Increased thermal stability of a poled electro-optic polymer using high-molar-mass fractions

2004 ◽  
Vol 70 (4) ◽  
Author(s):  
Ralph P. Bertram ◽  
Nils Benter ◽  
Dirk Apitz ◽  
Elisabeth Soergel ◽  
Karsten Buse ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Molar Mass ◽  
High Molar Mass ◽  
Electro Optic ◽  
Mass Fractions ◽  
Thermal Stability Of

Effect of layered silicates on rheological and mechanical properties and thermal stability of high-molar mass polydimethylsiloxane matrix

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Veronika Rabova ◽  
Petr Hron
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Silicone Rubber ◽  
Molar Mass ◽  
Strength Increase ◽  
Weight Decay ◽  
High Molar Mass ◽  
Surface Modified ◽  
Thermal Stability Of

AbstractThe effect of surface modified fillers based on montmorillonite on rheological and mechanical properties and thermal stability of high-molar mass polydimethylsiloxane matrix was evaluated. Silicone rubber/clay composites were prepared via homogenisation on open two roll-mill followed by torque measurement at two different temperatures. At 30 °C and 100 °C the torque did not extremely differ excepting the mixtures containing Cloisite 15A where it achieved the maximum at 3 phr montmorillonite content, but the tensile strength reached the similar values in all mixtures. Thermogravimetric analysis was utilized to find out the differences in weight decay of composites in silicone rubber/montmorillonite mixtures and in unfilled silicone rubber. Synergism of fillers was also studied and led to tensile strength increase.

Organic solvent-free synthesis of phosphorus-containing polymers

2007 ◽  
Vol 79 (11) ◽  
pp. 1879-1884 ◽  
Author(s):  
Smaranda Iliescu ◽  
Gheorghe Ilia ◽  
Aurelia Pascariu ◽  
Adriana Popa ◽  
Nicoleta Plesu
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Bisphenol A ◽  
Organic Solvent ◽  
Molar Mass ◽  
Interfacial Polycondensation ◽  
H Nmr ◽  
Phosphorus Containing ◽  
Solvent Free Synthesis ◽  
Thermal Stability Of

Direct, efficient, organic solvent- and catalyst-free synthesis of a series of polyphosphates was accomplished. The reaction involved a gas-liquid interfacial polycondensation between arylphosphoric dichlorides and bisphenol A. The polyphosphates were characterized by IR, 1H NMR, 31P NMR, inherent viscosity, thermal analysis, and molar mass. Yields in the range 70-90 % and inherent viscosities in the range 0.30-0.40 dl/g were obtained. The thermal stability of the polyphosphates was investigated by using thermogravimetry.

Hydrogen-bonded network: An effective approach to improve the thermal stability of organic/polymer electro-optic materials

2012 ◽  
Vol 56 (2) ◽  
pp. 169-173 ◽  
Author(s):  
GuoWei Deng ◽  
ShuHui Bo ◽  
TingTing Zhou ◽  
Rong Zhang ◽  
JiaLei Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Organic Polymer ◽  
Electro Optic ◽  
Thermal Stability Of ◽  
Hydrogen Bonded

Evaluation of Thermal Stability of Organic Electro-Optic Device by Using Thermally Stimulated Current

2016 ◽  
Vol 16 (4) ◽  
pp. 3378-3382 ◽  
Author(s):  
Ryoma Ikemoto ◽  
Dai Taguchi ◽  
Takaaki Manaka ◽  
Mitsumasa Iwamoto ◽  
Toshiki Yamada ◽  
...  
Keyword(s):  
Activation Energy ◽  
Thermal Stability ◽  
Life Time ◽  
Side Chain ◽  
Dominant Contribution ◽  
Thermally Stimulated Current ◽  
Chain Polymer ◽  
Electro Optic ◽  
Thermal Stability Of ◽  
Host Polymer

Thermally stimulated current (TSC) measurement was employed to study the thermal stability of electro-optic (EO) polymers, i.e., guest/host polymer DR1/PMMA and side-chain polymer PMMA-co-DR1. Here the isothermal relaxation test showed that the relaxation time τ (85 °C) of side-chain polymer PMMA-co-DR1 is longer than that of guest/host polymer DR1/PMMA. TSC peaks appeared symmetrically in proportion to the poling electric field Ep, indicating that DR1 molecules make a dominant contribution to dipolar depolarization. Thermal sampling (TS) method showed that the activation energy of the DR1/PMMA is around 1 eV, while that of the PMMA-co-DR1 is distributed > 1 eV. Results suggested that side-chain polymer is preferable to the guest/host polymer in the thermal stability. TSC measurement is helpful as a conventional method for studying the life time of EO polymers in terms of dipolar motion.

Thermal stability of electro‐optic response in poled polyimide systems

1991 ◽  
Vol 58 (3) ◽  
pp. 225-227 ◽  
Author(s):  
J. W. Wu ◽  
J. F. Valley ◽  
S. Ermer ◽  
E. S. Binkley ◽  
J. T. Kenney ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Electro Optic ◽  
Thermal Stability Of
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