Electro‐optic side‐chain polyimide system with large optical nonlinearity and high thermal stability

1994 ◽  
Vol 64 (17) ◽  
pp. 2197-2199 ◽  
Author(s):  
Wataru Sotoyama ◽  
Satoshi Tatsuura ◽  
Tetsuzo Yoshimura
Keyword(s):  
Thermal Stability ◽  
Optical Nonlinearity ◽  
High Thermal Stability ◽  
Side Chain ◽  
Electro Optic

Dielectric Relaxation Spectroscopic Measurements on a Novel Electroactive Polyimide

1999 ◽  
Vol 600 ◽  
Author(s):  
Saadi Abdul Jawad ◽  
Abdalla Alnajjar ◽  
Mamoun M. Bader
Keyword(s):  
Activation Energy ◽  
Thermal Stability ◽  
Dielectric Constant ◽  
Electric Modulus ◽  
High Thermal Stability ◽  
Side Chain ◽  
Electrical Behavior ◽  
Frequency Range ◽  
Kcal Mole ◽  
Electro Optic

AbstractAC electrical behavior of a novel aromatic electro-optic polyimide was investigated in the temperature range 25 °C to 300 °C and a frequency range from 1 Hz to 106 Hz. Three electrical quantities: impedance, permittivity and electric modulus are reported. The dependence of imaginary and real components of these quantities on temperature and frequency are discussed. The experimental results show that the polymer has high thermal stability below 200 °C, where the resistivity, dielectric constant and permittivity are nearly temperature-independent indicating highly rigid structure. Above this temperature, however, a well-defined broad peak corresponding to a relaxation process was observed for which the activation energy was calculated to be 8.5 Kcal/mole. This relaxation is associated with a restricted local rotational motion of the side chain chromophore.

Nlo Polymer Material Systems for Electro-Optic Devices

1995 ◽  
Vol 413 ◽  
Author(s):  
J. T. Kenney ◽  
J. C. Nurse ◽  
J. C. Chon ◽  
E. S. Binidey ◽  
M. Stiller ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Communication Systems ◽  
High Speed ◽  
High Thermal Stability ◽  
Side Chain ◽  
Electronic Systems ◽  
Material System ◽  
Electro Optic ◽  
Non Linear ◽  
Linear Optical

ABSTRACTNon linear optical (NLO) polymers have great potential to be fabricated into integrated electro-optic (E/O) devices for use as high speed electro-optic (E/O) switches, modulators and interconnects in computer and communication systems [1,2]. The fabrication of practical integrated E/O devices requires a material system that meets the final device requirements and can be processed using standard fabrication technologies [3]. Applications of polymer E/O devices in electronic systems have been limited by the relatively low thermal stability and poor processability of non linear optical (NLO) polymers. This paper describes a thermally stable electro-optic material system and the fabrication process to make compact integrated E/O devices for application in electronic systems. This material system consists of high thermal stability polyimide core and cladding materials. The active NLO material is a side chain polyimide that uses a new high activity and high thermal stability chromophore.

Electro-optical and pyroelectrical thermal analysis of novel nonlinear optical side-chain polymers with high thermal stability

1994 ◽  
Author(s):  
Reimund Gerhard-Multhaupt ◽  
Stefan Bauer ◽  
Wolf-Dietrich Molzow ◽  
W. Ren ◽  
Werner Wirges ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Analysis ◽  
Nonlinear Optical ◽  
High Thermal Stability ◽  
Side Chain

New Host-Guest Polymeric System for Thermal Stability Enhancement of Electro Optic Effect

2002 ◽  
Vol 725 ◽  
Author(s):  
Seung Koo Park ◽  
Jung Yun Do ◽  
Jung-Jin Ju ◽  
Suntak Park ◽  
Myung-Hyun Lee
Keyword(s):  
Thermal Stability ◽  
Model Compound ◽  
Main Chain ◽  
Side Chain ◽  
Hydroxyl Groups ◽  
New Host ◽  
Polymer Main Chain ◽  
Electro Optic ◽  
Chromophore Concentration ◽  
Stability Enhancement

AbstractA new host-guest electro optic (EO) polymer, in which a chromophore can be reacted with the polymer main chain during poling to give the corresponding side-chain EO polymer, has been prepared for improving EO effect and its thermal stability. Polyisoimide (PII) synthesized from 2, 2-bis (4-aminophenyl) hexafluoropropane and oxydiphthalic anhydride and Disperse Red 1 (DR1) were used as a host and a guest, respectively. A model compound reaction and Infrared spectra of the host-guest film after annealing at various temperatures show that the reaction between the isoimide groups in PII and the hydroxyl groups in DR1 occurs around 140 °C. The glass transition temperatures of the resulting EO polyamic aicd ester-imide copolymer with 0, 10, 20 and 30 wt. % of chromophore concentration were 275, 219, 160, and 124 °C, respectively. The EO coefficient obtained at a wavelength of 1.55 νm was 5.3 and 10.5 pm/V from the EO polymer film with 20 and 30 wt. % DR1. The EO signals exhibited only a slight decay at high temperature due to the chemical reaction between the host and guest during poling.

Synthesis and Optical Nonlinearity of Thermally Stable Polyimides Incorporated with Electro-Optic Chromophore as Side Chain

2007 ◽  
Vol 249-250 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Hyun Kyung Ju ◽  
Jong Sun Lim ◽  
Sung Cheol Yoon ◽  
Changjin Lee ◽  
Dong Hoon Choi ◽  
...  
Keyword(s):  
Optical Nonlinearity ◽  
Side Chain ◽  
Thermally Stable ◽  
Electro Optic

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.

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