In situ synthesis of poly(ether ester) via direct polycondensation of terephthalic acid and 1,3-propanediol with sulfonic acids as catalysts

2019 ◽  
Vol 10 (26) ◽  
pp. 3629-3638 ◽  
Author(s):  
Ziyao Gan ◽  
Dexian Bing ◽  
Shuang Qu ◽  
Shengyi Li ◽  
Tianwei Tan ◽  
...  
Keyword(s):  
Terephthalic Acid ◽  
Sulfonic Acid ◽  
In Situ Synthesis ◽  
Direct Polycondensation ◽  
Sulfonic Acids ◽  
Ether Ester

Sulfonic acid-comprising catalysts were explored to in situ fabricate ether segments in the process of esterification of terephthalic acid and 1,3-propanediol, and developing a new pathway of poly(ether ester)s synthesis without the addition of oligoether as starting materials.

Synthesis of soluble sulfonated polybenzimidazoles derived from 2-sulfonate terephthalic acid

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Qunying Wu ◽  
Guyu Xiao ◽  
Deyue Yan
Keyword(s):  
Terephthalic Acid ◽  
Sulfonic Acid ◽  
Strong Acid ◽  
High Thermal Stability ◽  
Swelling Ratio ◽  
Solution Casting ◽  
Direct Polycondensation ◽  
Acid Base ◽  
Resistance To Oxidation ◽  
Sulfonic Acid Groups

Abstract2-Sulfonate p-terephthalic acid (sTA) was synthesized, and sulfonated polybenzimidazoles (sPBI) were prepared by direct polycondensation of 3,3’- diaminobenzidine (DAB) and sTA with 4,4’-oxybis(benzoic acid) (OBBA) or 2,2’- bis(4-carboxylphenyl)-hexafluoropropane (BCHFP). Thus the ether groups and hexafluoroisopropylidene units were incorporated into the backbone of the sPBI in order to improve the flexibility and solubility. The sPBI based on OBBA showed poor solubility, while the sPBI containing hexafluoroisopropylidene units were soluble in common solvents. sPBI-20 ~ sPBI-60 could form tough and transparent membranes by solution casting. sPBI indicated high thermal stability, the 5% weight loss temperature (T5%) which was higher than 520°C, decreased with the increase of degree of sulfonation. sPBI-20 ~ sPBI-60 showed no glass transition at temperatures lower than 380°C. In addition, sPBI showed low water uptake, low swelling ratio as well as excellent resistance to oxidation. But sPBI exhibited low proton conductivity because of the strong acid-base interactions between basic benzimidazole and sulfonic acid groups.

In situ synthesis, morphology and magnetic properties of poly(ether–ester) multiblock copolymer/carbon-covered nickel nanosystems

2010 ◽  
Vol 356 (37-40) ◽  
pp. 1893-1901 ◽  
Author(s):  
N. Guskos ◽  
J. Typek ◽  
B.V. Padlyak ◽  
Yu K. Gorelenko ◽  
I. Pelech ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
In Situ Synthesis ◽  
Multiblock Copolymer ◽  
Ether Ester

scholarly journals In situ synthesis and characterization of sulfonic acid functionalized hierarchical silica monoliths

2020 ◽  
Vol 96 (1) ◽  
pp. 67-82
Author(s):  
Richard Kohns ◽  
Ralf Meyer ◽  
Marianne Wenzel ◽  
Jörg Matysik ◽  
Dirk Enke ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
In Situ Synthesis ◽  
Synthesis And Characterization ◽  
Silica Monoliths

Electron Microscopy of Mycoplasma Pneumoniae

1971 ◽  
Vol 29 ◽  
pp. 258-259 ◽  
Author(s):  
E. S. Boatman ◽  
G. E. Kenny
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Growth Phase ◽  
Hela Cells ◽  
Sulfonic Acid ◽  
Gamma Globulin ◽  
Horse Serum ◽  
Morphological Aspects ◽  
The Family

