Synthesis and characterization of novel optically active poly(ester-imide)s with highTgand good thermal stability

2013 ◽  
Vol 24 (9) ◽  
pp. 807-813 ◽  
Author(s):  
Tao Han ◽  
Yi Zhang ◽  
Qiaoying Cao ◽  
Siwei Liu ◽  
Zhenguo Chi ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Optically Active ◽  
Synthesis And Characterization ◽  
Good Thermal Stability

Optically active poly(ester-imide): synthesis and characterization of new optically active poly(ester-imide) thermoplastic elastomers

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Abdol Reza Hajipour ◽  
Saeed Zahmatkesh ◽  
Arnold E. Ruoho
Keyword(s):  
Thermal Stability ◽  
Optical Activity ◽  
Acid Chloride ◽  
Thermoplastic Elastomers ◽  
Optically Active ◽  
Synthesis And Characterization ◽  
Propanoic Acid ◽  
Aprotic Solvents ◽  
Good Thermal Stability

AbstractThis Paper deals with the polycondensation between a chiral diacyl chloride (2-(N,N’-pyromelliticdiimido)-bis-propanoic acid chloride (4)) and polyethyleneglycol-diol (PEG-200) and/or three synthetic aromatic diols. The corresponding new PEIs and Co-PEIs which have been obtained in quantitative yields are soluble in polar aprotic solvents, have good thermal stability and optical activity.

Synthesis and Characterization of Low Content of Structural Defects of Aryl-Substituted Electroluminescent Poly(p-phenylenevinylene)s

2001 ◽  
Vol 665 ◽  
Author(s):  
Zhi-Kuan Chen ◽  
Nancy Hoi Sim Lee ◽  
Wei Huang
Keyword(s):  
Thermal Stability ◽  
Quantum Efficiency ◽  
Defect Structure ◽  
Main Chain ◽  
Structural Defects ◽  
Synthesis And Characterization ◽  
Good Thermal Stability ◽  
H Nmr ◽  
Polymer Main Chain

ABSTRACTWe report the synthesis and characterization of a novel series of aryl-substituted PPVs, which have shown excellent processability, good thermal stability, high photoluminescence quantum efficiency and low content of structural defects. The substituents of the polymers were designed with different degree of hindrance effect on the main chain. 1H NMR measurement indicates that the defect structure in the polymer main chain can be effectively depressed by introducing bulk and hindrance substituents.

Synthesis and Characterization of Polysulfonyldiphenylene Phenylphosphonate with High Melting Range

2011 ◽  
Vol 396-398 ◽  
pp. 2342-2345
Author(s):  
Zhong Wei Wang ◽  
Hao Dong Duan ◽  
Qing Yu
Keyword(s):  
Thermal Stability ◽  
Reaction Time ◽  
Thermogravimetric Analysis ◽  
Synthesis And Characterization ◽  
Target Product ◽  
High Melting ◽  
Melting Range ◽  
Reaction Conditions ◽  
Good Thermal Stability

Polysulfonyldiphenylene phenylphosphonate (PSPPP) with high melting range of 197 to 205 °C was synthesized via molten polycondensation method. The effect of material ratio, reaction temperature and reaction time of the method was studied, and the preferred reaction conditions were obtained. The target product was characterized by FTIR and thermogravimetric analysis (TGA) was carried out to confirm the thermal stability. The PSPPP synthesized in this paper showed fairly good thermal stability.

Luminescent europium(iii) complexes based on tridentate isoquinoline ligands with extremely high quantum yield

2021 ◽  
Vol 8 (1) ◽  
pp. 41-47
Author(s):  
Zelun Cai ◽  
Chen Wei ◽  
Boxun Sun ◽  
Huibo Wei ◽  
Zhiwei Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Quantum Yield ◽  
Synthesis And Characterization ◽  
Excitation Wavelength ◽  
High Quantum Yield ◽  
Good Thermal Stability ◽  
High Quantum ◽  
Luminescence Efficiency

Synthesis and characterization of two new lanthanide Eu(iii) complexes based on tridentate isoquinoline ligands with high luminescence efficiency, extended excitation wavelength and good thermal stability.

