Blends of polycarbonate and poly(hexamethylene sebacate): IV. Polymer blend intrinsic viscosity behavior and its relationship to solid-state blend compatibility

1990 ◽  
Vol 22 (1) ◽  
pp. 11-17 ◽  
Author(s):  
K. S. Shih ◽  
C. L. Beatty
Keyword(s):  
Solid State ◽  
Intrinsic Viscosity ◽  
Polymer Blend ◽  
Viscosity Behavior

scholarly journals Solid-State Polymerization of Poly(Ethylene Furanoate) Biobased Polyester, III: Extended Study on Effect of Catalyst Type on Molecular Weight Increase

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 438 ◽  
Author(s):  
Yosra Chebbi ◽  
Nejib Kasmi ◽  
Mustapha Majdoub ◽  
George Papageorgiou ◽  
Dimitris Achilias ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Thermal Properties ◽  
Solid State ◽  
Intrinsic Viscosity ◽  
Weight Increase ◽  
Degree Of Crystallinity ◽  
Solid State Polymerization ◽  
End Groups ◽  
Poly Ethylene ◽  
Molecular Weight Increase

In this study, the synthesis of poly(ethylene furanoate) (PEF), catalyzed by five different catalysts—antimony acetate (III) (Sb Ac), zirconium (IV) isopropoxide isopropanal (Zr Is Ip), antimony (III) oxide (Sb Ox), zirconium (IV) 2,4-pentanedionate (Zr Pe) and germanium (IV) oxide (Ge Ox)—via an industrially common combination of melt polymerization and subsequent solid-state polymerization (SSP) is presented. In all reactions, proper amounts of 2,5-dimethylfuran-dicarboxylate (DMFD) and ethylene glycol (EG) in a molar ratio of DMFD/EG= 1/2 and 400 ppm of catalyst were used. Polyester samples were subjected to SSP procedure, under vacuum application, at different reaction times (1, 2, 3.5, and 5 h) and temperatures of 190, 200, and 205 °C. Carboxyl end-groups concentration (–COOH), intrinsic viscosity (IV), and thermal properties, via differential scanning calorimetry (DSC), were measured for all resultant polymers to study the effect of the used catalysts on the molecular weight increase of PEF during SSP process. As was expected, it was found that with increasing the SSP time and temperature, the intrinsic viscosity and the average molecular weight of PEF steadily increased. In contrast, the number of carboxyl end-groups content showed the opposite trend as intrinsic viscosity, that is, gradually decreasing during SSP time and temperature increase. It is worthy to note that thanks to the SSP process an obvious and continuous enhancement in the thermal properties of the prepared PEF samples was attained, in which their melting temperatures (Tm) and degree of crystallinity (Xc) increase progressively with increasing of reaction time and temperature. To predict the time evolution of polymers IV, as well as the hydroxyl and carboxyl content of PEF polyesters during the SSP, a simple kinetic model was developed. From both the theoretical simulation results and the experimental measurements, it was demonstrated that surely the Zr Is Ip catalyst shows the best catalytic characteristics compared to all other used catalysts herein, that is, leading in reducing—in a spectacular way—the activation energy of the involved both transesterification and esterification reactions during SSP.

Optimized Performance of Quasi-Solid-State DSSC with PEO-Bismaleimide Polymer Blend Electrolytes Filled with a Novel Procedure

2014 ◽  
Vol 14 (12) ◽  
pp. 9377-9382 ◽  
Author(s):  
Dong Ha Lee ◽  
Kyung Chul Sun ◽  
Muhammad Bilal Qadir ◽  
Sung Hoon Jeong
Keyword(s):  
Solid State ◽  
Polymer Blend

Nanoheterogeneity of a Polymer Blend and the Effect of Humidity as Characterized by Solid-State NMR

2008 ◽  
Vol 20 (1) ◽  
pp. 287-293 ◽  
Author(s):  
Stuart A. Brewer ◽  
David C. Apperley ◽  
Corinne A. Stone
Keyword(s):  
Solid State ◽  
Polymer Blend ◽  
Solid State Nmr

Study of impedance and solid-state double-layer capacitor behavior of proton (H+)-conducting polymer blend electrolyte-based CS:PS polymers

Ionics ◽  
2020 ◽  
Vol 26 (9) ◽  
pp. 4635-4649 ◽  
Author(s):  
Shujahadeen B. Aziz ◽  
M. H. Hamsan ◽  
Wrya O. Karim ◽  
Ayub Sh. Marif ◽  
Rebar T. Abdulwahid ◽  
...  
Keyword(s):  
Solid State ◽  
Conducting Polymer ◽  
Double Layer ◽  
Polymer Blend ◽  
Double Layer Capacitor ◽  
Polymer Blend Electrolyte

scholarly journals Late Stages of Phase Separation in a Binary Polymer Blend Studied by Rheology, Optical and Electron Microscopy, and Solid State NMR

1997 ◽  
Vol 30 (15) ◽  
pp. 4470-4480 ◽  
Author(s):  
Ioannis S. Polios ◽  
Maria Soliman ◽  
Chin Lee ◽  
Samuel P. Gido ◽  
Klaus Schmidt-Rohr ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Phase Separation ◽  
Solid State ◽  
Polymer Blend ◽  
Solid State Nmr ◽  
Optical And Electron Microscopy ◽  
Binary Polymer ◽  
Late Stages
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