Study on side‐chain second‐order nonlinear optical polyimides based on novel chromophore‐containing diamines. II. Copolyimides possessing direct photolithographic features

Sui, Yanping; Lu, Jiong; Yin, Jie; Liu, Yangang; Zhu, Zhiwei; Wang, Zongguang

doi:10.1002/pola.1118

Cited by 4 publications

(2 citation statements)

References 42 publications

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“…The good dimensional stability of NLO polymers is crucial to the compatibility of high‐quality optical device fabrication techniques with semiconductor electronics and makes possible significant progress in optoelectronic integration. Furthermore, photocrosslinking offers potential processing advantages such as photopatterning, providing a much simplified photolithographic process for fabricating channel wave guides 37, 39…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of photocrosslinkable, side‐chain, second‐order nonlinear optical poly(ester imide)s with great film‐forming ability and long‐term dipole orientation stability

Yin

2002

J. Polym. Sci. A Polym. Chem.

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A series of photocrosslinkable, side-chain, second-order nonlinear optical (NLO) poly(ester imide)s (PEIs) based on a chromophore-containing dianhydride, 2,2Ј-{4-[(4-nitrophenyl)-azo]phenyl}iminobis(ethyl benzene-1,2-dicarboxylic acid anhydride-4-carboxylate), benzophenone-3,3Ј,4,4Ј-tetracarboxylic dianhydride, and 4,4Ј-diamino-3,3Ј-dimethyl diphenylmethane were prepared. The resulting PEIs exhibited many useful physical characteristics, such as good organosolubility, excellent film-forming properties, high glass-transition temperatures (186 -229°C), and high thermal decomposition temperatures. The electrooptic coefficient value of PEI3 at 650 nm was 11.5 pm/V, and high long-term stability of the NLO chromophore alignment in the poled PEI3 film at 120°C was observed. The temporal stability of the dipole orientation at 150°C was further enhanced by ultraviolet irradiation because of photocrosslinking.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of photocrosslinkable, side‐chain, second‐order nonlinear optical poly(ester imide)s with great film‐forming ability and long‐term dipole orientation stability

Yin

2002

J. Polym. Sci. A Polym. Chem.

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“…Therefore, there is still a very strong need to improve thermal stability and transparency of these materials in order to fulfill the requirements for long-term device operation and substitute the NLO inorganic materials.Many researchers such as Dalton t64] have been concentrating on how to improve the thermal stability and transparency of the NLO polymer. Since chromophores were firstly incorporated into polyimide, researchers have focused their attention on this material because it possesses long-term stability[9,127,144,154]. In past decades, much more attention has been given to side-chain NLO polyimides as they can overcome some disadvantages of guest-host polymers and improve some properties such as thermal stability[145,[149][150]153].…”

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confidence: 99%

Synthesis and characterization of novel nonlinear optical polyimide

Ren¹

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Nonlinear optical (NLO) polymers have attracted extensive attention because of their potential applications in integrated optical devices such as optical switching, frequency conversion and high-speed electro-optic (EO) devices. However, the stability and optical loss of currently used polymers limit their applications. It is very important to develop NLO polymers with better transparency and higher stability without sacrificing other properties. This study focused on the development of new side-chain NLO polyimides based on the novel fluoronitroaryl diaminoazobenzene chromophores and polyimide/silicon composites. The effects of the fluorine and the fluorine position in the chromophores on the structures and properties of the chromophores and polyimides were studied. The influences of the silicon network on the properties of the composite films were also investigated. Two novel fluorinated diaminoazobenzene chromophore monomers and their nonfluorinated analogues, which can be used for synthesis of side-chain NLO polyimide, were successfully synthesized. The new fluorinated diaminoazobenzene chromophore monomers have very good thermal stability and large hyperpolarizability. It was found that the incorporation of fluorine into the chromophore can lead to higher thermal stability. The fluorine position can lead to the different maximum absorption wavelength Xmax and thermal stability. Three series of novel NLO polyimides based on the fluorinated diaminoazobenzene chromophores and their analogue were successfully synthesized. All NLO polyimides possess high thermal stability, excellent transparency (km^: 298.5-355 nm) and large xix

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Synthesis and characterization of highly fluorescent polythiophene derivatives containing polystyrene sidearms

Shen

Tsuchiya

Oginö

2007

J. Polym. Sci. A Polym. Chem.

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In this study, macroinitiators with different content of atom‐transfer radical polymerization (ATRP) functional group on polythiophene backbone were first prepared by the copolymerization of 3‐[1‐ethyl‐2‐(2‐bromopropionate)]thiophene and 3‐hexylthiophene with various feed ratio. Then poly [3‐hexyl‐2,5‐thienylene‐co‐3‐[1‐ ethyl‐2‐(2‐[poly(styrene)]propionate)]‐2,5‐thienylene] (PTTBr‐PS) with different graft density were obtained by ATRP of styrene from these macroinitiators in anisole. The degree of polymerization of PS sidearm (DPPS) was controlled by polymerization time. The structures of obtained graft copolymers were characterized by gel permeation chromatography (GPC), nuclear magnetic resonance (1H NMR) and differential scanning calorimetry (DSC). Introduction of the PS sidearms onto the backbone of polythiophene was an attempt to trap the polythiophene backbone in a “solution‐like” conformation, thus inhibit the packing of polythiophene backbone and result in the improvement of fluorescent property in solid state. This was verified by the UV–vis and fluorescence analyses. Besides, it was also found that the optical property of PTTBr‐PS graft copolymer was dominated by its graft density and independent on the degree of polymerization of its PS sidearm. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 1003–1013, 2008

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Study on side‐chain second‐order nonlinear optical polyimides based on novel chromophore‐containing diamines. II. Copolyimides possessing direct photolithographic features

Cited by 4 publications

References 42 publications

Synthesis and characterization of photocrosslinkable, side‐chain, second‐order nonlinear optical poly(ester imide)s with great film‐forming ability and long‐term dipole orientation stability

Synthesis and characterization of photocrosslinkable, side‐chain, second‐order nonlinear optical poly(ester imide)s with great film‐forming ability and long‐term dipole orientation stability

Synthesis and characterization of novel nonlinear optical polyimide

Synthesis and characterization of highly fluorescent polythiophene derivatives containing polystyrene sidearms

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