Synthesis and characterization of aromatic poly(ether ketone amide)s

1993 ◽  
Vol 5 (3) ◽  
pp. 187-196 ◽  
Author(s):  
Frank W Mercer
Keyword(s):  
Thermal Stability ◽  
Benzoyl Chloride ◽  
Aprotic Solvent ◽  
Dielectric Constants ◽  
Synthesis And Characterization ◽  
Good Thermal Stability ◽  
Ether Ketone ◽  
T Values ◽  
General Method

A general method for the preparation of amide-containing aromatic polyether ketones has been developed. Polymerization is based on a ketone-activated halo displacement in amide-containing bis(4-fluorobenzoyl) moieties by phenoxides. N,N-Bis[4-(4-fluorobenzoyl)-(4-phenoxyphenylJ]terephthalamide and 4-[(4-fiuorobenzoyl)-(4-phenoxyphenylcarbamoyl)]-N-[(4-fluorobenzoyl)-(4-phenoxyphenyl)]phthalimide were prepared by reaction of 4-fluoro-benzoyl chloride with N,N.bis(4-phenoxyphenyl)terephthalamide and 4-(4.phenoxy-phenylcarbamoyl)-N-(4-phenoxyphenyl)phthalimide, respectively, in dichloromethane in the presence of aluminum chloride. Reaction of N,N-bis[4-(4-fluorobenzoyl)-(4-phenoxyphenyl)]-terephthalamide and 4-[(4-fluorobenzoyl(4-phenoxyphenylcarbamoyl)]-N-[(4-fluorobenzoyl)-(4-phenoxyphenyl)]phthalimide with diphenols in an aprotic solvent in the presence of potassium carbonate gave a series of aromatic poly(ether ketone amide)s. Films of the aromatic poly(ether ketone amide)s displayed good thermal stability, flexibility, and T, values ranging from 134 to 186 CC. The dielectric constants of the films were characterized as a function of relative humidity (RH).

Synthesis and Characterization of Novel Arylidene and Cardo Ester Bismaleimides and Poly(aminoaspartimide)s Therefrom

2003 ◽  
Vol 15 (3) ◽  
pp. 301-318 ◽  
Author(s):  
Vasile Cozan ◽  
Mitica Sava ◽  
Luminita Marin ◽  
Maria Bruma
Keyword(s):  
Thermal Stability ◽  
Liquid Crystalline ◽  
Polarized Light ◽  
Analysis Data ◽  
Synthesis And Characterization ◽  
Elemental Analysis Data ◽  
Scanning Calorimetry ◽  
Good Thermal Stability ◽  
H Nmr

Six new bismaleimides (BMIs) having arylidene or cardo cycloaliphatic internal moieties were prepared by reacting 4-maleimidobenzoyl chloride with various arylidene or cardo bisphenols. The structures of BMIs were confirmed using elemental analysis data and spectroscopic (IR, 1H-NMR) characterizations. Two poly(aminoaspartimide)s (PAAs) were synthesized to exemplify one of the post-reaction abilities of the BMIs. Thermotropic liquid crystalline behavior was observed by differential scanning calorimetry and polarized light microscopy. The thermal stability of BMIs and PAAs was determined by thermogravimetric analysis and they showed good thermal stability except BMI 10, containing a cyclopentanone unit, which decomposed around 235°C. In this paper, we discuss the synthesis and characterization of these materials.

