scholarly journals Effect of nano-BaTiO3 on thermal, mechanical, and electrical properties of HDDA/TPA photopolymer prepared by a digital light processor RP machine

2017 ◽  
Vol 24 (6) ◽  
pp. 875-881
Author(s):  
Sigit Tri Wicaksono ◽  
Shih-Hsuan Chiu ◽  
Kun-Ting Chen ◽  
Sheng-Hong Pong
Keyword(s):  
Dielectric Constant ◽  
Semiconductor Device ◽  
Inverse Correlation ◽  
Filler Loading ◽  
Thermo Gravimetric ◽  
Degradation Temperature ◽  
Mechanical And Electrical Properties ◽  
Thermo Gravimetric Analyzer ◽  
Dielectric Constant Increase ◽  
Semiconductor Device Analyzer

AbstractThe acrylate-based photopolymer consists of tetra-functional polyester acrylate (TPA), and hexanediol diacrylate (HDDA) has been successfully composited with nano barium titanate (BaTiO3) and completely cured via a digital light processor RP machine. The degradation temperature, tensile strength, hardness, resistivity, and dielectric constant of samples were characterized by Thermo Gravimetric Analyzer Hi-Res TGA2950, Universal Tensile Machine JIA701, Hardness Shore D tester, Fluke 117 multimeter, and Agilent B1500A Semiconductor Device Analyzer, respectively. The morphology changes of the samples were also investigated using the JEOL JSM-6390LV scanning electron microscopy (SEM). The results show that the improvement of degradation temperature is not obvious. Furthermore, the modulus elasticity, hardness, and dielectric constant increase as the filler loading increases up to 2 phr, but the resistivity is vice versa. Interestingly, there is an inverse correlation between dielectric constant and resistivity of photopolymer/BaTiO3 nanocomposite.

Thermal Properties of Silicon-Containing Polyimide Filled with Carbon Black of Low Structure

2014 ◽  
Vol 968 ◽  
pp. 21-24 ◽  
Author(s):  
Sunan Tiptipakorn ◽  
Sarawut Rimdusit ◽  
Sarote Phromdee ◽  
Kasinee Hemvichian
Keyword(s):  
Glass Transition ◽  
Thermal Properties ◽  
Transition Temperature ◽  
Carbon Black ◽  
Thermo Gravimetric ◽  
Electrically Conductive ◽  
Degradation Temperature ◽  
Thermo Gravimetric Analyzer ◽  
High Structure ◽  
Dsc Thermograms

The nanocomposites between silicon-containing polyimide (SPI) and electrically conductive carbon black (CB) of low structure (Conductex K Ultra) were prepared. The contents of the conductive nanofillers were varied from 0 to 40 phr. The thermal properties of the nanocomposites were determined via Differential Scanning Calorimeter (DSC) and Thermo-gravimetric Analyzer (TGA). DSC thermograms revealed that the glass transition temperature (Tg) and degradation temperature (Td) of the nanocomposites increased with increasing the amount of fillers. The Tg and Td values of the composites filled with high structure were higher than those of the ones filled with low structure.

Adsorption Characteristics of Modified MiL-101(Cr) for Gas (Mainly CH4) Storage Applications

2015 ◽  
Author(s):  
How Wei Benjamin Teo ◽  
Anutosh Chakraborty ◽  
Kim Tiow Ooi
Keyword(s):  
Natural Gas ◽  
X Ray Diffraction ◽  
Uptake Capacity ◽  
N2 Adsorption ◽  
Thermo Gravimetric ◽  
X Ray ◽  
Thermo Gravimetric Analyzer ◽  
Metal Organic ◽  
Ch4 Uptake

As promising material for gas storage applications, MIL-101(Cr) can further be modified by doping with alkali metal (Li+, Na+, K+) ions. However, the doping concentration should be optimized below 10% to improve the methane adsorption. This article presents (i) the synthesis of MIL-101 (Cr) Metal Organic Frameworks, (ii) the characterization of the proposed doped adsorbent materials by X-ray Diffraction, Scanning Electron Microscopy, N2 Adsorption, Thermo-Gravimetric Analyzer, and (iii) the measurements of methane uptakes for the temperatures ranging from 125 K to 303 K and pressures up to 10 bar. It is found that the Na+ doped MIL-101(Cr) exhibits CH4 uptake capacity of (i) 295 cm3/cm3 at 10 bar and 160 K and (ii) 95 cm3/cm3 at 10 bar at 298 K. This information is important to design adsorbed natural gas (ANG) storage tank under ANG-LNG (liquefied natural gas) coupling conditions.

