Liquid-State Synthesis and Properties of Fluorescent Conducting Polymers: α, βi-SiW11AlIII/Polyaniline

2013 ◽  
Vol 561 ◽  
pp. 13-18
Author(s):  
Wan Li Yang ◽  
Qing Wen Wang ◽  
Rong Hua Ma
Keyword(s):  
Thermal Stability ◽  
Ir Spectroscopy ◽  
Fluorescence Spectroscopy ◽  
Hybrid Materials ◽  
Liquid State ◽  
Thermo Gravimetric Analysis ◽  
Synthesis Method ◽  
Average Diameter ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric

Four polyaniline hybrid materials were prepared by liquid-state synthesis method in the presence of dopant which synthesized by transition metal mono-substituted Keggin structure silicotungstate anions α, βi-[SiW11Al (H2O)O39]4-.The polyaniline hybrid materials were characterized by elemental analysis, IR spectroscopy, fluorescence spectroscopy, scanning electeon microscopy (SEM) and thermo gravimetric analysis, the properties of which such as thermal stability and conducting behavior were studied. It proved that the average diameter was 100nm, the conductivity was 9×10-2s·cm-1 and the flourescence property was better.

Liquid-State Synthesis and Properties of Fluorescent Conducting Polymers: α, βi-SiW11GaIII/Polyaniline

2011 ◽  
Vol 221 ◽  
pp. 326-332
Author(s):  
Wan Li Yang ◽  
Ren Jiang Lv ◽  
Rong Hua Ma
Keyword(s):  
Thermal Stability ◽  
Ir Spectroscopy ◽  
Fluorescence Spectroscopy ◽  
Hybrid Materials ◽  
Liquid State ◽  
Thermo Gravimetric Analysis ◽  
Synthesis Method ◽  
Average Diameter ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric

Four polyaniline hybrid materials were prepared by liquid-state synthesis method in the presence of dopant which synthesized by transition metal mono-substituted Keggin structure silicotungstate anions α, βi-[SiW11Ga(H2O)O39]4-. The polyaniline hybrid materials were characterized by elemental analysis, IR spectroscopy, fluorescence spectroscopy, scanning electeon microscopy (SEM) and thermo gravimetric analysis, the properties of which such as thermal stability and conducting behavior were studied. It proved that the average diameter was 100nm, the conductivity was 9×10-2s•cm-1 and the flourescence property was better.

Study on the thermal stability of Controlled Permeability Formwork

2011 ◽  
Vol 374-377 ◽  
pp. 1426-1429
Author(s):  
Xiao Meng Guo ◽  
Jian Qiang Li ◽  
Xian Sen Zeng ◽  
De Dao Hong
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Dynamic Mechanical Analysis ◽  
Thermo Gravimetric Analysis ◽  
Mechanical Analysis ◽  
Gravimetric Analysis ◽  
Construction Work ◽  
Thermo Gravimetric ◽  
Excellent Thermal Stability ◽  
Thermal Stability Of

In this study, the thermal properties of a kind of new geotextile materials, so called controlled permeable formwork (CPF), were studied. Thermo-gravimetric analysis showed that the weight of CPF didn’t change much between 0~350 °C. Dynamic mechanical analysis showed that the storage modulus of CPF reduced from 25 MPa to around 10 MPa when the temperature rose to above 100 °C. The strength of sample decreased slightly with the increase of the temperature. The breaking elongation changed slightly with a maximum at 80 °C. The CPF showed excellent thermal stability and was suitable for general use in construction work.

scholarly journals Physicomechanical and Operational Properties Polyurethane Thermal Panels

2020 ◽  
Vol 9 (4) ◽  
pp. 446-454
Keyword(s):  
Ir Spectroscopy ◽  
Uv Radiation ◽  
Thermo Gravimetric Analysis ◽  
Operation Time ◽  
Heat Stability ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
Operational Characteristics ◽  
Lower Temperature ◽  
Thermal Stability Of