Synthesis and characterization of aromatic poly(ether ketone oxadiazole)s

1993 ◽  
Vol 5 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Frank W Mercer
Keyword(s):  
Thermal Stability ◽  
Relative Humidity ◽  
Aprotic Solvent ◽  
Dielectric Constants ◽  
Aluminium Chloride ◽  
Synthesis And Characterization ◽  
Good Thermal Stability ◽  
Ether Ketone ◽  
General Method

A general method for the preparation of oxadiazole containing aromatic poly(ether ketone)s has been developed. Polymerization is based on a ketone-activated halo displacement in oxadiazole containing bis(4-fluorobenzoyl) moieties by phenoxides. 2,5-bis[4-(4-fluorobenzoyl-(4-phenoxyphenyl)]-1,3,4-oxadiazole was prepared by reaction of 4-fluorobenzoyl chloride with 2,5-bis(4-phenoxyphenyl)-1,3,4-oxadiazole in dichloromethane in the presence of aluminium chloride. Reaction of 2,5-bis[4-(4-fiuorobenzoyl)-(4-phenoxyphenyl)]-1,3,4-oxadiazole with diphenols in an aprotic solvent in the presence of potassium carbonate gave a series of aromatic poly(ether ketone oxadiazole)s. Films of the aromatic poly(ether ketone oxadiazole)s displayed good thermal stability, flexibility, and Ts s ranging from 172 to 218 C. The dielectric constants of the films were characterized as a function of relative humidity (RH).

Synthesis and Characterization of Multi-Functional Substituted POSS

2012 ◽  
Vol 554-556 ◽  
pp. 227-230
Author(s):  
Li Ying Zhang ◽  
Xiao Jing Zhao ◽  
Ping Chen ◽  
Sheng Di Fan
Keyword(s):  
Thermal Stability ◽  
Nuclear Magnetic Resonance ◽  
Synthesis And Characterization ◽  
Wide Angle ◽  
X Ray Diffraction ◽  
X Ray ◽  
Good Thermal Stability ◽  
Elementary Analysis ◽  
Thermal Stability Of

Five different multifunctional nitro octaphenyl silsesquioxane (NPS) were Synthesised and reduction was carried out to obtain amino octaphenyl silsesquioxane(APS). These compounds were characterized with elementary analysis, fourier transform infrared(FTIR), nuclear magnetic resonance (NMR, 29Si), wide-angle X-ray diffraction(XRD) and thermogravimetry (TG). Experiental results showed that the longer the nitration time, the more nitro connected to the OPS, but not positively, nitro number remained unchanged after five hours. NPS has good thermal stability than corresponding APS under 450°C, and the thermal stability of APS are decrease with the increase of amino number.

Synthesis and characterization of acceptor–donor–acceptor-based low band gap small molecules containing benzoselenadiazole

2016 ◽  
Vol 94 (6) ◽  
pp. 553-558 ◽  
Author(s):  
Baji Shaik ◽  
Jin-Hee Han ◽  
Dong Jin Song ◽  
Hun-Min Kang ◽  
Sang-Gyeong Lee
Keyword(s):  
Thermal Stability ◽  
Small Molecules ◽  
Band Gap ◽  
Nitrile Group ◽  
Band Gaps ◽  
Synthesis And Characterization ◽  
Low Band Gap ◽  
Good Thermal Stability ◽  
Donor Acceptor

Acceptor–donor–acceptor-type compounds 5′,5″-(benzo[c][1,2,5]selenadiazole-4,7-diyl)bis(3′-dodecyl-2,2′-bithiophene-5-carbonitrile) (9) and 4,4′-(5,5′-(benzo[c][1,2,5]selenadiazole-4,7-diyl)bis(3-dodecylthiophene-5,2-diyl))dibenzonitrile (10) were designed and synthesized. These compounds differ in terminal positions, compound 9 with a thiophene-containing nitrile group and compound 10 with a phenyl-containing nitrile group. Both compounds have shown good thermal stability and low band gap. The band gaps of compounds 9 and 10 were 1.74 and 1.83 eV, respectively. These results indicate that they are promising materials for use in optoelectronics.

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