Preparation of novel low-κ polyimide fibers with simultaneously excellent mechanical properties, UV-resistance and surface activity using chemically bonded hyperbranched polysiloxane

2018 ◽  
Vol 6 (5) ◽  
pp. 1229-1238 ◽  
Author(s):  
Cairan Yang ◽  
Jie Dong ◽  
Yuting Fang ◽  
Lixiang Ma ◽  
Xin Zhao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Activity ◽  
High Strength ◽  
Dielectric Constants ◽  
Uv Resistance ◽  
High Modulus ◽  
Low Dielectric ◽  
Polyimide Fibers ◽  
Hyperbranched Polysiloxane ◽  
Transparent Composites

High-strength and high-modulus fibers with low dielectric constants (low-κ) play an important role in newly-developed wave-transparent composites.

scholarly journals BN Nanoparticles/Si3N4Wave-Transparent Composites with High Strength and Low Dielectric Constant

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Dongliang Zhao ◽  
Yujun Zhang ◽  
Hongyu Gong ◽  
Baoxin Zhu ◽  
Xiaoyu Zhang
Keyword(s):  
Mechanical Properties ◽  
Dielectric Constant ◽  
Volume Content ◽  
Bending Strength ◽  
High Strength ◽  
Low Dielectric Constant ◽  
Low Dielectric ◽  
Transparent Composites ◽  
Gas Pressure Sintering ◽  
Dielectric And Mechanical Properties

Si3N4wave-transparent composites with different volume content of BN nanoparticles (BNnp/Si3N4) were prepared by gas pressure sintering at 1800°C in N2atmosphere. The effects of BN nanoparticles on the dielectric and mechanical properties of BNnp/Si3N4composites were investigated. The results showed that the addition of the BN nanoparticles improved the dielectric properties of BNnp/Si3N4composites effectively and decreased the mechanical properties. When the volume content of BN nanoparticles was 10%, the dielectric constant and dielectric loss tangent were 4.31 and 0.006, respectively, and the bending strength and fracture toughness still reached 198.9 MPa and 3.36 MPa·m1/2. The high mechanical properties of BNnp/Si3N4composites with 10% BN nanoparticles were attributed to homogeneously dispersed BN nanoparticles which were embedded in the pores formed by the rod-likeβ-Si3N4.

Facile method for fabricating low dielectric constant polyimide fibers with hyperbranched polysiloxane

2017 ◽  
Vol 5 (11) ◽  
pp. 2818-2825 ◽  
Author(s):  
Jie Dong ◽  
Cairan Yang ◽  
Yang Cheng ◽  
Tingting Wu ◽  
Xin Zhao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Dielectric Constant ◽  
High Performance ◽  
Low Dielectric Constant ◽  
Excellent Thermal Stability ◽  
Low Dielectric ◽  
Polyimide Fibers ◽  
Hyperbranched Polysiloxane ◽  
Radar Wave

High-performance fibers with a low dielectric constant and good mechanical properties as well as excellent thermal stability are in demand for the next generation of advanced radar-wave-transparent composites.

Unique surface modified aramid fibers with improved flame retardancy, tensile properties, surface activity and UV-resistance through in situ formation of hyperbranched polysiloxane–Ce0.8Ca0.2O1.8 hybrids

2015 ◽  
Vol 3 (23) ◽  
pp. 12515-12529 ◽  
Author(s):  
Xiaoling Zhu ◽  
Li Yuan ◽  
Guozheng Liang ◽  
Aijuan Gu
Keyword(s):  
Tensile Properties ◽  
Surface Activity ◽  
Flame Retardancy ◽  
Uv Resistance ◽  
Aramid Fibers ◽  
Hyperbranched Polysiloxane ◽  
In Situ Formation ◽  
Surface Modified ◽  
Unique Surface

Unique aramid fibers with hyperbranched polysiloxane–Ce0.8Ca0.2O1.8 hybridized coating were prepared, which have outstanding flame retardancy, tensile properties, surface activity and UV-resistance owing to the nature and synergistic effect of hybrids.

