Use Of Vinyl Research Articles

Unlocking the Potential Use of Reactive POSS as a Coagent for EPDM/PP-Based TPV.

Thermoplastic vulcanizates (TPVs) are multifunctional materials consisting of two or more phases with solid elastomeric properties at room temperatures and fluid-like properties above their melting point. They are produced through a reactive blending process known as dynamic vulcanization. The most widely produced TPV type is ethylene propylene diene monomer/polypropylene (EPDM/PP), which is the focus of this study. The peroxides are mainly selected to be used in crosslinking of EPDM/PP-based TPV. However, they still have some disadvantages, such as the side reactions resulting in the beta chain scission of the PP phase and undesired disproportionation reactions. To eliminate these disadvantages, coagents are used. In this study, for the first time, the use of vinyl functionalized polyhedral oligomeric silsesquioxane (OV-POSS) nanoparticles was investigated as a potential coagent in EPDM/PP-based TPV production via peroxide-initiated dynamic vulcanization. The properties of the TPVs having POSS were compared with the conventional TPVs containing conventional coagents, such as triallyl cyanurate (TAC). POSS content and EPDM/PP ratio were investigated as the material parameters. Mechanical properties of EPDM/PP TPVs exhibited higher values in the presence of OV-POSS, which resulted from the active participation of OV-POSS into the three-dimensional network structure of EPDM/PP during dynamic vulcanization.

ANALISIS PERBEDAAN PENGARUH PENGGUNAAN VINYL DAN KARPET SEBAGAI PENUTUP LANTAI TERHADAP KENYAMANAN TERMAL PADA KAMAR HOTEL (Studi Kasus : Hotel Grasia Semarang)

<p>Replacing the floor covering from carpet with vinyl is an effort to increase the <br />comfort of room users and the effectiveness of carrying out maintenance. However, <br />the use of vinyl and carpet as floor coverings for hotel rooms has an influence on <br />thermal comfort. So it is necessary to analyze the effect of using vinyl and carpet as <br />floor coverings on thermal comfort in hotel rooms. The research method used is <br />descriptive quantitative. This research is in the form of measuring temperature, <br />humidity, and lighting in rooms 204, 206, 222, and 224 Hotel Grasia Semarang. <br />Rooms with vinyl floor coverings tend to be comfortable in the morning (-0,5 ≤ PMV <br />value ≤ +0,5), during the day the thermal comfort can worsen (if PMV value ≤ -0,5 <br />or PMV value ≥ +0,5), and in the afternoon tend to be comfortable. While rooms <br />with carpet floor coverings in the morning tend to be comfortable, during the day</p>

Potential factors affecting chronic chemical intolerance associated with constitutional predisposition or lifestyle and environment during childhood: From a six-year follow-up study

ObjectiveThe Japanese chemical intolerance (JCI) study was conducted in January 2012 with a cohort of 7245 adults from population-based sampling. This study aimed to investigate the childhood constitutional and environmental factors involved in the development of chronic CI from the prospective cohort study. MethodsIn the cohort, 4683 persons were identified after six years. Self-reported questionnaires were administered to the subjects to obtain information on CI status; medical history; constitution, lifestyle, and housing environment during childhood; and recent psychosomatic states. We assessed the differences between individuals with persisting CI status during the follow-up (defined as chronic CI) and controls not having CI status during the follow-up. ResultsA total of 2500 individuals responded. Multiple logistic regression analyses revealed significant associations between chronic CI and motion sickness to car or bus and allergic conjunctivitis during childhood. Significant associations between a possible increased risk of CI and the existence of high-voltage power lines close to housing, the use of vinyl covering in wall material, the use of strong perfume by a family member, and the experience of stinky odor of paint or wax at elementary school were observed. However, the use of carpet in floor material and plaster coating in wall material was associated with a possible decreased risk of CI. ConclusionsSome potential constitutional predisposition from childhood, including inherent susceptibility in the autonomic nervous system may be involved in the development of CI.