Evaluation of consumer properties of polyurethane thermal panels is the goal of the work. Physico-mechanical and operational characteristics of thermal panels are determined to achieve the purpose of the work. Methods of IR spectroscopy and thermo gravimetric analysis were used to study the structure of the samples. Satisfactory consumer properties of the studied thermo panels are brought out: compliance of clinker with the DIN EN 121 standard; absence of visual defects and change of color of thermo panels after 50 cycles of freezing-thawing; absence of changing color of thermo panels after influence of UV of radiation with the wavelength of 240-320 nanometers within 607 hours 30 minutes; high values of coefficients of sound absorption in the frequency range from 600 to 1600 Hz; low heat conductivity of the FPU layer. The influence of UV-radiation on thermal stability of foamed polyurethane is valued. Thermal analysis methods and IR spectroscopy are used to assess the degree of UV - destruction of polyurethane foam. At destruction of foamed polyurethane there is a rupture of chemically weak communication and formation of alcohols, air, olefins. The results of IR-spectroscopy illustrate the beginning of the processes of destruction of samples of FPU under the influence of UV-radiation. Using the thermo gravimetric analysis the research of the FPU thermal properties under the influence of UV - radiations is conducted. It is established that compositions from FPU under the influence of UV- radiation have lower temperature of the beginning of decomposition, than initial material. The influence of UV-radiation on heat stability of the studied compositions is shown. The possible mechanism of destruction of FPU is confirmed in the research. The DSС method has estimated the resistance of FPU to the oxidizing influence characterizing the material operation time. The studied consumer properties of thermal panels show that they can be used in civil engineering as effective protection structures of buildings.

The Research for the Properties of the Outlast/Viscose Blended Yarns

2014 ◽  
Vol 633-634 ◽  
pp. 464-467
Author(s):  
Rui Peng Jin ◽  
Zi Min Jin ◽  
Xue Qin Wang ◽  
Yu Xiu Yan ◽  
Jian Wei Tao
Keyword(s):  
Thermal Stability ◽  
Differential Scanning Calorimetry ◽  
Elastic Property ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Thermo Gravimetric ◽  
Blended Yarn ◽  
Environment Temperature ◽  
Comfort Property

Outlast fiber is a kind of thermostat fiber that could absorb and release heat according to the changed environment temperature. It has been widely used in thermostat textiles. The outlast/viscose blended yarn we researched in this paper will be used in apparel fabric. As the demand in durability and comfort property of apparel fabric, we characterized the yarn by regain, tensile and damage properties, elastic property, differential scanning calorimetry (DSC) and thermo gravimetric analysis (TGA). The experiment results show that the outlast/viscose blended yarns have good hydroscopicity, elastic property, temperature adjusting performance and thermal stability.

Tribo-Thermal Based Evaluation of Non Asbestos Disc Brake Pad Formulation

2015 ◽  
Vol 766-767 ◽  
pp. 432-437
Author(s):  
V. Thiyagarajan ◽  
R. Vijay ◽  
K. Sivakumar ◽  
R.l. Harigovindhan
Keyword(s):  
Thermal Stability ◽  
Thermo Gravimetric Analysis ◽  
Disc Brake ◽  
Gravimetric Analysis ◽  
Brake Pad ◽  
Thermo Gravimetric ◽  
Metallic Material ◽  
Brake Pads ◽  
Structural Reinforcement ◽  
Alumina Fibre

Performance of Non Asbestos brake pad requires the optimization of numerous criteria. Alumina fibre is a metallic material which is light weight, excellent wear resistance, thermal stability and structural reinforcement properties. Hence the present work deals with the development of three friction composites in the form of standard disc brake pads using same ingredients in same proportion except alumina fiber containing 7%wt, 11%wt & 14% wt which is compensated by synthetic barites (filler) containing 16%wt, 12%wt & 9% wt and designated as NA01, NA02 and NA03 respectively. Various physical, thermal and mechanical characterizations are carried out as per IS2742 Part 3 standards in which the loss of ignition decreased while the specific gravity, compressive strength and hardness increased with the fiber increase. Then the tribological properties (Fade and Recovery) are tested using Chase Test following IS2742 Part 4 standards. The fade μ and recovery μ % were significantly influenced by the amount of fibre combinations. It was proved that, increase in amount of alumina fibre % had significant effect on fade μ %.Thermo Gravimetric Analysis (TGA) proves that higher fiber content has more thermal stability leading to good fade resistance. Over all NA03 formulation is proved as superlative performer.

