The polymer-dispersed liquid crystal (PDLC) films have been prepared by method of acrylic monomers photopolymerization with dissolved liquid crystal. PDLC systems based on ethylhexyl acrylate (EHA) methacrylic acid (MAA) and EHA - acrylic acid (AA) copolymers have been investigated. The optimal concentrations of acids in the polymer matrix in which there are minimum driving voltages have been identified. The optimum film thickness (35-40 microns) at which PDLC had the best electro-optical properties was determined on example of the EHA-MAA copolymer. Influence the polymer matrix modifiers such as dodecyl mercaptan (DDM) and ethylene glycol dimethacrylate (EGDM), both separately and together, on the morphology of the droplets and electro-optical system properties has been investigated. Micrographs of the modified films morphology were obtained. It was found that the maximum efficiency of the electro-optical properties is achieved when modifiers of the polymer matrix are used in conjunction in the ratio [DDM]/[EGDM] = 1. It is shown that in the modified structures a reduction of the threshold fields from 5,2 to 2,6 V/mu m is achieved.

Методом теплопроводящей калориметрии измерены при 298.15 K интегральные энтальпии растворения образцов полиметилметакрилата, полученных радикальной полимеризацией метилметакрилата в массе без участия и с участием передатчиков цепи – дисиланов различного строения. Показано, что различные значения энтальпии растворения полимера обусловлены изменением пространственной упаковки макромолекул полиметилметакрилата в процессе его получения, вызванным разным строением дисиланов.

Poly(t-butylmethacrylate) with the optimal molecular-weight characteristics (M (n) = 12,400; MW/M (n) = 1.35) for biocompatible polymers was synthesized by radical polymerization in the presence of thioglycolic acid as a chain transfer agent. The obtained polymer was converted by acid hydrolysis into a water-soluble copolymer of t-butylmethacrylate and methacrylic acid of 20:80 mass%, respectively. The copolymer of t-butylmethacrylate and methacrylic acid was modified with folic acid, which has affinity for tumor cells. A conjugate of the copolymer with doxorubicin and also a conjugate containing folate vector were synthesized. Their formation was proved using IR and UV spectroscopy.

The basic sizes characterizing the morphology of a few practically important synthetic organic polymers in the glassy and viscoelastic states are confronted with the maxima of the absorption spectra in the terahertz frequency range. These sizes are determined using the X-ray diffraction technique. The absorption spectra of these polymers have been measured by the method of terahertz time-domain spectroscopy in the temperature range from helium to room temperatures.

The kinetics of the polymerization of tert-butyl methacrylate was studied in the presence of thioglycolic acid as a chain transfer agent. The conditions for obtaining the polymer carrier with the most optimum characteristics for the biocompatible polymer were determined: M-n = 12400 and M-w/M-n = 1.35. The kinetics of the reaction of acid hydrolysis of poly (tert-butylmethacrylate) was studied. The activation energy of the reaction was 9.34 kJ / mol. Modification of poly (tert-butyl) with folic acid was carried out and its conjugate with doxorubicin was obtained.

Resistive compositions based on ter-copolymers of isobornylacrylate with methylmethacrylate and (meth)acrylic acid, which are synthesized using the controlled radical polymerization with reversible chain transfer, as well as triphenylsulphoniumtriflate as a photo-sensitive catalyst are studied. The effect of the chain-transfer agent, as well as the composition and molecular weight of the copolymer on the sensitivity of the resists to UV radiation (222 nm), is determined. Using the ter-copolymer of tert-butoxycarbonyloxystyrene with methylmethacrylate and methacrylic acid, the dependence of the lithographic properties of the photoresist on the chemical composition of the photoacid generator is analyzed. The plasma-chemical stability of (co)polymer resists of methacrylic series in the plasma of Ar + SF6 is studied.

The integral enthalpies of dissolution for polymethylmethacrylate samples obtained via the radical bulk polymerization of methylmethacrylate with and without the participation of chain-transfer agents (disilanes of different structure) are measured by heat-conduction calorimetry at 298.15 K. Different values of polymer enthalpies of dissolution are shown to be due to changes in the spatial packing of polymethylmethacrylate macromolecules during synthesis due to the different structures of disilanes.

Изучены резистивные композиции на основе тер-сополимеров изоборнилакрилата с метилметакрилатом и (мет)акриловой кислотой, синтезированных методом контролируемой радикальной полимеризации по механизму обратимой передачи цепи, и трифенилсульфонийтрифлата в качестве фоточувствительного катализатора. Оценено влияние агента передачи цепи, состава и молекулярной массы сополимера на чувствительность резистов к УФ-излучению (222 нм). На примере тер-сополимера трет-бутоксикарбонилоксистирола с метилметакрилатом и метакриловой кислотой изучена зависимость литографических свойств фоторезиста от химического строения фотогенератора кислоты. Исследована плазмохимическая стойкость (со)полимеров-резистов метакрилового ряда в плазме потоков Ar + SF6.

