Synthesis and Characterization of a New Thermosetting Boric Acid Ester

2011 ◽  
Vol 239-242 ◽  
pp. 1907-1910
Author(s):  
Jian Zhang ◽  
Jia Liu
Keyword(s):  
Weight Loss ◽  
Thermal Properties ◽  
Thermogravimetric Analysis ◽  
Boric Acid ◽  
Acid Ester ◽  
Hydrolytic Stability ◽  
Synthesis And Characterization ◽  
Boric Acid Ester ◽  
Ft Ir

A new thermosetting boric acid ester modifier containing unsaturated bonds (abbreviated TBCE) was prepared. Structure, hydrolytic stability, curing properties and and thermal properties of the boric acid ester were studied by FT-IR, DSC and TGA. The result indicated that the obtained boric acid ester was soluble in most common solvents and was easily processed. The thermogravimetric analysis of silicon-containing arylacetylene resin modified by TBSE (abbreviated MSAR) showed that char yield at 800°C was 87% under nitrogen and 49% under air, and Td5(temperature of 5% weight loss) were 570°C and 580°C respectively.

Synthesis and characterization of novel tetrakis (3-hydroxypropylmercapto)-substituted phthalocyanines

2013 ◽  
Vol 17 (06n07) ◽  
pp. 573-586 ◽  
Author(s):  
Çiğdem Yağcı ◽  
Ahmet Bilgin
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Properties ◽  
Synthesis And Characterization ◽  
The Novel ◽  
Scanning Calorimetry ◽  
Metal Free ◽  
Visible Spectra ◽  
Ft Ir ◽  
Aromatic Nitro

A phthalonitrile precursor 4-(3-hydroxypropylmercapto)phthalonitrile (3) was synthesized via a base-catalyzed nucleophilic aromatic nitro displacement of 4-nitrophthalonitrile with the 3-mercapto-1-propanol. A novel tetrasubstituted metal-free phthalocyanine (4) ( M = 2 H ) and its metal complexes (5–8) ( M = Zn , Ni , Cu and Co ) bearing 3-hydroxypropylmercapto moieties were prepared by the cyclotetramerization reaction of (3) with the appropriate materials. The visible spectra of the zinc(II) phthalocyanine (5) was recorded with different concentrations and different ions as Ag +, Hg 2+ and Pb 2+ in DMF and also with different solvents as dimethylformamide and pyridine. Fluorescence spectrum of the compound (5) was also studied. Temperature and frequency dependence of AC conductivity for (4–8) was investigated in air and under vacuum and were found to be ~10-8–10-5 S.m-1. Thermal properties of the phthalocyanines were examined by differential scanning calorimetry. All the novel compounds have been characterized by elemental analysis, UV-vis, FT-IR, NMR and MS spectral data and DSC techniques.

Synthesis and Characterization of Polyaniline Copolymer

2012 ◽  
Vol 217-219 ◽  
pp. 551-554
Author(s):  
Ting Xi Li ◽  
Yu Hua Zhao ◽  
Qian Li ◽  
Cheng Qian Yuan ◽  
Quan Liang Chen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Infrared Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
The Difference ◽  
Thermal Stability Of

Abstract. Polyaniline (PANI) and p-phenylenediamine (p-PDA)-aniline copolymer were prepared via a same microemulsion method. The structures of the PANI and p-PDA-aniline copolymer were characterized by infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis（TGA）. The results revealed the difference of synthesis and characterization between PANI and p-PDA-aniline copolymer. It was shown that structure of the copolymer is almost similar to that of PANI, but the p-PDA-aniline copolymer has a better crystallization than PANI, and the thermal stability of the copolymer is higher than that of pure PANI.

SYNTHESIS AND CHARACTERIZATION OF A RODLIKE LIQUID CRYSTALLINE POLYURETHANE OLIGOMER

2010 ◽  
Vol 03 (03) ◽  
pp. 169-172
Author(s):  
CHUN WEI ◽  
QIU-SHAN GAO ◽  
YONG-YANG GONG ◽  
XUE-MEI XIONG ◽  
XIN SHEN
Keyword(s):  
Weight Loss ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Decomposition Temperature ◽  
Synthesis And Characterization ◽  
Smectic A ◽  
Smectic A Phase ◽  
Ft Ir ◽  
Dimethylformamide Solution

