole groups

2002 ◽  
Vol 10 (5) ◽  
pp. 241-245 ◽  
Author(s):  
Ji-Heung Kim ◽  
Jae Kwan Lee ◽  
Young Jun Kim ◽  
Jong Chan Won ◽  
Kil-Young Choi
Keyword(s):  
Amic Acid ◽  
Synthesis And Characterization ◽  
Aromatic Diamine

Disulfide Cross-Linked Hydrogel Scaffold Based on Poly (Amic Acid) with Tunable Degradation

2011 ◽  
Vol 391-392 ◽  
pp. 319-322
Author(s):  
Jiao Xia Sun ◽  
Yuan Liang Wang ◽  
Chang Shun Ruan ◽  
Shu Hua Dou
Keyword(s):  
Tissue Regeneration ◽  
Amic Acid ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
Surface Microstructure ◽  
Swelling Ratio ◽  
Hydrogel Scaffold ◽  
Degradation Time

The objective of this work was to create 3D hydrogel with tunable degradability for use in tissue regeneration. Therefore, we reported the synthesis and characterization of a novel degradable hydrogel based on poly (amic acid) (PAA). Unlike previously reported degradable hydrogel, these materials contained two kind of cleavable bonds to adjust their degradation. FTIR was employed to characterize the structure of PAA and hydrogels. Swelling ratio and degradation time correlated with the molar ratio of two cross-linkers and cross-linked density. The surface microstructure of hydrogels during degradation was observed by SEM. These properties changed predictably as degradation.

Synthesis and Characterization of Polyimides Derived from 5-Amino-2(p-aminophenyl) Benzoxazole Monomer

2011 ◽  
Vol 415-417 ◽  
pp. 1789-1793
Author(s):  
Xiang Li Meng ◽  
Peng Wang ◽  
Ling Jiang
Keyword(s):  
Amic Acid ◽  
Synthesis And Characterization ◽  
Polyimide Films ◽  
Glass Transition Temperatures ◽  
Good Thermal Stability ◽  
Light Yellow ◽  
Structures And Properties ◽  
Ft Ir ◽  
Tetracarboxylic Dianhydride

Polyimides prepared from 5-amino-2(p-aminophenyl) benzoxazole (AAPB) with pyromellitic dianhydride(PMDA), 2,2’3,3’-biphenyl tetracarboxylic dianhydride(i-BPDA), 4,4’-oxdiphthalic anhydride(ODPA), 1,4-bis(3,4-dicarbosyphenoxy) benzene dianhydride(HQDPA) and 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) were synthesized successfully via a conventional two-stage method. Their structures and properties were characterized by FT-IR, DSC, TG and XRD. The intermediate poly(amic acid)s had inherent viscosity range of 0.86~2.18 dL/g and could be thermally converted into light yellow polyimide films. The polyimides showed excellent solvent resistance and good thermal stability. The glass transition temperatures (Tg) were found to be 336oC~369 oC .The decomposition started at a temperature above 530oC in N2 atmosphere.

Synthesis and characterization of novel fluorinated pyridine-based polyimides derived from 4-(4-trifluoromethylphenyl)-2,6-bis(4-aminophenyl)pyridine and dianhydrides

2017 ◽  
Vol 30 (4) ◽  
pp. 500-508 ◽  
Author(s):  
Shui-Xiu Huang ◽  
Xiao-Ling Liu ◽  
Mei-Hong Wei ◽  
Zhen-Zhong Huang ◽  
Shou-Ri Sheng
Keyword(s):  
Room Temperature ◽  
Amic Acid ◽  
Dielectric Constants ◽  
Synthesis And Characterization ◽  
Cutoff Wavelength ◽  
Step Method ◽  
Polar Solvents ◽  
Good Thermal Stability ◽  
Nm Range

A series of new fluorinated pyridine-based polyimides (PIs) was synthesized by polycondensation of 4-(4-trifluoromethylphenyl)-2,6-bis(4-aminophenyl)pyridine with various aromatic dianhydrides in N, N-dimethylacetamide (DMAc) via the conventional two-step method. The inherent viscosities of the resulting poly(amic acid)s and PIs were 0.54–0.94 and 0.58–0.88 dLg−1, respectively. The obtained PIs were predominantly amorphous and soluble in polar solvents such as N-methyl-2-pyrrolidone, N, N-dimethylformamide, and DMAc at room temperature or upon heating at 70°C. They also displayed good thermal stability with the glass transition temperature of 324–416°C, the temperature at 5% weight loss of 546–584°C, and the residue of 58–69% at 750°C under nitrogen, as well as outstanding mechanical properties with tensile strengths of 69132 MPa, tensile moduli of 1.1–2.0 GPa, and elongations at break of 7–27%. Meanwhile, these PI films had dielectric constants of 2.95–3.22 (1 MHz), low water uptake 0.44–0.71%, and high optical transparency with the ultraviolet cutoff wavelength in the 388–406 nm range and the wavelength of 80% transparency in the range of 550–680 nm.

Sign in / Sign up

Export Citation Format

Share Document