Efficient Neutron Production from a Novel Configuration of Deuterium Gas-Puff Z-Pinch

A novel configuration of a deuterium z pinch has been used to generate fusion neutrons. Injecting an outer hollow cylindrical plasma shell around an inner deuterium gas puff, neutron yields from DD reactions reached Y-n = (2.9 +/- 0.3) x 10(12) at 700 ns implosion time and 2.7 MA current. Such a neutron yield means a tenfold increase in comparison with previous deuterium gas puff experiments at the same current generator. The increase of beam-target yields was obtained by a larger amount of current assembled on the z-pinch axis, and subsequently by higher induced voltage and higher energies of deuterons. A stack of CR-39 track detectors on the z-pinch axis showed hydrogen ions up to 38 MeV. Maximum neutron energies of 15 and 22 MeV were observed by radial and axial time-of-flight detectors, respectively. The number of DD neutrons per one joule of stored plasma energy approached 5 x 10(7). This implies that deuterium gas puff z pinches belong to the most efficient plasma-based sources of DD neutrons

Influence of technological factors on properties of chipboards based on a cardanol-containing polyurethane binder

To study the influence of technological factors upon physico-mechanical characteristics of chipboards containing a cardanol-containing polyurethane adhesive as a binder, a five-factor experiment was carried out twice in accordance with the Box-Wilson central composite design. The calculated optimal conditions for the chipboard pressing process have been proven by experimental data. © 2015, Pleiades Publishing, Ltd

Analysis of the influence of cardanol content on the properties of phenol-cardanol-formaldehyde novolac resins

The influence of cardanol content on the molecular-weight distribution and curing kinetics of phenol-cardanol-formaldehyde novolac oligomers is investigated. It is shown that, depending on the cardanol content, the resulting oligomers can be used as components in glues and sealants of different purposes. © 2014 Pleiades Publishing, Ltd

Synthesis of brominated cardanol derivatives and their effeciency as fire retardants for wood

The synthesis of a fire retardant based on bromo derivatives of cardanol was examined and the composition, structure, and fire-protective efficiency of this retardant were studied. © 2014, Pleiades Publishing, Ltd

Modeling of properties of the oriented strand board in STATGRAPHICS

This study is done to obtain experiment-statistical mathematical model of OSB properties depending from two factors: hot pressing stage overall time and hardener content in a binder based on phenol-cardanol-formaldehyde resin. A laboratory scale sample of phenol-cardanol-formaldehyde resin with substitution of 5 % by weight of phenol to cardanol with a molar ratio phenols (phenol + cardanol) to formaldehyde equal 1 to 2.33 (resin grade SFJ-OSB 5K) was prepared in R&D Center of PJSC “Uralchimplast”. As the hardener of the resin SFZH-OSB 5K, technical propylene carbonate was used. Average strands dimensions were: 40 - 80 mm length, 20 - 30 mm width and 0,5-0,8 mm thickness. Hot pressing of the wood chips briquette was performed in 11 minutes with heated press plates temperature of 180-190 ° by a three stage regime with maximum pressure of 2MPa. To study the influence of technological factors on the properties of OSB, a three-level full two-factor experiment on the Kono plan was performed, obtaining regression-based experimental statistical models of the properties of the object under study in the Statgraphics Centurion XV program. The received results of researches have shown the good opportunities of program Statgraphics Centurion XV for reception of regression mathematical models of properties of laboratory samples of plates OSB, describing laws of influence of technological factors on them. The resulting regression models, after checking their adequacy under industrial conditions, can be used to predict the properties of OSB and to control their quality. © 2018 CEUR-WS. All rights reserved

Polymer composites based on polyvinyl chloride and biomass of fallen leaves

The results of assessing the possibilities of using of biomass of fallen leaves as a filler of composite polymer materials with a polyvinyl chloride polymer matrix are presented. Samples of composites with biomass of fallen leaves we obtained by extrusion and hot pressing method. The dependences of their physical and mechanical properties on the content of the filler were determined. These de-pendencies are given in the form of polynomial of the second degree. In terms of most physical and mechanical properties (with the exception of impact strength) composites with biomass of fallen leaves are superior to samples of wood-polymer composites with wood flour with a similar degree of filling. Made of a comparison of the effectiveness of three different plasticizers: dimethyl phthalate, dibutyl phthalate and dioctyl therephthalate. The most promising is the use of dibutyl phthalate as a plasticizer. It has been shown that the biomass of fallen leaves is an effective replacement for wood flour in the production of wood-polymer composite materials with a s fr. © 2021 Izdatel'stvo Kalvis. All rights reserved.Представлены результаты оценки возможности использования биомассы опавших листьев в качестве наполнителя для полимерных композиционных материалов с поливинилхлоридной полимерной матрицей. Образцы композитов с биомассой опавших листьев были получены методом экструзии и горячего прессования. Определены зависимости их физико-механических свойств от содержания наполнителя. Данные зависимости приведены в виде полиномов второй степени. По большинству физико-механических свойств (за исключением ударной вязкости) композиты с биомассой опавших листьев превосходят образцы древесно-полимерных композитов с древесной мукой с аналогичной степенью наполнения. Проведено сравнение эффективности действия трех различных пластификаторов: диметилфталата, дибутилфталата и диоткилтерфталата. Наиболее целесообразным представляется использование в качестве пластификатора дибутилфталата. Показано, что биомасса опавших листьев является эффективной заменой древесной муки при производстве древесно-полимерных композиционных материалов с термопластичной полимерной матрицей