Thermal decomposition of poly-ethoxyethyl methacrylate and poly-methyl methacrylate studied by the method of thermogravimetry. Both samples were obtained free radical polymerization to high conversion in the presence of azo dinitrile isobutyric acid. Thermal activation energy calculated by Friedman and OFW methods depends on the degree of decomposition of poly-methyl methacrylate and poly-ethoxyethyl methacrylate.. The activation energy of the thermal decomposition of poly-methyl methacrylate changes on the degree of decomposition. For poly-ethoxyethyl methacrylate, depolymerized as poly-methyl methacrylate, within the measurement error to separate the individual stage thermal failed, the activation energy of its thermal decomposition in 1.5-2,5 times lower activation energy of the thermal decomposition of poly-methyl methacrylate at the same rate of decay.

A polyurethane composition modified by carbon nanotubes has been developed. The composition is to be used in horizontal road marking and has high-performance characteristics.

Chemically amplified resists based on methyl methacrylate ter-copolymers with methacrylic acid and isobornyl (met)acrylates, experiencing hydrolysis in the presence of photogenerated acid, responsible for pattern generation in resists, when they are exposed to the deep ultraviolet (254 nm), extreme ultraviolet (13.5 nm), and electron beam, are studied. The influence of the polymeric matrix, photoacid generator, and exposure conditions on quality of the chemically amplified image is evaluated.

Resists operating via two mechanisms, i.e., disruption of the main chain and hydrolysis of side functional groups occurring upon EUV and electron beam irradiation, are studied as a function of the chemical composition of a polymer substrate. We show that the latter, belonging to the group of chemically amplified resists, are an order of magnitude more sensitive to radiation and possess outstanding contrast, as compared with disruptive type resists.

Исследованы резисты, функционирующие по двум механизмам – разрыв основной цепи и гидролиз боковых функциональных групп – при ЭУФ- и электронно-лучевом экспонировании в зависимости от химического строения полимерной основы. Показано, что последние, относящиеся к химически усиленным резистам, обладают на порядок более высокой чувствительностью к излучению в сочетании с рекордным контрастом по сравнению с резистами деструктивного типа.

Polymer-dispersed liquid crystal (PDLC) systems on the basis of nematic liquid crystal E7 and amphiphilic binary copolymers of acrylic acid (AA) with such acrylates as 2-ethylhexyl acrylate (EHA), n-butyl acrylate (BA), and methyl acrylate (MA) are investigated. It is shown that the liquid crystal (LC) drops in the copolymer EHA-AA have submicrometre sizes, and their dependence on the composition of the photo-curable monomer mixture is described by a parabolic curve. The highly oriented domain structure in the same system is first revealed when electric field is applied. The threshold voltage for all systems begins to increase with some critical composition of a monomer mixture in which the longer the hydrocarbonic radical in an acrylate molecule, the higher the content of AA. The PDLC system based on the BA-AA copolymer with 30 wt% LC exhibits the least value of the driving voltage, 1 V mu m(-1), and the lowest memory effect.

Fiber-optic interferometers are one of the most sensitive components of optical meters of physical fields, mechanical strains and movements. The greatest efficiency is shown when such devices are used together with semiconductor sources - lasers, LED and SRD. Until very recently nonlinear effects in optical instruments and devices were thought to play an obvious role only with emissions having comparatively great power (from some units up to some tens mW ) in quartz fibers. The results of the most recent researches show that non-linear effects in fiber-interferometers with the length of baselines up to some kilometers with small emission power in the fiber (deciles mW ) play an important role.

The controlled radical polymerization of methyl methacrylate, 2-ethoxyethyl methacrylate, and tert-butyl methacrylate conducted via atom-transfer radical polymerization in the presence of the AIBN-FeCl3· 6H2O-N,N-dimethylformamide catalytic system is studied. For all the systems under study, the rate of reaction is first order with respect to the monomer concentration. The number-average molecular mass of the polymers linearly increases with conversion, and their polydispersity indexes are below 1.6. The rate of polymerization decreases in the following sequence: 2-ethoxyethyl methacrylate > methyl methacrylate > tert-butyl methacrylate. The presence of ω-terminal chlorine atoms in polymer macromolecules is confirmed by 1H NMR spectroscopy and through the block copolymerization of methyl methacrylate with a poly(ethoxyethyl methacrylate)-based macroinitiator.

The controlled radical polymerization of methyl methacrylate conducted via the atom-transfer mechanism in the presence of the AIBN-iron(III) chloride-DMF initiation system and 1-acetyl-2-phenylhydrazine as a reducing agent is investigated. The above system makes it possible to implement the pseudoliving mechanism of MMA polymerization, with the reaction-rate order with respect to the monomer concentration being equal to unity. The effective activation energy of MMA polymerization in the presence of the catalytic system under investigation is 41.8 kJ/mol. This value is more than 2.5 times lower than the activation energy of this process in the absence of 1-acetyl-2-phenylhydrazine, all other conditions being the same.