Wawrzyniec Podkościelny

Linear polythioesters. XXIV: Products of interfacial polycondensation of bis(4-mercaptomethylphenyl)sulphone with some aliphatic and phthaloyl dichlorides

Abstract New polythioesters were obtained by interfacial polycondensation of bis(4-mercaptomethylphenyl) sulphone with some aliphatic and phthaloyl dichlorides. To determine optimal conditions for polycondensation, the polythioester from bis(4-mercaptomethylphenyl)sulphone and sebacoyl chloride was chosen as a model system. The structures of polythioesters were determined by elemental analysis, infrared spectra (i.r.) and X-ray analysis. Thermal properties were examined by thermogravimetric analysis. Some physicochemical, mechanical and electrical properties have been studied.

Polymers containing sulfur in the side chain

We synthesized new thiodicarboxylic acids, p-tolylmethylthiomethylsuccinic acid and 1-naphthylmethylthiomethylsuccinic acid, and thiodiols, 2-(p-tolylmethylthiomethyl)-1,4-butanediol and 2-(1-naphthylmethylthiomethyl)-1,4-butanediol, by the addition of dimethyl itaconate with p-tolylmethanethiol or 1-naphthylmethanethiol, followed by hydrolysis or reduction, respectively, of the resultant dimethyl esters. These difunctional monomers were used for the synthesis of new linear polyesters and polyurethanes containing sulfur in the side chain. The polyesters were synthesized by melt polycondensation of the obtained acids with 2,2′-oxydiethanol. We found reduced viscosity, molecular weight (by GPC), and softening temperature for the reaction products. Low molecular weights, low softening temperature, and very good solubility in organic solvents are their characteristics. The polyurethanes were prepared by polyaddition diols with hexamethylene diisocyanate and tolylene diisocyanate in benzene. They were characterized by reduced viscosity and some tensile properties. The polyurethane derived from 2-(p-tolylmethylthiomethyl)-1,4-butanediol and hexamethylene diisocyanate (ηred. 1.17 dL/g) behaves like a high elasticity thermoplastic elastomer. Thermal stability of all polymers was determined by thermogravimetric analysis. The structure of the monomers and polymers were confirmed by elemental analysis and FTIR and 1H-NMR spectroscopy.

New Acrylic Esters, Derivatives of Some Diglycidyl Ethers as Main Components of Lacquer Compositions

Abstract UV-curable compositions consist of the new diacrylates and dimethacrylates of diglycidyl ethers of Bisphenols: P(1,1-bis-(4-hydroxyphenyl)-cyclopentane), C(1,1-bis-(4-hydroxyphenyl)-cyclohexane), H(1,1-bis-(4-hydroxyphenyl)-cycloheptane) reactive diluents and with photoinitiator Irgacure 651.

Urethane-Acrylates as Main Components of Lacquers for Protective Coating of Some Materials

Abstract The synthesis of urethane-acrylic UV-cured resins intended for application as protective coatings for optical fibers. The utility of these compositions for protective soft, hardness and intermediate coatings of optical fibers was checked and confirmed under manufacturing conditions.

Linear polythioesters—XXI. Products of interfacial polycondensation of bis(4-mercaptophenyl)sulphone with some aliphatic and isomeric phthaloyl dichlorides

Abstract New polythioesters were obtained by interfacial polycondensation of bis(4-mercaptophenyl)sulphone with some aliphatic and isomeric phthaloyl dichlorides. To determine optimal conditions of polycondensation, polythioesters from bis(4-mercaptophenyl)sulphone sebacoyl as well as isophthaloyl dichlorides were chosen as a model system. The structures of all polythioesters were determined by elemental analysis, i.r. and X-ray analysis. Initial decomposition temperature and maximum rate of decomposition temperature were defined from the curves of thermogravimetric analysis. Some physicochemical, mechanical and electrical properties have been determined.

Copolymerization of Bis(4-methacryloymethylphenyl) sulphone with styrene

Bis(4-methacrloylmethylphenyl) sulphone (BMMPhSu) was prepared by the reaction of bis(4-chloromethylphenyl)sulphone with potassium salt of methacrylic acid. The structure of this new compund was determined by element analysis, IR, 1 H-NMR and 13 C-NMR analyses. Besides, the fundamental physical properties of bis(4-methacryloylmethylphenyl)sulphone such as the melting point and solubility in common as well as vinyl solvents: styrene, methyl methacrylate, butyl acrylate, acrylonitrile, and divinylbenzene were determined. Using 8 different hardening systems (polymerization initiators) copolymerization of this compound with styrene was carried out. Combinations of the following compounds: benzoyl peroxide, methyl ethyl ketone hydroxyperoxide, N,N-dimethylaniline, cobalt naphthenate, and aromatic amine adduct were used for hardening (polymerization initiation). An infludence of BMMPhSu concentration on gelation times with the use of three hardening systems was studied. Finally two hardening systems were chosen and using them copolymerizations of 20 and 25% of BMMPhSu with styrene were carried out. The obtained copolymers were tested for mechanical properties: tensile strength, Youngs modulus, elongation at break hardness by Shores and Brinnells methods. Their thermal properties were also determined.