Low-Dissipation Thermosets Derived from Oligo(2,6-dimethyl phenylene oxide)-containing Benzoxazines

Poly(2,6-dimethyl phenyl oxide) (PPO) is known for its low dissipation factor. To achieve insulating materials with low dissipation factor for high-frequency communication application, a monomer-type benzoxazine (P-APPO) and a main-chain-type benzoxazine (BPA-APPO) were prepared from an amine end-capped oligo (2,6-dimethyl phenylene oxide) (APPO). The APPO was prepared from a nucleophilic substitution of a phenol-end capped oligo (2,6-dimethyl phenylene oxide) (a commercial product, SA 90) with fluoronitrobenzene, and followed by catalytic hydrogenation. After self-curing or curing with a dicyclopentadiene-phenol epoxy (HP 7200), thermosets with high-Tg and low-dissipation factor can be achieved. Furthermore, the resulting epoxy thermosets show better thermal and dielectric properties than those of epoxy thermoset cured from its precursor SA90, demonstrating it is a successful modification in simultaneously enhancing the thermal and dielectric properties.

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A facile method for the preparation of aliphatic main-chain benzoxazine copolymers with high-frequency low dielectric constants

Polymer Chemistry ◽

10.1039/c8py00407b ◽

2018 ◽

Vol 9 (21) ◽

pp. 2913-2925 ◽

Cited By ~ 27

Author(s):

Ming Zeng ◽

Jiangbing Chen ◽

Qingyu Xu ◽

Yiwan Huang ◽

Zijian Feng ◽

...

Keyword(s):

Dielectric Properties ◽

High Frequency ◽

Main Chain ◽

Polymerization Kinetics ◽

Dielectric Constants ◽

Low Dielectric

The effects of the reaction solvent on the preparation, polymerization kinetics, and high-frequency dielectric properties of aliphatic main-chain benzoxazine copolymers were investigated.

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Low Dielectric Constant and Low Dissipation Factor Material for High-Frequency PCBs

Kobunshi ◽

10.1295/kobunshi.52.571 ◽

2003 ◽

Vol 52 (8) ◽

pp. 571-571

Author(s):

Yasuyuki MIZUNO

Keyword(s):

Dielectric Constant ◽

High Frequency ◽

Dissipation Factor ◽

Low Dielectric Constant ◽

Low Dielectric ◽

Low Dissipation

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Improved circuit for impedance measurement at very high frequency and its application in testing dielectric properties of insulating materials

Review of Scientific Instruments ◽

10.1063/1.1135498 ◽

1978 ◽

Vol 49 (7) ◽

pp. 936-939 ◽

Cited By ~ 8

Author(s):

I. Ogawa ◽

A. Kakimoto

Keyword(s):

Dielectric Properties ◽

High Frequency ◽

Impedance Measurement ◽

Very High Frequency ◽

Insulating Materials ◽

Very High

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Synthesis, polymerization kinetics, and high-frequency dielectric properties of novel main-chain benzoxazine copolymers

Reactive and Functional Polymers ◽

10.1016/j.reactfunctpolym.2017.12.001 ◽

2018 ◽

Vol 122 ◽

pp. 158-166 ◽

Cited By ~ 24

Author(s):

Qingyu Xu ◽

Ming Zeng ◽

Jiangbing Chen ◽

Shengguo Zeng ◽

Yiwan Huang ◽

...

Keyword(s):

Dielectric Properties ◽

High Frequency ◽

Main Chain ◽

Polymerization Kinetics

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The robustness of a thermoset of a main-chain type polybenzoxazine precursor prepared through a strategy of A–A and B–B polycondensation

RSC Advances ◽

10.1039/c5ra25619d ◽

2016 ◽

Vol 6 (22) ◽

pp. 18678-18684 ◽

Cited By ~ 13

Author(s):

Meng Wei Wang ◽

Ru Jong Jeng ◽

Ching Hsuan Lin

Keyword(s):

Molecular Weight ◽

Dielectric Properties ◽

Main Chain ◽

Mannich Condensation ◽

Chain Type

A polybenzoxazine precursor was prepared via an A–A and B–B condensation, with a much higher molecular weight than those prepared by Mannich condensation. After curing, the thermoset shows robustness in thermal, mechanical, and dielectric properties.

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Impact of Conducting Polymer Filler on the Dielectric Properties of Nylon 11

Chemistry & Chemical Technology ◽

10.23939/chcht03.01.047 ◽

2009 ◽

Vol 3 (1) ◽

pp. 47-51

Author(s):

Shilpa Pande ◽

◽

Deepali Kelkar ◽

Dilip Peshwe ◽

◽

...