TECHNOLOGICAL PROCESSES OF SOUND MAKING IN AUDIOVISUAL WORK

The relevance of the article. The article explores technological processes of creating sound accompaniment in audiovisual works and points out main categories that expose a panoramic picture of these processes. The soundtrack in relation to a motion picture is a flexible, modern structure with a large number of components. There is a number of technical means for reproducing sound accompaniment in audiovisual work. More than a hundred years ago, when it was necessary to make works of fine art more affecting and impressive with the help of sound, they used to fall back on acoustic musical instruments, which were part of various types of orchestras. Noise sounds were also widely used. At the same time, the development of audio–visual interaction in motion picture took place. Eventually, this process began to include technologies based on the use of vinyl records, discs, films and tape recordings. Today, they are replaced by the latest, rapidly updated digital equipment that enhances and expands the possibilities of sound in audiovisual work The purpose of the article is to reveal and systematize the main components of the technological process of reproducing sound accompaniment in a motion picture, as well as, generalize results in graphical form, showing a panoramic view of this process. Research methods of studying technological processes of sound production in audiovisual work are: system-analytical (investigating sources that reveal these prosesses, their comparative analysis and systematization) and generalizing (investigating origins of the main categories and exposing a panoramic picture of these processes). Conclusions. The work summarizes information on the technology of sound field creation, main categories that make up this process (sound as a unit of musical information and a core of the background composition; engineering equipment and a group of specialists responsible for sound recording), principles of sound sources processing (methods of working with sounds and effects), structural categories (holistic background compositions) and methods of implementation, the effectiveness of technological processes in creating sound design. The article outlines the author’s concept of creating soundtrack in audiovisual work as a scientific and practical process and gives prospects for its development.

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VINYL AND LINOLEUM FLOORING: HEALTH ISSUES AS PERCEIVED BY LAY PEOPLE AND ARCHITECTS

Recently more information has emerged on possible adverse health effects associated with some building and furnishing materials, leading to or initiating legislative changes towards their reduction or elimination in many parts of the world. However, more general knowledge of the health risks associated with building and furnishing materials could make a significant contribution to improvements in indoor air quality. A study was set up to evaluate the level of knowledge in the relevant literature and the general population (from New Zealand, United Kingdom and the United States), and New Zealand architectural professionals. The results for vinyl and linoleum are presented, these being two flooring materials very similar in terms of appearance and application, but different in terms of chemical content and possible impact on health. The article indicates significant issues with the level of reported knowledge, with participants from the general population struggling to differentiate between vinyl and linoleum, and professionals reporting more prevalent use of vinyl, which they rate as less healthy.

Selective acylation of the phenolic hydroxyl of (hydroxyalkyl)phenols by using vinyl carboxylates as acyl donors in the presence of rubidium fluoride

Highly selective acylation of the phenolic hydroxy group can be achieved with (hydroxyalkyl)phenols carrying both alcoholic and phenolic hydroxyls by the use of vinyl carboxylates as acyl donors in the presence of rubidium fluoride.

Organocatalytic Vinyl and Friedel−Crafts Alkylations with Trifluoroborate Salts

Herein we report the first use of vinyl and heteroaryl trifluoroborate salts as viable substrates for amine-catalyzed conjugate additions. The application of LUMO-lowering iminium catalysis has enabled the highly regio- and enantioselective 1,4-addition of rationally designed trifluoroborate salt nucleophiles to α,β-unsaturated aldehydes. Imidazolidinone 2•HCl was found to catalyze the addition of various BF3K-derived heteroaryl and vinyl species to a range of enals with excellent levels of enantioselectivity. Importantly, the use of these salts can enable nontraditional regiocontrol as part of a Friedel−Crafts pathway. Boronic acids can also be employed as viable π-nucleophiles for these asymmetric conjugate additions provided that in situ activation to the corresponding boronate species is accomplished. While BF3K salts are routinely employed in transition metal catalysis, to our knowledge, this is the first use of this activation group for organic catalysis or Friedel−Crafts alkylations.