Information concerning the morphology and replication of organism of the family Mycoplasmataceae remains, despite over 70 years of study, highly controversial. Due to their small size observations by light microscopy have not been rewarding. Furthermore, not only are these organisms extremely pleomorphic but their morphology also changes according to growth phase. This study deals with the morphological aspects of M. pneumoniae strain 3546 in relation to growth, interaction with HeLa cells and possible mechanisms of replication.The organisms were grown aerobically at 37°C in a soy peptone yeast dialysate medium supplemented with 12% gamma-globulin free horse serum. The medium was buffered at pH 7.3 with TES [N-tris (hyroxymethyl) methyl-2-aminoethane sulfonic acid] at 10mM concentration. The inoculum, an actively growing culture, was filtered through a 0.5 μm polycarbonate “nuclepore” filter to prevent transfer of all but the smallest aggregates. Growth was assessed at specific periods by colony counts and 800 ml samples of organisms were fixed in situ with 2.5% glutaraldehyde for 3 hrs. at 4°C. Washed cells for sectioning were post-fixed in 0.8% OSO4 in veronal-acetate buffer pH 6.1 for 1 hr. at 21°C. HeLa cells were infected with a filtered inoculum of M. pneumoniae and incubated for 9 days in Leighton tubes with coverslips. The cells were then removed and processed for electron microscopy.

Hydrothermal In Situ Synthesis ZnO Nanoarrays and Their Photocatalytic Applications

2013 ◽  
Vol 30 (6) ◽  
pp. 667
Author(s):  
Zhenzhen WANG ◽  
Fangfang LI ◽  
Han GUO ◽  
Jiuju FENG ◽  
Aijun WANG
Keyword(s):  
In Situ Synthesis ◽  
Photocatalytic Applications

In situ synthesis of SiC nanowire porous layer on carbon/carbon composites

2017 ◽  
Vol 101 (3) ◽  
pp. 1371-1380 ◽  
Author(s):  
Tao Li ◽  
Yulei Zhang ◽  
Jia Sun ◽  
Jincui Ren ◽  
Pengfei Zhang ◽  
...  
Keyword(s):  
Porous Layer ◽  
In Situ Synthesis ◽  
Carbon Composites

In situ synthesis of Mn3O4/graphene nanocomposite and its application as a lubrication additive at high temperatures

2021 ◽  
Vol 546 ◽  
pp. 149019
Author(s):  
Bao Jin ◽  
Jun Zhao ◽  
Guangyan Chen ◽  
Yongyong He ◽  
Yiyao Huang ◽  
...  
Keyword(s):  
High Temperatures ◽  
In Situ Synthesis ◽  
Graphene Nanocomposite ◽  
Lubrication Additive

scholarly journals Improved biorefinery pathways of marine diatoms using a water miscible ionic liquid and its colloidal solution: efficient lipid extraction and in situ synthesis of fluorescent carbon dots for bio-imaging applications

RSC Advances ◽  
2021 ◽  
Vol 11 (35) ◽  
pp. 21207-21215
Author(s):  
Paidi Murali Krishna ◽  
Veerababu Polisetti ◽  
Krishnaiah Damarla ◽  
Subir Kumar Mandal ◽  
Arvind Kumar
Keyword(s):  
Ionic Liquid ◽  
Colloidal Solution ◽  
Polar Solvent ◽  
Lipid Extraction ◽  
In Situ Synthesis ◽  
Marine Diatoms ◽  
Bio Imaging ◽  
Partition Method ◽  
Fluorescent Carbon Dots

In this study, a water-miscible ionic liquid (IL), 1-ethyl-3-methylimidazoliumacetate ([EMIM][Ac]), has been used for lipid extraction from marine diatoms Thalassiosira lundiana CSIR-CSMCRI 001 by following a non-polar solvent partition method.

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