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Polymers Alkylsulfones

Compared to starting polymers, alkylsulfonated FBI is more soluble in polar organic solvents (DMAA or DMSO). The solubiUty depends on the degree of alkylsulfonation. [Pg.109]

Polyaniline (PANI) can be formed by electrochemical oxidation of aniline in aqueous acid, or by polymerization of aniline using an aqueous solution of ammonium thiosulfate and hydrochloric acid. This polymer is finding increasing use as a "transparent electrode" in semiconducting devices. To improve processibiHty, a large number of substituted polyanilines have been prepared. The sulfonated form of PANI is water soluble, and can be prepared by treatment of PANI with fuming sulfuric acid (31). A variety of other soluble substituted AJ-alkylsulfonic acid self-doped derivatives have been synthesized that possess moderate conductivity and allow facile preparation of spincoated thin films (32). [Pg.242]

The flotation of sulfidic, oxidic, and salt-type ores and, in special cases, silicate ores can be improved by the use of ether carboxylates as collectors [221,222]. In particular, the flotation of fluorite, barite, and scheelite is mentioned. Special synergistic combinations of ether carboxylates with fatty acids [223] and with vinyl- or alkylsulfonic acid polymer [224] are described. [Pg.345]

The differences in the polymerization kinetics and colloidal behavior of polymerization systems based on monomers of different polarity may be illustrated (Bakaeva et al., 1966 Yeliseyeva and Bakaeva, 1968) by the polymerization of the model monomers, methyl acrylate and butyl methacrylate, at various concentrations of sodium alkylsulfonate (C,5H3 S03Na). The fact that the solubility of the monomers in water differs by two orders of magnitude (5.2 and 0,08/ , respectively) was used as a criterion of polarity. An additional advantage to comparing these two monomers is that their polymers have rather close glass transition temperatures which is important for coalescence of particles at later stages of polymerization. [Pg.261]

Both electrochemical and chemical oxidation have been used to produce 3-substituted alkylsulfonated pyrroles [106]. Electrochemical polymerisation was achieved using acetonitrile as solvent to form a solid deposit on the electrode. Alternatively, FeCl3 was used as oxidant. Conductivities in the range 0.001-0.500 S cm were obtained, with lower conductivity products obtained from chemical polymerisation. Others [107,108] have prepared homopolymers and copolymers of polypyrroles with alkyl sulfonate groups attached via the N-group. This N-group substitution decreases the polymers inherent conductivity. [Pg.382]

The introduction of sulfonic acid groups in the alkyl side chains affords water-soluble self-doped polypyrrole. Using the sodium salt of the 3-alkylsulfonic acid pyrrole, the monomer acts as electrolyte for the electrochemical synthesis as well. A second long alkyl chain on the opposite side of the pyrrole ring affords a highly ordered lamellar polymer also soluble in chloroform [96]. [Pg.550]

In contrast to PBI, the degradation of PBI-PS was observed in the temperature range 400-450 °C. The decomposition temperature of PBI-PS decreases as the degree of alkylsulfonation increases to 400 °C (Fig. 19) however, it is higher than the degradation temperature of perlluorinated polymer electrolytes (nearly 280 °C). [Pg.113]

Degradation of PBI-PS was studied by elemental analysis and FT-IR spectroscopy. It was foimd that the intensities of SO stretching vibrations decreased after heating the PBI-PS samples above 400 °C for 1 h. These results are similar to those reported by Giesehnan and Reynolds [166] who found that the degradation of PBI-PS occurs due to desulfonation. Hence, alkylsulfonated PBI is more thermally stable than sulfonated aromatic polymer electrolytes characterised by a degradation temperature between... [Pg.113]

C. The thermal stability of alkylsulfonated polymer electrolytes can be attributed to the strong chemical bond between the alkyl and the sulfonic acid groups. The introduction of alkylsulfonic acid groups into thermostable polymers involving alkane sultone is one of the most important approaches to the preparation of thermostable proton-conducting polymer electrolytes. [Pg.114]

Introduction of arylsulfonic and alkylsulfonic acid groups into aromatic polymer induces water absorption and makes them more hydroscopic. The water uptake of PBI-PS was determined by measuring the mass of the polymer before and after hydration. The dependence of the water uptake of PBI-PS on the relative humidity is presented in Fig. 20. [Pg.114]