Vinyl meeting today's and tomorrow's indoor air quality requirements

AbstractThe growth of the “green” building market has raised new questions about the indoor air performance of building products. Indoor air pollution can consist of chemical, biological, and particulate irritants. Vinyl products have been shown to be well suited with respect to indoor air criteria as defined in current standards and “green” building guidelines. People spend more that 80% of their time indoors. Measurements have shown that levels of some indoor air contaminants can be many times higher than those outdoors. Known sources and factors for poor indoor air quality include tobacco smoke, radon, microbial contamination, dust, pet dander, fibers, and particulates. But they seem to be secondary to public concern for chemical emissions from products. Concerns of health effects from certain chemical air pollutants at even very low concentrations (parts per billion) in the workplace and the home have driven suppliers to test their products for emissions in order to assess the impact of those products on indoor air quality. Technology and methods to evaluate the indoor air performance of products have advanced over the past decade. State, federal, and green building rating guidelines with health‐based exposure limits have evolved both domestically and globally. At the same time, the use of vinyl as a replacement for traditional materials and products in the building and construction sector continues to grow. New uses such as vinyl decking and rail, vinyl moldings and trims, along with new flooring and wall covering designs, have increased the use of vinyl in both exteriors and interiors of buildings. Product manufacturers' attention to impacts of products on indoor air quality has resulted in the development of new innovative vinyl compounds and new installation methods. Taken together, these improvements allow vinyl products to meet and exceed even the evolving target for product performance from an indoor air quality perspective. Many of these products require less maintenance and cleaning, thus resulting in lowering of indoor pollutants. Although technical successes have evolved, commercial success will depend on a conscientious consumer. J. VINYL ADDIT. TECHNOL., 13:138–142, 2007. © 2007 Society of Plastics Engineers

Metathesis of heteroatom-substituted olefins and alkynes: Current scope and limitations

The use of vinyl- or alkynyl derivatives of the type C C–X or C C–X (where X is an heteroatom) as substrates for metathesis increases further this reaction’s versatility. Selected examples illustrating recent progress in this area of research are presented. Current scope and future potential developments are discussed.

Vinyl and Aryl Metals

AbstractFor Abstract see ChemInform Abstract in Full Text.

Easy Access to N,N‐Bis(but‐3‐enyl)‐, N‐Allyl‐N‐(but‐3‐enyl)‐, and N‐(But‐3‐ynyl)‐N‐(but‐3‐enyl)‐amines.

N,N-Bis(but-3-enyl)amines 5a-i were prepared in overall 74% yield from 1-(triphenylphosphoroylideneaminoalkyl)benzotriazole using an aza-Wittig reaction with aldehydes followed by a double Grignard reaction with allylmagnesium bromide. Use of vinyl or 1-propynylmagnesium bromide and allylmagnesium bromide in a sequential fashion also formed the expected doubly unsaturated amines 9a,b and 12, respectively.

Easy access to N,N-bis(but-3-enyl)-, N-allyl-N-(but-3-enyl)-, and N-(but-3-ynyl)-N-(but-3-enyl)-amines.

N,N-Bis(but-3-enyl)amines 5a-i were prepared in overall 74% yield from 1-(triphenylphosphoroylideneaminoalkyl)benzotriazole using an aza-Wittig reaction with aldehydes followed by a double Grignard reaction with allylmagnesium bromide. Use of vinyl or 1-propynylmagnesium bromide and allylmagnesium bromide in a sequential fashion also formed the expected doubly unsaturated amines 9a,b and 12, respectively.

