scholarly journals Studies on recording magnetic materials and magnetic composites. XXII. How the molecular weight of polymers having sulfonic acid groups influences their adsorption onto magnetic particles.

1989 ◽  
Vol 46 (6) ◽  
pp. 341-345
Author(s):  
Katsuhiko NAKAMAE ◽  
Shusaku NAKANO ◽  
Satoshi TANIGAWA
Keyword(s):  
Molecular Weight ◽  
Magnetic Materials ◽  
Sulfonic Acid ◽  
Magnetic Particles ◽  
Magnetic Composites ◽  
Sulfonic Acid Groups

New Sulfonated Polyethers and Polynaphthylimides based on TNT Derivatives

2009 ◽  
Vol 21 (5) ◽  
pp. 508-521 ◽  
Author(s):  
Alexander L. Rusanov ◽  
Ludmila G. Komarova ◽  
Elena G. Bulycheva ◽  
Margarita G. Bugaenko ◽  
Nataliya M. Belomoina
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Sulfonic Acid ◽  
Ether Group ◽  
Naphthalic Anhydride ◽  
Molecular Weights ◽  
Film Forming ◽  
Sulfonated Polymers ◽  
Bridging Groups ◽  
Sulfonic Acid Groups

New sulfonated and non-sulfonated monomers — dinitro and diamino compounds — were prepared on the basis of 1,3,5-trinitrobenzene (TNB) which is the demethylation product of 2,4,6-trinitrotoluene (TNT). The sulfonated dinitrocompounds interacted with different binuclear bis-phenols under the conditions of aromatic nucleophilic nitrodisplacement reactions. Polyethers of moderate molecular weights were prepared on the basis of dinitrocompound containing electron-withdrawing 3,5-dinitrodiphenyl sulfone-4′-sulfonic acid “bridging” groups. Copolymers and blends with other sulfonated polymers were prepared to improve the film-forming properties of the polyethers developed on the basis of 3,5-dinitrodiphenyl sulfone-4′-sulfonic acid. High molecular weight sulfonated polynaphthylimides were prepared by the interaction of sulfonated diamine containing electron-donating ether group — 3,5-diaminodiphenyl ether-4′-sulfonic acid — with bis(naphthalic anhydride)s. The sulfonated polyethers and polynaphthylimides thus obtained contain sulfonic acid groups in the side chains.

scholarly journals Methoxylation of α-pinene over poly(vinyl alcohol) containing sulfonic acid groups

2009 ◽  
Vol 147 (2-3) ◽  
pp. 302-306 ◽  
Author(s):  
D.S. Pito ◽  
I.M. Fonseca ◽  
A.M. Ramos ◽  
J. Vital ◽  
J.E. Castanheiro
Keyword(s):  
Vinyl Alcohol ◽  
Sulfonic Acid ◽  
Poly Vinyl Alcohol ◽  
Sulfonic Acid Groups

Superprotonic Conductivity of a UiO-66 Framework Functionalized with Sulfonic Acid Groups by Facile Postsynthetic Oxidation

2015 ◽  
Vol 127 (17) ◽  
pp. 5231-5235 ◽  
Author(s):  
Won Ju Phang ◽  
Hyuna Jo ◽  
Woo Ram Lee ◽  
Jeong Hwa Song ◽  
Kicheon Yoo ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Sulfonic Acid Groups

Do acid–base interactions really improve the ion conduction in a proton exchange membrane? – a study on the effect of basic groups

2019 ◽  
Vol 7 (34) ◽  
pp. 19820-19830 ◽  
Author(s):  
Yuqian Sui ◽  
Yexin Du ◽  
Huayuan Hu ◽  
Jieshu Qian ◽  
Xuan Zhang
Keyword(s):  
Physicochemical Properties ◽  
Sulfonic Acid ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Acid Base ◽  
Ion Conduction ◽  
Exchange Membrane ◽  
Sulfonic Acid Groups

Generating acid–base interactions between sulfonic acid groups in a proton exchange membrane (PEM) and the incorporation of basic groups are effective approaches to improving the physicochemical properties of a membrane.

Synthesis and characterisation of novel functional polyolefin containing sulfonic acid groups

2008 ◽  
Vol 44 (2) ◽  
pp. 475-482 ◽  
Author(s):  
Yi Zheng ◽  
Li Pan ◽  
Yan-Guo Li ◽  
Yue-Sheng Li
Keyword(s):  
Sulfonic Acid ◽  
Sulfonic Acid Groups

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.

Study on the Preparation of PAMAS/PEO Fibrous Membranes by Electrospinning

2016 ◽  
Vol 852 ◽  
pp. 1039-1045
Author(s):  
Hai Jun Zhou ◽  
Ting Ting Zhang ◽  
Yu Zhang ◽  
Jiao Xia Zhang ◽  
Wei Jie Guo
Keyword(s):  
Molecular Weight ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Sulfonic Acid ◽  
Oxidative Polymerization ◽  
Average Diameter ◽  
Vis Spectroscopy ◽  
Fibrous Morphology ◽  
Fibrous Membranes ◽  
Poly Aniline

Poly (aniline-co-2-methoxy aniline-5-sulfonic acid) (PAMAS) was synthesized by an oxidative polymerization in this paper. The resulted copolymer was characterized by Fourier transform infrared spectroscopy and UV-vis spectroscopy, respectively. The PAMAS fibrous membranes and PAMAS/PEO fibrous membranes were prepared via electrospinning. The influence of the molecular weight of PEO and the ratio of PAMAS/PEO in spinning solution on the fibrous morphology was studied. The results showed that PAMAS has fiber-forming ability separately. The addition of PEO was helpful to the the electrospinning of PAMAS. With the increasing of PEO’s molecular weight, the average diameter of the PAMAS/PEO fibers increased. With the increasing of PAMAS content, the fibrous average diameter has an increasing tendency.

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