New Carbon-bridged Hybrid Polymers for Low-k Materials

2005 ◽  
Vol 863 ◽  
Author(s):  
Bum-Gyu Choi ◽  
Byung Ro Kim ◽  
Myung-Sun Moon ◽  
Jung-Won Kang ◽  
Min-Jin Ko
Keyword(s):  
Mechanical Properties ◽  
Hybrid Materials ◽  
Chemical Mechanical Planarization ◽  
Sol Gel ◽  
Dielectric Constants ◽  
Metal Line ◽  
Inorganic Hybrid ◽  
Low Dielectric ◽  
Continuous Stiffness Measurement ◽  
Low K

AbstractReducing interline capacitance and line resistance is required to minimize RC delays, reduce power consumption and crosstalk below 100nm node technology. For this purpose, various inorganic- and organic polymers have been tested to reduce dielectric constants in parallel with the use of copper as metal line. Lowering the dielectric constants, in particular, causes the detrimental effect on mechanical properties, and then leads to film damage and/or delamination during chemical-mechanical planarization CMP) or repeated thermal cure cycles. To overcome this issue, new carbon-bridged hybrid materials synthesized by organometallic silane precursors and sol-gel reaction are proposed.In this work, we have developed new organic-inorganic hybrid low-k dielectrics with linear or cyclic carbon bridged structures. The differently bridged carbon structures were formed by a controlled reaction. 1H NMR, 29Si NMR analysis and GC/MSD analysis were conducted for the structural characterization of new hybrid low-k dielectric. The mechanical and dielectric properties of these hybrid materials were characterized by using nanoindentation with continuous stiffness measurement and Al dot MIS techniques. The results indicated that these organic-inorganic hybrid materials were very promising polymers for low-k dielectrics that had low dielectric constants with high thermal and mechanical properties. It has been also demonstrated that electrical and mechanical properties of the hybrid films could be tailored by copolymerization with PMSSQ and through the introduction of porogen.

Mechanical properties of hybrid composites reinforced by carbon fiber and high-strength and high-modulus polyimide fiber

Polymer ◽  
2020 ◽  
Vol 204 ◽  
pp. 122830
Author(s):  
Bin He ◽  
Boyao Wang ◽  
Zhanwen Wang ◽  
Shengli Qi ◽  
Guofeng Tian ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Hybrid Composites ◽  
High Strength ◽  
High Modulus ◽  
Polyimide Fiber

Strength Test of Parallel Carbon Fiber Bundle for Prestressed Bridge

2011 ◽  
Vol 90-93 ◽  
pp. 994-998
Author(s):  
Shan Shan Xia ◽  
Wen Cheng Jin ◽  
Wen Huang ◽  
Hong Yin Yang
Keyword(s):  
Mechanical Properties ◽  
Fiber Bundle ◽  
High Strength ◽  
Fiber Composites ◽  
Strength Properties ◽  
Strength Test ◽  
Fiber Bundles ◽  
Curing Process ◽  
High Modulus ◽  
Resin Curing

Because of good mechanical properties of the fiber composites, the fiber bundles without the resin curing process and with the features of high modulus, high strength and good performance of creasing resistance etc, can be used in prestressed structures. According to the strength properties of the fiber, the tensile characteristic function of the fiber bundles is derived. The tensile test is designed and the parameters of the weibull distribution are estimated based on the result of the test. The ultimate strength of fiber is inversely proportional to the length of fiber. The calculating strength should be reduced in design, because the discreteness of the strength of the fiber bundle in test is much larger than the calculated values.

High-strength–high-modulus polyimide fibers II. Spinning and properties of fibers

1986 ◽  
Vol 32 (1) ◽  
pp. 3151-3176 ◽  
Author(s):  
Takaho Kaneda ◽  
Toshio Katsura ◽  
Kanji Nakagawa ◽  
Hiroshi Makino ◽  
Masao Horio
Keyword(s):  
High Strength ◽  
High Modulus ◽  
Polyimide Fibers
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