Hybrid materials of polyaniline and acidic hexaniobate nanoscrolls: high polaron formation and improved thermal properties

2014 ◽  
Vol 2 (22) ◽  
pp. 8205-8214 ◽  
Author(s):  
Claudio H. B. Silva ◽  
Ana M. Da Costa Ferreira ◽  
Vera R. L. Constantino ◽  
Marcia L. A. Temperini
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Hybrid Materials ◽  
High Thermal Stability ◽  
Polaron Formation

New hybrid materials of polyaniline and hexaniobate nanoscrolls were prepared by the mixture of the dispersions. These materials show high doping of polyaniline and high thermal stability.

scholarly journals Improved thermally stable oligoetherols from 6-aminouracil, ethylene carbonate and boric acid

2019 ◽  
Vol 17 (1) ◽  
pp. 1080-1086
Author(s):  
Elżbieta Chmiel-Szukiewicz
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Boric Acid ◽  
Ethylene Carbonate ◽  
Pyrimidine Ring ◽  
Polyurethane Foams ◽  
High Thermal Stability ◽  
H Nmr ◽  
Maldi Tof ◽  
Instrumental Methods

AbstractSyntheses of oligoetherols with a 1,3-pyrimidine ring and boron atoms using 6-aminouracil, ethylene carbonate and boric acid has been proposed. The structure of the obtained products were determined by instrumental methods (IR, 1H-NMR and MALDI-ToF spectra). The physicochemical and thermal properties of oligoetherols were examined. The products were characterized by high thermal stability. Based on the tests performed, it was found that oligoetherols obtained from 6-aminouracil, boric acid and ethylene carbonate are suitable for the manufacturing of polyurethane foams with improved thermal stability and reduced flammability.

Synthesis and Properties of Novel Hole-Transporting Materials Containing Triphenylamine and Bipyridine Units

2013 ◽  
Vol 690-693 ◽  
pp. 619-622
Author(s):  
Hai Jun Lv ◽  
Yi Feng Yu ◽  
Lei Liu ◽  
Ai Bing Chen ◽  
Zhi Chao Hu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Green Emission ◽  
High Thermal Stability ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Hole Transporting ◽  
Organic Light Emitting Devices ◽  
Hole Transporting Materials

Novel hole-transporting materials (M1, M2) containing triphenylamine and dipyridine units have been synthesized and characterized. Two compounds have excellent solubility in common solvents. The optical, electrochemical and thermal properties of the materials were studied in detail. The results show that two compounds have green emission in dichloromethane, high thermal stability and proper HOMO levels. The properties of compounds M1 and M2 indicate that two compounds are candidates for the application in Organic light-emitting devices as hole-transporting materials.

scholarly journals Study on Upconversion and Thermal Properties of Tm3+/Yb3+ Co-Doped La2O3-Nb2O5-Ta2O5 Glasses

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1352 ◽  
Author(s):  
Minghui Zhang ◽  
Haiqin Wen ◽  
Xiuhong Pan ◽  
Jianding Yu ◽  
Hui Shao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Upconversion Luminescence ◽  
Solid State Laser ◽  
Glass Forming Ability ◽  
High Thermal Stability ◽  
Temperature Sensing ◽  
Glass Forming ◽  
Dta Analysis ◽  
Co Doped

The effect of Yb3+ ions on upconversion luminescence and thermal properties of Tm3+/Yb3+ co-doped La2O3-Nb2O5-Ta2O5 glasses has been studied. Glass transition temperature is around 740 °C, indicating high thermal stability. The effect of Yb3+ ions on the thermal stability is not obvious. Both the glass forming ability and the upconversion luminescence first increase and then decrease with the increase of Yb3+ ions. The glasses perform low glass forming ability with ΔT around 55 °C. Blue and red emissions centered around 477, 651, and 706 nm are obtained at the excitation of 976 nm laser. The upconversion luminescence mechanism is energy transfer from Yb3+ to Tm3+ mixed with two- and three- photon processes. The thermal kinetic Differential Thermal Analysis (DTA)-analysis indicates that the average activation energy first increases and then decreases with the increase of Yb3+ ions. This result can be introduced in order to improve upconversion luminescence of glasses by crystallization in the future. Tm3+/Yb3+ co-doped La2O3-Nb2O5-Ta2O5 glasses with good upconversion and thermal properties show promising applications in solid-state laser, optical temperature sensing.

scholarly journals Modification of Poly(vinyl chloride) by N-Phenyl Itaconimides for the Improvement of Its Thermal Stability

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Asma M. Elsharif ◽  
Azza A. Al-Ghamdi ◽  
Abir S. Abdel-Naby
Keyword(s):  
Thermal Stability ◽  
Weight Loss ◽  
Thermal Properties ◽  
Vinyl Chloride ◽  
High Temperatures ◽  
Graft Copolymerization ◽  
Graft Copolymers ◽  
High Thermal Stability ◽  
Modified Polymers ◽  
Poly Vinyl Chloride

Poly(vinyl chloride) (PVC) is modified by N-phenyl itaconimide derivatives (N-(RPh)IM) as modifying agents or graft comonomers. The resulting modified polymers or graft copolymers were characterized using FTIR and UV/Vis spectrophotometry. The thermal properties of the modified polymers were investigated using thermogravimetry (TGA), which revealed that the synthesized polymers exhibited high thermal stability, as shown from the value of their initial decomposition temperatures and the percentage of weight loss at high temperatures. The polymer modified by 4-bromo itaconimide exhibited the most thermal stability. A mechanism for the modification reaction and the graft copolymerization of PVC was suggested.

