Synthesis, morphology, and melting behavior of poly(ether ether ketone) of different molecular weights

2009 ◽  
Vol 114 (4) ◽  
pp. 2060-2070 ◽  
Author(s):  
Qianshu Lu ◽  
Zhenguo Yang ◽  
Xiaohui Li ◽  
Shilei Jin
Keyword(s):  
Melting Behavior ◽  
Molecular Weights ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone

Processable poly(ether ether ketone imide)s

2021 ◽  
pp. 095400832110550
Author(s):  
Aslam B Tamboli ◽  
Shivaji D Ghodke ◽  
Arati V Diwate ◽  
Makrand D Joshi ◽  
Vijay P Ubale ◽  
...  
Keyword(s):  
Weight Loss ◽  
Organic Solvents ◽  
Amic Acid ◽  
Good Thermal Stability ◽  
Molecular Weights ◽  
Good Solubility ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Tetracarboxylic Dianhydride

New aromatic poly(ether ether ketone imide)s, [PEEKimide]s, were synthesized successfully from 1,3-bis-4′-(4″-aminophenoxy benzoyl) benzene and various commercially available aromatic dianhydrides, such as pyromellitic dianhydride (PMDA), 3,3′,4,4′-benzophenone tetracarboxylic dianhydride (BTDA), 3,3′,4,4′-biphenyl tetracarboxylic dianhydride (BPDA), 4,4′-oxydiphthalic anhydride (OPDA) and 4,4′-(hexafluro isoproylidene) diphthalic anhydride (HFDA), by two step polycondensation method. These PEEKimides were characterized by FT-IR, solubility in organic solvents, inherent viscosity, DSC, TGA and WXRD. Inherent viscosities of the precursor poly(ether ether ketone amic acid)s were in the range of 0.23–0.40 dl/g in DMF, indicating formation of moderate to high molecular weights. These poly(ether ether ketone imide)s showed good solubility in polar aprotic solvents such as N,N-dimethylacetamide (DMAc), N-methyl 2-pyrrolidone (NMP), N,N-dimethylformamide (DMF) and dimethyl sulphoxide (DMSO) and had glass transition temperatures in the range 245–279°C. Poly(ether ether ketone imide)s showed no weight loss below 280°C; temperatures for 10% weight loss (T10) were in the range of 406–483°C and char yields at 800°C were 17–34%, indicating their good thermal stability. All these poly(ether ether ketone imide)s were amorphous in nature, as per patterns of WXRD which exhibited diffuse broad halos at (2θ = 10–30°) and amorphous nature was reflected in polymer’s good solubility in common organic solvents.

Effects and properties of poly(arylene ether benzonitrile)s of various molecular weights blended with sulfonated poly(ether ether ketone)

2007 ◽  
Vol 107 (5) ◽  
pp. 3236-3243
Author(s):  
Han-Lang Wu ◽  
Chen-Chi M. Ma ◽  
Chun-Chieh Lin ◽  
Yie-Chan Chiu ◽  
Chih-Yuan Chen ◽  
...  
Keyword(s):  
Molecular Weights ◽  
Arylene Ether ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Sulfonated Poly

On the double-melting behavior of poly(ether ether ketone)

1989 ◽  
Vol 22 (4) ◽  
pp. 1756-1760 ◽  
Author(s):  
Youngchul Lee ◽  
Roger S. Porter ◽  
J. S. Lin
Keyword(s):  
Melting Behavior ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone

Synthesis and properties of novel poly(ether ether ketone) copolymers with (3,5-ditrifluoromethyl)phenyl and (4-phenoxy)phenyl side groups

2011 ◽  
Vol 23 (7) ◽  
pp. 506-512 ◽  
Author(s):  
Jianxin Mu ◽  
Yan Wang ◽  
Leilei Shi ◽  
Kirill Vertogradskiy ◽  
Zhenhua Jiang
Keyword(s):  
Near Infrared ◽  
Nucleophilic Aromatic Substitution ◽  
Synthesis Process ◽  
Feed Ratio ◽  
Aromatic Substitution ◽  
Molecular Weights ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Molar Feed Ratio ◽  
Ether Ketone

A new nonfluorinated bisphenol monomer 2-(4-phenoxyphenyl)-1,4-diphenol was prepared via a four-step synthesis process. A series of poly(ether ether ketone) copolymers (6FPOP-PEEKs) were derived from 4,4′-difluorobenzophenone via a nucleophilic aromatic substitution polycondensation with various molar feed ratios of bisphenol monomer, 2-(4-phenoxyphenyl)-1,4-diphenol to (3,5-ditrifluoromethyl)phenylhydroquinone. The molecular weights ( Mn values), polydispersities and Tg values of 6FPOP-PEEKs increase as the molar feed ratio of 6FPH/(6FPH+POPH) increases. These 6FPOP-PEEKs show very high thermal stability. At a wavelength of 1550 nm, the refractive indices of the 6FPOP-PEEKs films are in the range of 1.5992–1.6396 and birefringences are in the range of 0.0034–0.0043. The near-infrared spectra show that the 6FPOP-PEEK films have small light absorption at the telecommunication wavelengths of 1300 and 1550 nm.

Double-melting behavior of poly(ether ether ketone)

1987 ◽  
Vol 20 (6) ◽  
pp. 1336-1341 ◽  
Author(s):  
Youngchul Lee ◽  
Roger S. Porter
Keyword(s):  
Melting Behavior ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone
Sign in / Sign up

Export Citation Format

Share Document