The absorbed water molecules are more strongly bound to alkylsulfonated rather than perfluorinated polymers. One can assume that this is related to the difference in the absorbtion mechanisms and to the physical state of absorbed water in PBI-PS and perfluorinated polymer electrolytes. [Pg.117]

Uses Surfactant in cosmetics detergent base wetting agent for textile and leather auxs., detergents, cosmetics, disinfectants Trade Name Synonyms Mersolat H 95 [Bayer AG http //www.bayer-ag.de-, http //www.bayer.com-, Bayer/Industrial Chems./Textile http //www.bayerus.com] Sodium CIO-18 alkyl sulfonate CAS 68037-49-0 EINECS/ELINCS 268-213-3 Synonyms Alkylaryl sodium sulfonate n-Alkyl (CIO-18) sulfonic acids, sodium salts Cl 0-18-alkane sulfonate, sodium salt (C10-C18) alkylsulfonic acid, sodium salt Sulfonic acids. Cl0-18-alkane, sodium salts Empiricai Ci4H29NaO S Properties M.w. 300.44 Uses Antistat for thermoplastic film and molded goods, food-grade polymers Trade Name Synonyms Chemstat PS-101 [Chemax http //www.chemaxinc.com]... [Pg.3986]

Electrochemical homopolymerization of poly(aniline-N-alkylsulfonates) (alkyl = propyl, butyl and pentyl) in acetonitrile containing 0.1 M NaC104 and 5 % (v/v) 0.3 M HCIO4 was carried out by Rhee et al. [144]. The polymers were prepared on a platinum electrode by cyclic voltammetry (0.0 to 1.0 V vs Ag/AgCl) or potentiostatic techniques (1.0 V). These polymers were found to form liquid crystalline solutions in water. The conductivity of poly(aniline-N-propanesulfonic acid) and poly(aniline-N-butanesulfonic acid) was reportly 9 x 10 and 6 x 10 S/cm, respectively. Electrochemical polymerization of orthanilic acid, metanilic acid and sulfonic acid and their copolymerization with aniline in dimethyl sulfoxide containing tetrabutyl ammonium perchlorate were carried out by Sahin et al. [145]. These polymers and copolymers were found to be soluble in water, dimethyl sulfoxide and N-methylpyrrolidinone. The conductivity of orthanilic acid, metanilic acid and sulfonic acid was reportly 0.052,0.087 and 0.009 S/cm, respectively. The conductivity of copolymers for these three isomers of aminobenzene-sulfonic acid was reported as 0.094, 0.26 and 0.033 S/cm, respectively. Sahin et al. [146] have also prepared the copolymers of these three isomers with aniline in acetonitrile containing fluorosulfonic acid (FSO3H). The copolymers were found to be soluble in water, dimethyl sulfoxide and N-methylpyrrolidinone. [Pg.97]

Other 3-substituted thiophenes that have been polymerized include 3-methoxy [309-311], other 3-alkoxy [312], 3-phenyl [313,314], 3-(4-methoxyphenyl) [314], 3-(4-trifluoromethylphenyl) [314], 3-bromo [315], 3-alkylsulfonatethiophene [316-318], and others [319-323]. Poly-3-alkylsulfonate thiophenes are particularly interesting due to a striking property. Sodium poly-3-thiophene-j8-ethanesulfonate and sodium poly-3-thiophene-6-butanesulfonate and their conjugate acids are water soluble in both the doped and undoped states [317,318]. Ikenoue et al. [318] examined the conduction mechanism for this self-doped conducting polymer. [Pg.797]


See other pages where Polymers Alkylsulfones is mentioned: [Pg.47]    [Pg.44]    [Pg.107]    [Pg.51]    [Pg.354]    [Pg.282]    [Pg.355]    [Pg.82]    [Pg.255]    [Pg.184]    [Pg.47]    [Pg.304]    [Pg.241]    [Pg.549]    [Pg.83]    [Pg.83]    [Pg.109]    [Pg.109]    [Pg.111]    [Pg.114]    [Pg.236]    [Pg.384]    [Pg.45]    [Pg.81]    [Pg.266]    [Pg.268]    [Pg.269]    [Pg.225]    [Pg.774]    [Pg.3711]    [Pg.5382]    [Pg.7587]    [Pg.7983]    [Pg.683]   


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