An apigenin-based bio-benzoxazine with three polymerizable functionalities: sustainable synthesis, thermal latent polymerization, and excellent thermal properties of its thermosets

2020 ◽  
Vol 11 (36) ◽  
pp. 5800-5809
Author(s):  
Boran Hao ◽  
Lu Han ◽  
Yuqi Liu ◽  
Kan Zhang
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
High Thermal Stability ◽  
Sustainable Resources ◽  
Polymerization Behavior

An apigenin-based benzoxazine exhibiting a thermal latent polymerization behavior, high thermal stability and low flammability has been synthesized from sustainable resources.

New Mixed-Ligand Metal-Containing Monomer Based on Cobalt Acrylate and 4-Phenyl-2,2':6',2″-Terpyridine Ligand: Synthesis, Characteristics and Thermal Properties

2021 ◽  
Vol 899 ◽  
pp. 37-44
Author(s):  
Evgeny S. Sorin ◽  
Rose K. Baimuratova ◽  
Dmitry A. Chernyayev ◽  
Denis V. Korchagin ◽  
Igor E. Uflyand ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Polymer Matrix ◽  
Analytical Techniques ◽  
Thermal Polymerization ◽  
High Thermal Stability ◽  
Mixed Ligand ◽  
Dsc Analysis ◽  
X Ray ◽  
Vis Spectroscopy

New complex based on cobalt (II) acrylate and 4′-phenyl-2,2′:6′,2″-terpyridine (PhTpy) was synthesized and characterized using a number of analytical techniques including IR and UV- vis spectroscopy, elemental, X-Ray and TGA/DSC analysis. The complex has high thermal stability and crystallinity. It is found that decomposition of the complex is accompanied by thermal polymerization of acrylic fragments that is a potential way for the preparation nanoparticles of metals or their oxides stabilized by the polymer matrix.

Preparation of novel UV-cured methacrylate hybrid materials with high thermal stability via thiol–ene photopolymerization

2018 ◽  
Vol 54 (7) ◽  
pp. 5877-5897 ◽  
Author(s):  
Jiancheng Zhang ◽  
Liping Li ◽  
Ruilu Guo ◽  
Haorui Zhou ◽  
Zhiming Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Hybrid Materials ◽  
High Thermal Stability

Thermal and Oxidative Stability Thermosets Derived from Hybrids of Cyclosilazanes and Silicon-Containing Polyarylacetylene

2014 ◽  
Vol 1004-1005 ◽  
pp. 286-292
Author(s):  
Qian Hu ◽  
Hui Min Qi ◽  
Fan Wang ◽  
Ya Ping Zhu
Keyword(s):  
Thermal Stability ◽  
Hybrid Materials ◽  
Polymer Networks ◽  
High Thermal Stability ◽  
Thermooxidative Stability ◽  
H Nmr ◽  
Air Atmosphere ◽  
Thermal And Oxidative Stability ◽  
Ft Ir ◽  
Stable Hybrid

Oxidative stable hybrid thermosets derived from silicon-containing polyarylacetylene (PSA-V) and branched methylvinylcyclosilazane (b-MVSZ) have been prepared, and b-MVSZ was synthesized by coammonolysis reaction of methylvinyldichlorosilane and vinyltrichlorosilane, which was characterized by using GC-MS, FT-IR,1H NMR and GPC. The cure behaviors of PSA-V/b-MVSZ hybrids were investigated by DSC and the thermal and oxidative stabilities of the cured PSA-V/b-MVSZ hybrids were determined by TGA under nitrogen and air atmosphere. The results indicated that the PSA-V/b-MVSZ hybrids could be thermally cross-linked through the vinyl/ethynyl groups to form polymer networks. The cured PSA-V/b-MVSZ hybrids possessed high thermal stability, and with increasing the content of b-MVSZ, the thermooxidative stability of the hybrid materials was enhanced.

Synthesis and Characterization of SAR/SiO2 Hybrid Materials with High Thermal Stability

2011 ◽  
Vol 211-212 ◽  
pp. 571-575
Author(s):  
Jian Zhang ◽  
Jia Liu ◽  
Can Feng Wang ◽  
Fa Rong Huang ◽  
Lei Du
Keyword(s):  
Thermal Stability ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Terminal Group ◽  
High Thermal Stability ◽  
High Yield ◽  
Synthesis And Characterization ◽  
Curing Process ◽  
Ft Ir

A silicon-containing arylacetylene resin, poly[(dimethylsilyl)eneethynylene phenyleneethynylene] with methoxy silyl terminal group (abbreviated MSAR) was synthesized. The resin and tetraethoxysilane (abbreviated TEOS) were used to prepare silicon-containing arylacetylene resin (abbreviated SAR) /SiO2 hybrid materials by a sol-gel method. Both the curing process of the xerogel and thermal properties of the hybrid materials were studied by FT-IR, DSC and TGA. The thermogravimetric analysis of the hybrid materials showed that Td5 (temperature of 5% weight loss) was 696°C and char yield was 92.1% at 800°C in nitrogen. A Si-C-O ceramic residue was obtained in high yield(86.8%) by sintering up to 1450°C in nitrogen.

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