Keyword(s):

Dielectric Properties ◽

Dielectric Permittivity ◽

Conducting Polymer ◽

High Frequency ◽

Filler Content ◽

Dissipation Factor ◽

Polymer Filler ◽

Wide Range ◽

Conducting Filler ◽

Nylon 11

The dielectric studies of semi-crystalline Nylon 11 filled with a conducting polymer (PANI) were investigated in a wide range of frequency and temperature by using Impedance Analyzer. The main focus was on the effects of conducting filler content on dielectric properties of Nylon 11. The prominent factors such as dielectric permittivity, loss factor, and loss tangent were studied at high frequency. Two different concentrations (1 % and 5 % w/w) of the conducting filler were used. It was observed that with the increase of fillers concentration, the value of dielectric permittivity (ε’)б The dissipation factor (ε’’) and loss (tan ) decrease compared to pure Nylon 11.

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Structural and Electrical Properties of Ca2+ Substituted Pb[(Zr0.52Ti0.48)0,98(Cr3+0.5, Ta5+0.5)0,02]0,96 P0,04 O3 Ceramics

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.87.18 ◽

2014 ◽

Vol 87 ◽

pp. 18-23

Author(s):

Louanes Hamzioui ◽

Fares Kahoul ◽

Ahmed Boutarfaia

Keyword(s):

Dielectric Properties ◽

Electrical Properties ◽

Perovskite Phase ◽

Pyrochlore Phase ◽

Rhombohedral Phase ◽

Dissipation Factor ◽

Sintering Behavior ◽

Practical Applications ◽

Low Dissipation ◽

High Dielectric

Pb1-xCax[(Zr0.52Ti0.48)0,98(Cr3+0.5, Ta5+0.5)0,02]0,96P0,04O3(x = 0,00, 0.02, 0.04, 0.06) ceramics were prepared using the conventional mixed-oxide route. The resultant samples were sintered at different temperatures and subsequently characterized in terms of both microstructure and dielectric properties to study the effects of sintering behavior. X-ray diffraction analysis reveals that all specimens are a pure perovskite phase without pyrochlore phase and exhibits a phase transition from a rhombohedral phase to the coexistence of rhombohedral and tetragonal phases with an increase of sintering temperature. The grain size first increases up tox= 0.02 and then decreases. Comparing with the undoped ceramics, the dielectric properties of the Ca-doped PZT–PCTP specimens are significantly improved. The results show that the ceramics sintered at 1180°C have optimum electrical properties for x= 0.02: a high dielectric constant (εr= 16800) at Tc, a low dissipation factor (tanδ = 0.009) and a low resistivity (ρ= 0.09 ×10+4) (Ω.cm) at 1 kHz, which indicates that the PZT–CCTP ceramics are promising for lead practical applications.

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LTCC and Bulk Zn4B6O13–Zn2SiO4 Composites for Submillimeter Wave Applications

Materials ◽

10.3390/ma14041014 ◽

2021 ◽

Vol 14 (4) ◽

pp. 1014

Author(s):

Dorota Szwagierczak ◽

Beata Synkiewicz-Musialska ◽

Jan Kulawik ◽

Norbert Pałka

Keyword(s):

Dielectric Constant ◽

Dielectric Properties ◽

Dissipation Factor ◽

Submillimeter Wave ◽

Sintering Behavior ◽

High Frequencies ◽

Low Dielectric ◽

Low Dissipation ◽

Temperature Dependences ◽

Very High Frequencies

New zinc metaborate Zn4B6O13–willemite Zn2SiO4 composites were investigated as promising materials for LTCC (low temperature cofired ceramics) substrates of microelectronic circuits for submillimeter wave applications. Composites were prepared as bulk ceramics and LTCC multilayer structures with cofired conductive thick films. The phase composition, crystal structure, microstructure, sintering behavior, and dielectric properties were studied as a function of willemite content (0, 10, 13, 15, 20, 40, 50, 60, 100 wt %). The dielectric properties characterization performed by THz time domain spectroscopy proved the applicability of the composites at very high frequencies. For the 87% Zn4B6O13–13% Zn2SiO4 composite, the best characteristics were obtained, which are suitable for LTCC submillimeter wave applications. These were a low sintering temperature of 930 °C, compatibility with Ag-based conductors, a low dielectric constant (5.8 at 0.15–1.1 THz), a low dissipation factor (0.006 at 1 THz), and weak frequency and temperature dependences of dielectric constant.

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