Thermal Stability Enhancement Of Rubbery Ormosils

1994 ◽  
Vol 346 ◽  
Author(s):  
S. J. Kramer ◽  
J. D. Mackenzie
Keyword(s):  
Thermal Stability ◽  
Literature Review ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
Iron Compounds ◽  
Thermo Gravimetric ◽  
Relative Enhancement ◽  
Stability Enhancement ◽  
Thermal Stability Of

ABSTRACTThermal stability of a novel rubbery ORMOSIL of condensed tetraethoxysilane (TEOS) and polydimethylsiloxane (PDMS) was investigated along with methods by which to improve this stability. Based upon literature review of siloxane systems, modifications of the base ORMOSIL system was made which included substitution of polydimethyldiphenylsiloxane (PDMDPS) for PDMS, adding antioxidant, and adding iron compounds. Relative enhancement was investigated in terms of resilience measurements, and was also analyzed with thermo-gravimetric analysis (TGA) and differential thermal anaysis (DTA).

Coordination Compounds of Some 3d-Transition Metal Ions with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)- thiosemicarbazide

2008 ◽  
Vol 59 (7) ◽  
Author(s):  
Madalina Angelusiu ◽  
Maria Negoiu ◽  
Stefania-Felicia Barbuceanu ◽  
Tudor Rosu
Keyword(s):  
Coordination Compounds ◽  
Magnetic Moments ◽  
Thermo Gravimetric Analysis ◽  
Electronic Spectroscopy ◽  
Transition Metal Ions ◽  
Synthesis And Characterization ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
New Compounds

The paper presents the synthesis and characterization of Cu(II), Co(II), Ni(II), Cd(II), Zn(II) and Hg(II) complexes with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)-thiosemicarbazide. The new compounds were characterized by IR, EPR, electronic spectroscopy, magnetic moments, thermo-gravimetric analysis and elemental analysis.

scholarly journals Development of Nervilia fordii Extract-Loaded Electrospun PVA/PVP Nanocomposite for Antioxidant Packaging

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1728
Author(s):  
Peng Wen ◽  
Teng-Gen Hu ◽  
Yan Wen ◽  
Ke-Er Li ◽  
Wei-Peng Qiu ◽  
...  
Keyword(s):  
Food Packaging ◽  
Thermo Gravimetric Analysis ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Poly Vinyl Alcohol ◽  
Total Phenolic ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
Phenolic And Flavonoid ◽  
Thermal Stability Of

An ethyl acetate extract from of Nervilia fordii (NFE) with considerable suppression activity on lipid peroxidation (LPO) was first obtained with total phenolic and flavonoid contents and anti-LPO activity (IC50) of 86.67 ± 2.5 mg GAE/g sample, 334.56 ± 4.7 mg RE/g extract and 0.307 mg/mL, respectively. In order to improve its stability and expand its application in antioxidant packaging, the nano-encapsulation of NFE within poly(vinyl alcohol) (PVA) and polyvinyl(pyrrolidone) (PVP) bio-composite film was then successfully developed using electrospinning. SEM analysis revealed that the NFE-loaded fibers exhibited similar morphology to the neat PVA/PVP fibers with a bead-free and smooth morphology. The encapsulation efficiency of NFE was higher than 90% and the encapsulated NFE still retained its antioxidant capacity. Fourier transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD) analysis confirmed the successful encapsulation of NFE into fibers and their compatibility, and the thermal stability of which was also improved due to the intermolecular interaction demonstrated by thermo gravimetric analysis (TGA). The ability to preserve the fish oil’s oxidation and extend its shelf-life was also demonstrated, suggesting the obtained PVA/PVP/NFE fiber mat has the potential as a promising antioxidant food packaging material.

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