Studies of the porous structure of the polymeric microspheres synthesized from di(p-acrylic phenyl)sulphone (DAS), (p-hydroxyphenyl-p-acrylic phenyl)sulphone (HAS) and divinylbenzene (DVB) are presented. The porous structure was characterized by the nitrogen adsorption method, inverse exclusion chromatography and atomic force microscopy. To describe the tendency of the microspheres to swell, the swelling propensities and the swellability coefficient were also determined.The results show that both polymers studied can be used as packing materials in chromatography. Their porous structures are relatively stable since they are characterized by a high degree of crosslinking. In addition, the polymer ASP-OH containing reactive hydroxyl functional groups provides a convenient starting material for chemical modifications.

The process of oxirane ring opening of thioether glycidyl resins under various temperatures has been described. Reaction rate constants (k) and the activaton parameters (Eα, ΔH*, ΔS*) for epoxy group loss of 1,2‐epoxy‐3‐(phenylthio)propane, 1,2‐epoxy‐3‐(p‐tolythio)propane, and 1,2‐epoxy‐3‐(p‐chloro‐phenylthio)propane using classical kinetic methods were determined. The reaction products were separated and analyzed by means of chromatography and the structure of the compounds was determined by means of the spectral analyses: IR, 1H‐NMR, and 13C‐NMR

ABSTRACT:The synthesis of new porous copolymers for chromatography purposes is presented. They are formed during the suspension and emulsion polymerization of methacrylate derivatives of bisphenol-S with divinylbenzene in the presence of the pore-forming diluent. One type of the obtained copolymers contains sulfonyl functional groups in its skeleton and the second sulfonyl and more polar hydroxyl groups. Chemical and porous structures of the obtained polymeric packings were studied.

SynopsisNew thioetherglycidyl resins produced by condensation of 1-mercaptomethylnaphthalene, 1,4-di(mercaptomethyl)naphthalene, 1,5-di(mercaptomethyl)naphthalene, and their mixture of 1,4-and 1,5-di(mercaptomethyI)naphthalene with epichlorohydrin were obtained. The condensation was carried out in two ways. In the first way, potassium salt of mercaptans and epichlorohydrin were used. In the second, epichlorohydrin was added to mercaptans and then the obtained chlorohydrin thioether was dehydrohalogenated by the alkaline hydroxide in water and n-butanol or isopropyl alcohol solution. The method of heterogeneous condensation of dithiol with epichlorohydrin in water and isopropyl alcohol solution proved to be the most effective. Yield, the epoxide content, and the total chlorine content for all resins were found. The structure of thioetherglycidyl resins with the highest epoxide content was determined by elementary analysis, and infrared (IR) and NMR spectra. Thermal stability of resins was studied during long controlled heating a t unchanged temperature and short heating carrying the thermal gravimetric analysis (TGA) mainly in air. As follows from the studies, thioetherglycidyl resins can be cured both chemically and thermally. INTRODUCTIONAmong epoxy resins, where an oxirane ring is part of the glycidyl group, the following types of epoxides can be distinguished in relation to the nature of the atom to which this group is attached: glycidyl ethers, glycidyl esters, glycidyl amine derivatives, and glycidyl thioethers. Their synthesis, properties, and applications were studied thoroughly. However, literature concerning thioetherglycidyl resins, i.e., the products of condensation of dithiol with epichlorohydrin, is poor.There are only few patents that can help to find methods of thioetheroglycidyl resin production. In one, the dithiol derivatives of diphenyloxide, diphenylsulfide, and diphenylmethane were used as the initial products which were then condensed with epichlorohydrin in an aqueous solution of sodium hydroxide.lV2 The obtained resins were sparingly soluble and possessed lower epoxide content in comparison with the theoretical calculations.Using another method, various sodium salts of the mercapto-or mercaptomethyl-of benzene, xylene, durene, methylbenzene, diphenyl, tetralin, and naphthalene derivatives obtained by the reaction of dithiol ether with sodium in the anhydrous ethanol? or sodium hydroxide in the toluene with simultaneous azeotropic distilling of water were condensed with epichlorohydrin. The second method though a little laborious, because of use of mercaptides, gives the resins 2394CHARMAS AND PODKOSCIELNY that are more readily soluble than those obtained by the first method, but their epoxy content is lower and does not exceed 80%. The patent literature gives only the methods for thioetherglycidyl resin production, the yield of reaction, and in some cases, the epoxy and chlorine content. It does not provide much information about their syntheses, structures, and physical and chemical prop...

SynopsisNew polythioesters of naphthalene derivatives by polycondensation of 1,4-di(mercaptomethyl)naphthalene, 1,5-di(mercaptomethyl)naphthalene, as well as their mixture with adipoyl and sebacoyl chlorides have been obtained. Low-temperature and high-temperature solution polycondensation as well as interfacial polycondensation have heen used. Interfacial polycondensation proved to be the most useful. To define the optimal conditions of interfacial polycondensation, the following factors influencing the process have been studied: ratio of aqueous to organic phase, concentration of hydrochloride acceptor, temperature of reaction and rate of addition of acid chloride, contribution of emulsifier and catalyst. Yield for all reaction products and reduced viscosity have been found. The structure of polythioesters of high-value viscosity and good yield was determined from elementary analysis, infrared spectra, x-ray, and thermogravimetric analysis. Some mechanical and electrical properties of the polythioesters obtained from the mixture of 1,4-and 1,5-di(mercap-tomethy1)naphthalene have been studied after pressing in increased temperature. The molecular weight was not determined because of very low solubility.