A novel hybrid catalyst system and its effects on the curing, thermal, and dielectric properties of cyanate ester

2011 ◽  
Vol 51 (11) ◽  
pp. 2236-2244 ◽  
Author(s):  
Shankai Dai ◽  
Dongxian Zhuo ◽  
Aijuan Gu ◽  
Guozheng Liang ◽  
Li Yuan
Keyword(s):  
Dielectric Properties ◽  
Catalyst System ◽  
Cyanate Ester ◽  
Hybrid Catalyst

An in situ (K0.5Na0.5)NbO3-doped barium titanate foam framework and its cyanate ester resin composites with temperature-stable dielectric properties and low dielectric loss

2019 ◽  
Vol 3 (4) ◽  
pp. 726-736 ◽  
Author(s):  
Longhui Zheng ◽  
Li Yuan ◽  
Guozheng Liang ◽  
Aijuan Gu
Keyword(s):  
Dielectric Properties ◽  
Dielectric Loss ◽  
Barium Titanate ◽  
Cyanate Ester ◽  
Resin Composites ◽  
Cyanate Ester Resin ◽  
Low Dielectric ◽  
Doped Barium Titanate

High-k composites with temperature-stable dielectric properties and low dielectric loss obtained through building a network with in situ-doped barium titanate foam.

Curing behaviors of cyanate ester/epoxy copolymers and their dielectric properties

2016 ◽  
Vol 29 (10) ◽  
pp. 1175-1184 ◽  
Author(s):  
Yangxue Lei ◽  
Mingzhen Xu ◽  
Mingli Jiang ◽  
Yumin Huang ◽  
Xiaobo Liu
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Decomposition ◽  
Fourier Transform ◽  
Dielectric Properties ◽  
Small Extent ◽  
Dielectric Constants ◽  
Cyanate Ester ◽  
Scanning Calorimetry ◽  
Peak Fitting ◽  
Curing Kinetic

The curing behavior and dielectric properties of cyanate ester/epoxy (EP) with a latent initiator imidazole was investigated as a function of blend composition. Differential scanning calorimetry (DSC) was used to investigate the dynamic cure behavior of the blends. Multiheating rate DSC, peak fitting, and iso-conversion method were applied to analyze the curing kinetic parameters. Two distinct peaks were fitted from the dynamic DSC curve and the activation energies of each reaction varied with the increase of curing degrees. Fourier transform infrared spectra revealed that several reactions coexisted during the curing processes of cyanate and EP, resulting in the coexistence of the polymers and copolymers in the final composites. The dielectric properties of the composites were studied and the phenomenon that the dielectric constants for all of the composites are independent of frequency was observed. The thermal decomposition characteristics of the blends were investigated using thermogravimetric analysis. By increasing the content of EP, the thermal properties of the cured blends were improved to a small extent, while the char yield markedly decreased.

scholarly journals Thermal conductivity and dielectric properties of bismaleimide/cyanate ester copolymer

High Voltage ◽  
2017 ◽  
Vol 2 (3) ◽  
pp. 167-171 ◽  
Author(s):  
Lin Wan ◽  
Xia Zhang ◽  
Guanglei Wu ◽  
Ailing Feng
Keyword(s):  
Thermal Conductivity ◽  
Dielectric Properties ◽  
Cyanate Ester

Preparation and Dielectric Properties of POSS-NH2/Cyanate Ester Resin Organic-Inorganic Hybrids

2011 ◽  
Vol 216 ◽  
pp. 635-639 ◽  
Author(s):  
Zeng Ping Zhang ◽  
Jian Zhong Pei ◽  
Shuan Fa Chen ◽  
Hong Zhao Du ◽  
Yong Wen
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Cyanate Ester ◽  
Cyanate Ester Resin ◽  
Curing Reaction ◽  
Ft Ir ◽  
Different Content

In order to improve the dielectric and overal properties of cyanate ester (CE) resin, a functional POSS monomer(octa(aminopropyl)silsesquioxane, POSS-NH2), was employed to modify CE. A series of POSS-NH2/CE hybrids (CE, CE1, CE2, CE3 and CE4) containing different content of POSS have been prepared by melt casting and then curing. The curing reaction of the resin systems were monitored by FT-IR. Dielectric properties of the hybrids were investigated in detail. FT-IR results showed the almost disappearance of the –OCN for all resin systems, suggesting the complete curing of CE using the experimental curing technique. Dielectric investigation indicates that CE1 which contains 1 wt% of POSS has the best dielectric properties with not only lowest dielectric constant but also lowest dielectric loss.

Selective Synthesis of Ethylene from Synthesis Gas over Hybrid Catalyst System

1986 ◽  
Vol 15 (8) ◽  
pp. 1341-1342 ◽  
Author(s):  
Hironori Arakawa ◽  
Yoshimichi Kiyozumi ◽  
Kunio Suzuki ◽  
Kazuhiko Takeuchi ◽  
Takehiko Matsuzaki ◽  
...  
Keyword(s):  
Synthesis Gas ◽  
Catalyst System ◽  
Selective Synthesis ◽  
Hybrid Catalyst
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