A novel rodlike liquid crystalline polyurethane (LCPU) oligomer was synthesized by polyaddition of hexane-1,6-diylbis(4-hydroxybenzoate) with toluene 2,4-diissocyanate in N, N′-dimethylformamide solution. The properties of the LCPU oligomer were investigated by FT-IR, DSC, TGA, POM, WAXD and SEM. The LCPU oligomer was a yellow powder at room temperature, which maintained a stable rodlike microstructure below its melting point, and had high crystallinity. The LCPU oligomer exhibited thermotropic liquid crystalline properties between 166–183°C, and the smectic-A phase with focal conic fan textures at the liquid crystal state was observed by POM. The decomposition temperature of the LCPU oligomer at 5% weight loss was 282°C.

Synthesis and Characterization of Poly(butylenes succinate) with Control Different End-Group

2012 ◽  
Vol 430-432 ◽  
pp. 497-500 ◽  
Author(s):  
Chun Na Cui ◽  
Ji Tao Huang
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Thermal Properties ◽  
Acid Ester ◽  
Chemical Structure ◽  
Starting Material ◽  
Synthesis And Characterization ◽  
End Group

Poly (butylenes succinate) (PBS) was synthesized by using1, 4-butanediol and succinate as starting material, titanic acid ester and acetate as catalyst, and tried to improve PBS by changing end-group to carboxyl, hydroxyl and chlorine. The results of GPC showed, molecular weight of four kinds of polymer was all beyond seventy thousand; chemical structure of the polymer was measured by FTIR and nitrogen/sulfur/chlorine elementary analyzer; PBS controlled end-group had better thermal properties by DSC and TG; different end-group had influenced mechanical properties; and biodegradability experiment results showed biodegradable speed of PBS can be controlled by changing their end-group.

Synthesis and Characterization of Thermoplastic Poly (ether-imide) Elastormer Based on Di-(4-Aminopheny)Methane-Pyromellitimide Unit

2013 ◽  
Vol 423-426 ◽  
pp. 498-502
Author(s):  
Jiao Jiao Shang ◽  
Ming Lei ◽  
Shao Jian Lin ◽  
Jian Wu Lan ◽  
Xia Huang ◽  
...  
Keyword(s):  
Thermogravimetric Analysis ◽  
Ir Spectra ◽  
Chemical Resistance ◽  
Pyromellitic Dianhydride ◽  
Synthesis And Characterization ◽  
Scanning Calorimetry ◽  
Solubility Behavior ◽  
Ft Ir

Novel polymers with imide and ether were synthesized by pyromellitic dianhydride and Pyromellitic dianhydride (PMDA), 4,4'-metylenedianiline (MDA), amino-teminated polyoxypropylene (D2000). The structures and thermostability of polymer were characterized through FT-IR spectra, thermogravimetric analysis (TGA) and differental scanning calorimetry (DSC), solubility behavior was determined via seven solvents. The results indicate that these polymers have good chemical resistance and exhibit excellent thermostability owing to the introduction of imide units.

Synthesis and Characterization of Poly(N-Arylenebenzimidazole Ketone)

2012 ◽  
Vol 204-208 ◽  
pp. 4211-4214 ◽  
Author(s):  
Ye Wei Xu ◽  
Jie Tang ◽  
Guan Jun Chang ◽  
Fang Hua Zhu ◽  
Lin Zhang
Keyword(s):  
Weight Loss ◽  
Chemical Structure ◽  
Synthesis And Characterization ◽  
The Novel ◽  
Displacement Reaction ◽  
Good Solubility ◽  
Nucleophilic Displacement ◽  
Ft Ir ◽  
Good Agreement

Using 1,4-bis(2-benzimidazolyl) benzene (BBIB) and 4,4'-difluorobenzophenone as the monomers, poly(N-arylenebenzimidazole ketone) (PNABIK) has been prepared via the aromatic nucleophilic displacement reaction. The chemical structure of PNABIK was confirmed by FT-IR, elemental analysis and 1H NMR. The results show a good agreement with the proposed structures. The polymer was obtained in quantitative yields with Mn value 12500 and Mw value 28600, respectively. DSC and TGA measurements show that the glass transition temperature (Tg) is 202 °C and 5% weight loss temperature is 550°C in nitrogen and 571 °C in air, respectively. In addition, the novel polymer exhibit good solubility.

