Thermal imidization of fluorinated poly(amic acid) precursors on a glycidyl methacrylate graft-polymerized Si(100) surface

2001 ◽  
Vol 19 (2) ◽  
pp. 547-556 ◽  
Author(s):  
Yan Zhang ◽  
K. L. Tan ◽  
B. Y. Liaw ◽  
D. J. Liaw ◽  
E. T. Kang ◽  
...  
Keyword(s):  
Glycidyl Methacrylate ◽  
Amic Acid ◽  
Thermal Imidization

Thermal Imidization of Fluorinated Poly(amic acid)s on Si(100) Surfaces Modified by Plasma Polymerization and Deposition of Glycidyl Methacrylate

Langmuir ◽  
2001 ◽  
Vol 17 (7) ◽  
pp. 2265-2274 ◽  
Author(s):  
Yan Zhang ◽  
K. L. Tan ◽  
B. Y. Liaw ◽  
D. J. Liaw ◽  
E. T. Kang ◽  
...  
Keyword(s):  
Glycidyl Methacrylate ◽  
Plasma Polymerization ◽  
Amic Acid ◽  
Thermal Imidization

Thermal imidization of poly(amic acid) precursors on glycidyl methacrylate (GMA) graft-polymerized Si(100) surface

2000 ◽  
Vol 374 (1) ◽  
pp. 70-79 ◽  
Author(s):  
Yan Zhang ◽  
K.L Tan ◽  
B.Y Liaw ◽  
D.J Liaw ◽  
E.T Kang
Keyword(s):  
Glycidyl Methacrylate ◽  
Amic Acid ◽  
Thermal Imidization

Thermal imidization of poly(amic acid) on Si(100) surface modified by plasma polymerization of glycidyl methacrylate

2000 ◽  
Vol 14 (13) ◽  
pp. 1723-1744 ◽  
Author(s):  
Yan Zhang ◽  
K. L. Tan ◽  
G. H. Yang ◽  
X. P. Zou ◽  
E. T. Kang ◽  
...  
Keyword(s):  
Glycidyl Methacrylate ◽  
Plasma Polymerization ◽  
Amic Acid ◽  
Thermal Imidization ◽  
Surface Modified

scholarly journals Colorless and Transparent Copolyimides and Their Nanocomposites: Thermo-Optical Properties, Morphologies, and Gas Permeabilities

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 585 ◽  
Author(s):  
Hyeon Shin ◽  
Young-Je Kwark ◽  
Jin-Hae Chang
Keyword(s):  
Optical Properties ◽  
Coefficient Of Thermal Expansion ◽  
Amic Acid ◽  
Gas Permeation ◽  
Molar Ratio ◽  
Molar Ratios ◽  
Thermal Imidization ◽  
Organically Modified ◽  
Permeation Properties

A series of linear aromatic copolyimides (Co-PIs) were synthesized by reacting 4,4′-biphthalic anhydride (BPA) with various molar contents of 2,2′-bis(trifluoromethyl)benzidine (TFB) and p-xylylenediamine (p-XDA) in N,N′-dimethylacetamide (DMAc). Co-PI films were fabricated by solution casting and thermal imidization with poly(amic acid) (PAA) on glass plates. The thermo-optical properties and gas permeabilities of Co-PI films composed of various molar ratios of p-XDA (0.2–1.0 relative to BPA) were investigated. Thermal properties were observed to deteriorate with increasing p-XDA concentration. However, oxygen-transmission rates (O2TRs) and optical transparencies improved with increasing p-XDA concentration. Co-PI hybrids with a 1:0.2:0.8 molar ratio of BPA:TFB:p-XDA and organically modified hectorite (STN) were prepared by the in situ intercalation method. The morphologies and the thermo-optical and gas permeation properties of the hybrids were examined as functions of STN loading (5–50 wt %). XRD and TEM revealed substantial increases in clay particle agglomeration in the Co-PI hybrid films as the clay loading was increased from 5 to 50 wt %. The coefficient of thermal expansion (CTE) and the O2TR of a Co-PI hybrid film were observed to improve with increasing STN concentration; however, its optical transparency decreased gradually with increasing STN concentration.

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%.

scholarly journals Reactivity of Poly(amic acid) Isomers in Thermal Imidization

1990 ◽  
Vol 22 (8) ◽  
pp. 725-732 ◽  
Author(s):  
Ning-Jo Chu ◽  
Jiann-Wen Huang
Keyword(s):  
Amic Acid ◽  
Thermal Imidization

Effect of thermal imidization and curing on fluorescence behavior of a phenylethynyl-terminated poly(amic acid)

2003 ◽  
Vol 11 (5) ◽  
pp. 297-302 ◽  
Author(s):  
Donghwan Cho ◽  
Gyeongmo Yang ◽  
Lawrence T. Drzal
Keyword(s):  
Amic Acid ◽  
Thermal Imidization
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