Negative process could boost vinyl use in automotive panels

Negative process could boost vinyl use in automotive panels

Effect of Application of Benzyl Benzoate on House Dust Mite Allergen Levels

Several acaricides have become available for reducing house dust mite allergen levels. The purpose of this study was to assess whether the use of benzyl benzoate (Acarosan) provides additional benefit to the usual mite control measures including encasement of mattress and pillows with vinyl covers. A randomized controlled trial was carried out in 26 homes (14 control versus 12 treatment) of asthmatic patients in two cities (Vancouver and Winnipeg). The control group had the usual house dust mite control measures including the use of vinyl covers for mattresses and pillows while the treatment group had application of benzyl benzoate to mattresses and carpets in the bedroom and the most commonly used room, in addition to the above control measures. Mite allergen levels were measured 3 months and immediately before, 1 week, and 1 and 3 months after the application of house dust mite control measures. Patients kept diary cards on asthma symptoms and peak expiratory flow rates morning and evening one month before and three months after the onset of mite allergen control measures. A reduction of mite allergen level was found in mattress samples in both groups, statistically significant at all times in the treatment group and at one and three months in the control group. Mite allergen levels on floor carpets also showed progressive reduction in both groups, but were significantly different in the treatment group (compared with controls) at 1 week, and were lower compared with baseline in the treatment group up to 3 months. No significant changes in asthma symptoms, peak expiratory flow rates, spirometric measurements, or bronchial hyperresponsiveness were observed among treatment or control group subjects. The addition of benzyl benzoate to conventional house dust mite control measures resulted in a significant reduction in floor carpet dust mite levels that persisted for 3 months. The results of this study should be confirmed in a larger and longer study.

ChemInform Abstract: The Chemistry of Vicinal Tricarbonyls. Use of Vinyl and Acetylenic Derivatives in the Synthesis of Substituted Indoles.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

The chemistry of vicinal tricarbonyls. Use of vinyl and acetylenic derivatives in the synthesis of substituted indoles

Vinyl and acetylenic vicinal tricarbonyl derivatives take part as dienophiles in Diels-Alder reactions leading to substituted indoles as well as to their dihydro and tetrahydro derivatives.

Synthetic Transformations of Vinyl and Aryl Triflates

The increasing use of vinyl and aryl trifluoromethanesulfonates (triflates) is due to their facile preparation from carbonyl compounds and phenols. They undergo cross-coupling reactions with organo-metallics as the corresponding organic halides or addition reactions to alkenes and alkynes. Especially in the Heck reaction triflates proved to be superior to halides with respect to regio- and diastereoselectivity. Palladium-catalyzed carbon monoxide insertion of triflates leading to the corresponding esters or amides has found widespread application in natural product synthesis. Various deoxygenation procedures for ketones or phenols are based on the ease of removal of the trifluoromethanesulfoxy group

Tissue compensators with use of vinyl lead sheets for head and neck portals on 4-MV x rays

Tissue compensators made with a high atomic number material are compact and retain the skin-sparing effect of megavoltage beams. In this note, we have described the use of a commercially available vinyl lead as a material for tissue compensators for use with 4-MV beams on a Clinac-4/80. The dosimetric data obtained included the sheet's lead equivalence, thickness ratios, surface dose and buildup region, and transmission factors. The presence of a compensator did not alter the beam's skin-sparing effects. It was concluded that the vinyl lead sheets allowed an easy and rapid fabrication of a tissue compensator for head and neck portals of up to 15 X 15 cm.

Barium/cadmium for the stabilization of rigid vinyl for exterior applications

AbstractThe highly developed synergistic Ba/Cd stabilizer system for rigid vinyl use in exterior applications is the result of long lasting efforts in this field. By itself, cadmium carboxylate is ineffective because developing cadmium chloride acts as a strong Lewis acid and accelerates the decomposition of PVC. Barium carboxylate converts cadmium chloride formed back into the cadmium carboxylate. Addition of a chelating agent decidedly improves the stability of PVC. A certain ratio of Ba/Cd stabilizer must be retained; best ratio is 6 to 1. The addition of epoxidized soybean oil further improves both heat and light stability of these systems. More than 20 years performance of these formulations has been applied successfully. Increased stability of colored window profiles is effected with the addition of 0.5 parts of a UV absorber. Recommended pigmentations for masstone colored and tinted shades are provided in addition to formulations for white titanium dioxide pigmented profiles.