نتایج جستجو برای: polyvinyl chloride pvc
تعداد نتایج: 94770 فیلتر نتایج به سال:
To improve the performance of polyvinyl chloride (PVC), composites incorporating polyvinyl chloride (PVC), attapulgite nanoparticles (ANPs), and microcrystalline cellulose (MCC) were successfully prepared. The composites had higher vicat softening temperatures (VSTs) and the MCC had a great influence on mechanical properties of the composites. When MCC was added from 0 to 5 per hundred parts of...
Nano-silicon-based disordered carbon composites prepared by mechanical milling and pyrolysis have been examined as anodes of a lithium ion cell. Electrochemical measurements show that the charge–discharge capacity of disordered carbon composites incorporating both silicon-polyparaphenylene (Si-PPP) and silicon-polyvinyl chloride (Si-PVC) with differing silicon contents, decreases with increasin...
Suffolk County, NY, on March 29 passed a law banning the use of plastic grocery bags and other plastic food containers starting in July, 1989. The law forbids the use of polystyrene foam (PS foam) and polyvinyl chloride (PVC) for food packaging in restaurants, bars, delis, roadside stands, grocery stores, and other retail food establishments. PS foam is used in coffee cups, egg cartons and meat...
An approach to the assessment of fumes produced in laser material processing is presented. The subsequent design of the fume containment system and sampling strategy is detailed. Polyvinyl chloride (PVC) has been selected for investigation and the complexity resulting from the plethora of additives is discussed. Qualitative results from the preliminary studies of CO2 laser cutting of PVC are pr...
The case history is presented of a 58 year old man who was exposed to thermoplastic dusts, mainly polyvinyl chloride (PVC), for 10 years. Radiography and high resolution computed tomographic scans of the lungs suggested both pneumoconiotic and scleroderma-like lesions. Transbronchial biopsy revealed foreign body granulomas with macrophages laden with birefringent inclusions which ultrastructura...
in this research, the tacticity and microstructure of polyvinyl chloride (pvc) were studied through back bone methylene and methine carbons and protons splitting by carbon (13c nmr), proton (1h nmr) and two-dimensional (2dnmr) nulear magnetic resonance spectroscopy in deuterated etrahydrofuran.polyvinyl chloride was synthesized by emulsion polymerization of vinyl chloride (vcm) under pressure t...
Polyvinyl chloride (PVC) is one of the most widely used thermoplastics but also a material concern because generation and release harmful chemicals during its life cycle.
ZnO/Ag nanocomposites coated with polyvinyl chloride (PVC) were prepared by chemical reduction method, for anti-infection biomaterial application. There is a growing interest in attempts in using biomolecular as the templates to grow inorganic nanocomposites in controlled morphology and structure. By optimizing the experiment conditions, we successfully fabricated high yield of ZnO/Ag nanocompo...
In water distribution systems containing PVC pipe manufactured in the ‘‘early era’’ ~prior to 1977!, vinyl chloride can leach into drinking water resulting in vinyl chloride concentrations exceeding the 2 mg•L maximum contaminant level. Field testing of dead-end segments of water distribution systems consisting of early-era PVC pipe was conducted to examine their initial intrapipe vinyl chlorid...
BACKGROUND Plastics are a common cause of occupational skin disorders such as irritant or allergic contact dermatitis (ACD). CASE REPORT We report a case of occupational ACD due to a polyvinyl chloride (PVC) plastic table cover used as a mouse pad for which we performed patch tests and obtained positive patch tests for the PVC table cover. Composition testing revealed the presence of phthalat...
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