Synthesis and Characterization of Novel Sulfonated Poly( Arylene Ether Sulfone) Containing Fluorine Group

2011 ◽  
Vol 332-334 ◽  
pp. 581-584 ◽  
Author(s):  
He Fei Cai ◽  
Xiao Ping Duan ◽  
Juan Xie ◽  
Guang Li
Keyword(s):  
Weight Loss ◽  
Thermal Properties ◽  
Feed Ratio ◽  
Synthesis And Characterization ◽  
Aromatic Nucleophilic Substitution ◽  
Molecular Weights ◽  
Arylene Ether ◽  
New Type ◽  
Sulfonated Poly

A series of novel sulfonated poly(arylene ether sulfone) (SPAES) were prepared by aromatic nucleophilic substitution polycondensation of 4,4’-dichlorodiphenylsulfone (DCDPS), 3,3’-disulfonated-4,4’-dichlorodiphenylsulfone (SDCDPS) and new type fluorinated bisphenol monomer---4-fluorophenyl hydroquinone. Different degree of sulfonation (DS) of these SPAES could be controlled by varying the feed ratio of SDCDPS to DCDPS. High molecular weights of the products were confirmed by inherent viscosity, which could reach 2.43 dl/g. The structures of the obtained polymers were characterized by FTIR, NMR. DSC and TGA analyses explained the excellent thermal properties of the resulting SPAESs. The temperatures at 10% weight loss were higher than 513°C. Furthermore, all the polymers showed excellent solubility in common organic solvents, such as NMP, DMAC, and DMF. So the films of SPAESs could be casted from their solutions.

scholarly journals The Preparation, Thermal Properties, and Fire Property of a Phosphorus-Containing Flame-Retardant Styrene Copolymer

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 127 ◽  
Author(s):  
Yu Sun ◽  
Yazhen Wang ◽  
Li Liu ◽  
Tianyuan Xiao
Keyword(s):  
Thermal Properties ◽  
Thermogravimetric Analysis ◽  
Flame Retardant ◽  
Oxygen Index ◽  
Limiting Oxygen Index ◽  
Chemical Structures ◽  
1H Nuclear Magnetic Resonance ◽  
Phosphorus Containing ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

A 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) acrylate, (6-oxidodibenzo [c,e][1,2] oxaphosphinin-6-yl) methyl acrylate (DOPOAA), has been prepared. Copolymers of styrene (St) and DOPOAA were prepared by emulsion polymerization. The chemical structures of copolymers containing levels of DOPOAA were verified using Fourier transform infrared (FT-IR) spectroscopy and 1H nuclear magnetic resonance (1H-NMR) spectroscopy. The thermal properties and flame-retardant behaviors of DOPO-containing monomers and copolymers were observed using thermogravimetric analysis and micro calorimetry tests. From thermogravimetric analysis (TGA), it was found out that the T5% for decomposition of the copolymer was lower than that of polystyrene (PS), but the residue at 700 °C was higher than that of PS. The results from micro calorimetry (MCC) tests indicated that the rate for the heat release of the copolymer combustion was lower than that for PS. The limiting oxygen index (LOI) for combustion of the copolymer rose with increasing levels of DOPOAA. These data indicate that copolymerization of the phosphorus-containing flame-retardant monomer, DOPOAA, into a PS segment can effectively improve the thermal stability and flame retardancy of the copolymer.

One Step Synthesis and Characterization of Zirconia-Graphene Composites

2012 ◽  
Vol 600 ◽  
pp. 174-177 ◽  
Author(s):  
Jian Fei Xia ◽  
Zong Hua Wang ◽  
Yan Zhi Xia ◽  
Fei Fei Zhang ◽  
Fu Qiang Zhu ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Graphene Composite ◽  
Transmission Electron ◽  
One Step ◽  
Ft Ir ◽  
Xrd Techniques

Zirconia-graphene composite (ZrO2-G) has been successfully synthesized via decomposition of ZrOCl2•6H2O in a water-isopropanol system with dispersed graphene oxide (GO) utilizing Na2S as a precursor could enable the occurrence of the deposition of Zr4+ and the deoxygenation of GO at the same time. Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) techniques were used to characterize the samples. It was found that graphene were fully coated with ZrO2, and the ZrO2 existing in tetragonal phase, which resulted in the formation of two-dimensional composite.

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