New photosensitive colorless polyimide-silica hybrid optical materials: Synthesis, properties and patterning

Wang, Yuwen; Chen, Wen‐Chang

doi:10.1016/j.matchemphys.2010.12.039

Cited by 30 publications

(13 citation statements)

References 31 publications

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“…Nowadays, blending polymer composites with inorganic materials has become a prevalent topic in material science because of the suitable properties from both inorganic components (heat resistance, retention of mechanical properties at high temperatures, and good dielectric properties) and organic polymers (toughness, ductility, and processability). [1][2][3][4][5] Being an important class of high-performance polymers, polyimides (PIs) are widely used in the preparation of hybrids owing to their excellent thermal stability, superior mechanical properties, high glass transition temperature (T g ), high volume resistivity, radiation, and chemical resistance. 6,7 These properties make PIs widely applicable in the production of electronic, fiber, adhesive, and film material.…”

Section: Introductionmentioning

confidence: 99%

Mechanical, thermal and dielectric properties of graphene oxide/polyimide resin composite

Liu

Yao

Zhou

2016

High Performance Polymers

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Graphene oxide (GO) sheets have captured the attention of the scientific community because of its excellent performance and applicability. Hence, studying its reinforcing effects on polyimide (PI) resin is an important research topic. In this study, samples of GO-reinforced PI resin were prepared by hot pressing. The effects of GO as nanofiller on the structure and morphology as well as on the mechanical, thermal, and dielectric properties of the GO/PI resin composites were investigated carefully to provide a practical strategy for the use of the polymer-based composites. The GO nanosheets were dispersed uniformly into the PI matrix by ultrasonication, as illustrated by scanning electron microscopic images (SEM). Compared with pure PI, the GO/PI resin composite loaded with 1 wt% GO showed improved tensile strength by 38.9%, flexural strength by 24.8%, and impact strength by 40.7%. Dynamic mechanical analysis test showed that the addition of GO (1 wt%) increased the glass transition temperature by nearly 9.1°C. In addition, the thermal stability and the dielectric constant were also enhanced by adding only a small amount of GO. This approach provides a strategy for developing simple and cost-effective GO-polymer resin composite materials.

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Section: Introductionmentioning

confidence: 99%

Mechanical, thermal and dielectric properties of graphene oxide/polyimide resin composite

Liu

Yao

Zhou

2016

High Performance Polymers

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“…Nowadays, polymer-inorganic hybrid materials become a popular topic in material science because they inherit the suitable properties from both inorganic component (heat resistance, retention of mechanical properties at high temperatures, and low thermal expansion) and those of organic polymer (toughness, ductility, and processability) [1][2][3][4][5]. Polyimides (PIs) as high-performance organic matrix are used in the preparation of hybrids due to having excellent thermal stability with respect to decomposition, good mechanical properties, chemical stability against oxidation, and low dielectric constant.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanosilica on the dielectric properties and thermal stability of polyimide/SiO₂nanohybrid

Babanzadeh

Mehdipour‐Ataei

Mahjoub

2012

Designed Monomers and Polymers

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New polyimide-silica (PI-SiO 2 ) nanohybrids were prepared by the reaction of bis(5-amino-1-naphthoxy) diphenylsilane (5-APS) with commercially available 4,4'-(Hexafluoroisopropylidene) diphthalic anhydride (6-FDA) in the presence of 3-aminopropyl triethoxysilane as a coupling agent and tetraethylorthosilicate (TEOS) as precursor of inorganic network. Hybrid thin films with 5-50 wt.% silica content were synthesized. The prepared PI-SiO 2 films were characterized by Fourier transform infrared spectroscopy and energy dispersive X-ray spectroscopy. The morphology and crystallinity of these hybrid systems were investigated by transmission electron microscopy and XRD analysis. Thermal properties of the nanohybrids were evaluated by thermogravimetric analysis and dynamic mechanical thermal analysis techniques. The optical constants (n and k) and dielectric parameters (e 0 and e 00 ) were calculated from IR reflection spectra by employing the Kramers-Kronig dispersion relations. Under proper condition, the silica particle size was in the range of 50-70 nm for the prepared hybrids. The results showed that presence of silica severely modified the properties of samples.

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“…2,3 Although they are well recognized as a class of thermally stable engineering polymers, they generally have been hard to process due to their infusibility and poor solubility in organic solvents. To overcome these difficulties, several approaches have been investigated in an attempt to improve the solubility of PIs, and the most important of them are the preparation of copolymers such as poly(amide-imide)s (PAIs) and poly(amide-ester-imide)s. [4][5][6][7][8][9][10][11][12] PAIs are the compounds with bulky groups into the polymer backbone or bulky pendant groups seem to be a good balance between thermostability and processability. PAIs are thermally stable and processable compounds which have attracted great attention in the recent past decades, due to their exclusive combination of toughness, lightness, and dimensional stability at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Poly(amide-imide)s obtained from 3,5-diamino-N-(thiazol-2-yl)-benzamide and dicarboxylic acids containing various amino acid units

Mallakpour

Ahmadizadegan

2012

High Performance Polymers

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This study reports a green approach toward the synthesis of novel optically active poly(amide-imide)s (PAI)s bearing thiazole moiety, which was formed by the polycondensation reaction of 3,5-diamino-N-(thiazol-2-yl)benzamide and various diacids containing natural amino acids in molten tetrabutylammonium bromide. Diamine monomer was synthesized by the reduction of 3,5-dinitro-N-(thiazol-2-yl)benzamide in methanol using iron oxide hydroxide as a catalyst. This catalyst can rapidly reduce the sulfur and azo-containing aromatic nitro compounds to the corresponding amines in high yield by employing hydrazine hydrate as a hydrogen donor. Chiral diacid monomers were synthesized in high yield through the reaction of pyromellitic dianhydride and amino acids (L-isoluecine, S-valine, S-methionine, and L-phenylalanine) in acetic acid. The direct polymerization reactions of these monomers provided a series of new optically active PAIs with inherent viscosities in the range of 0.20-0.28 dL g À1 . The obtained polymers were characterized by Fouriertransformed infrared spectroscopy, specific rotation measurements, and the representative of them by proton nuclear magnetic resonance and elemental analysis techniques.

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New photosensitive colorless polyimide-silica hybrid optical materials: Synthesis, properties and patterning

Cited by 30 publications

References 31 publications

Mechanical, thermal and dielectric properties of graphene oxide/polyimide resin composite

Mechanical, thermal and dielectric properties of graphene oxide/polyimide resin composite

Effect of nanosilica on the dielectric properties and thermal stability of polyimide/SiO₂nanohybrid

Poly(amide-imide)s obtained from 3,5-diamino-N-(thiazol-2-yl)-benzamide and dicarboxylic acids containing various amino acid units

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New photosensitive colorless polyimide-silica hybrid optical materials: Synthesis, properties and patterning

Cited by 30 publications

References 31 publications

Mechanical, thermal and dielectric properties of graphene oxide/polyimide resin composite

Mechanical, thermal and dielectric properties of graphene oxide/polyimide resin composite

Effect of nanosilica on the dielectric properties and thermal stability of polyimide/SiO2nanohybrid

Poly(amide-imide)s obtained from 3,5-diamino-N-(thiazol-2-yl)-benzamide and dicarboxylic acids containing various amino acid units

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Effect of nanosilica on the dielectric properties and thermal stability of polyimide/SiO₂nanohybrid