Immobilization of K7PW11O39 on ZrO2 Nanofiber: Ultra-deep Desulfurization Based in Extraction Catalytic Oxidation Desulfurization System

2021 ◽  
Vol 72 (3) ◽  
pp. 89-101
Author(s):  
Guowei Zeng ◽  
Guihong Wu ◽  
Zhihui Wang ◽  
Xiaonan Li ◽  
Jie Yang ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Catalytic Mechanism ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Thermo Gravimetric ◽  
Transmission Electron ◽  
Deep Desulfurization ◽  
Thermo Gravimetric Analyzer ◽  
Ft Ir ◽  
Model Oil

In this work, K7PW11O39 (abbreviated as PW11) was immobilized on ZrO2 nanofibers and used as an efficient recyclable catalyst in extraction catalytic oxidation desulfurization system (ECODS).The 500 ppm DBT model oil(5mL) can desulphurize completely within 20 min with the catalytic conditions of 50��, 0.010 g 50 wt%- CTAB�C PW11�CZrO2 nanofibers and O/S molar ratio H2O2/DBT molar ratio�� was 2:1. The synthesized catalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and thermo gravimetric analyzer (TGA). The results indicated the PW11�CZrO2 nanofibers were synthesized successfully and the possible catalytic mechanism is also revealed.

Synthesis and Characterization of the Bismaleimides Containing Aliphatic-ether Chain for Microelectronics Application

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
J. L. Feng ◽  
C. Y. Yue ◽  
K. S. Chian
Keyword(s):  
Chain Length ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Thermo Gravimetric ◽  
Degradation Temperature ◽  
Dielectric Thermal Analysis ◽  
Aliphatic Ether ◽  
Synthetic Reaction

AbstractThis project aims to develop and characterize a series of bismaleimide (BMI) polymers based on maleic anhydride and aliphatic-ether diamines. The effects of varying the chain length of aliphatic-ether diamines on the resultant bismaleimide systems were evaluated so that their suitability for microelectronics applications could be evaluated. The synthetic reaction and properties of the bismaleimide materials were investigated using Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), Thermo- Gravimetric Analysis (TGA), Dielectric Thermal Analysis (DEA) and rheometry. Results showed that thermal, dielectric and rheological properties were all affected by the main chain length of BMI. The magnitude of the dielectric constant at 100 kHz increases with the increasing chain length. The curing peak temperature, curing heat and degradation temperature of BMI, all decrease with the increasing chain length.

The Effect of Residence Time on Biomass Pyrolysis of Several in Different Temperature Nodes

2015 ◽  
Vol 733 ◽  
pp. 280-283 ◽  
Author(s):  
Jian Jun Cai ◽  
Qing Cheng Wang ◽  
Quan Wang
Keyword(s):  
Residence Time ◽  
Kinetic Equations ◽  
Interval Length ◽  
Order Kinetic ◽  
Biomass Pyrolysis ◽  
Thermo Gravimetric ◽  
Experimental Conditions ◽  
Thermo Gravimetric Analyzer ◽  
Experimental Subjects ◽  
Typical Temperature

The effect of residence time on biomass pyrolysis is discussed in the paper. Firstly, several typical temperature nodes (573, 873, 1073, and 1273K) are selected as the experimental subjects. Then, the residence time is changed in these temperature nodes. Finally, thermo gravimetric analyzer is used to study the pyrolysis and kinetics characteristics of biomass in different experimental conditions. The results show that extension of residence time is not conducive to biomass mass loss and heat release at 523, 873, 1073, and 1273K. In the several temperature condition that the faster heating rate and the shorter residence time, the more weightlessness is and the phenomenon is more obvious in low temperature. With the increase of the residence time, area and value of the second endothermic peak decreases and the value moves to high temperature zone. When the residence time is not the same value, the biomass pyrolysis can still be fitted for two first-order kinetic equations. At the same time, temperature interval length of fitting curve decreases and further leads to E and A increase.

The Pyrogenation-Characters of Different Layers of the Castor Stalk

2011 ◽  
Vol 183-185 ◽  
pp. 2105-2109
Author(s):  
Xiao Ping Li ◽  
Ding Guo Zhou ◽  
Si Qun Wang ◽  
Hai Yan Mao
Keyword(s):  
Chemical Composition ◽  
High Performance ◽  
High Performance Liquid Chromatograph ◽  
Thermo Gravimetric ◽  
Liquid Chromatograph ◽  
Second Stage ◽  
Thermo Gravimetric Analyzer ◽  
The Relationship

Castor is one kind of excellent woody materials and can be used to make wood based panel instead of the wood materials. To use the castor stalk better, it studies the chemical composition including cellulose, hemicellulose and lignin by high performance liquid chromatograph (HPLC) and the standard of PRC respectively, the pyrogenation-characters by thermo gravimetric analyzer (TGA) and the relationship between chemical composition and the pyrogenation-characters by SAS. The results showed that the chemical composition and pyrogenation-characters are different in different layers of the castor stalk, besides the castor stalk is mainly pyrolysis in second stage (between 170-330°C).

Time-Dependent Dielectric-Constant Increase

2003 ◽  
Vol 150 (12) ◽  
pp. F203 ◽  
Author(s):  
Daisuke Ryuzaki ◽  
Takeshi Ishida ◽  
Takeshi Furusawa
Keyword(s):  
Dielectric Constant ◽  
Time Dependent ◽  
Constant Increase ◽  
Dielectric Constant Increase
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