نتایج جستجو برای: flammability
تعداد نتایج: 1088 فیلتر نتایج به سال:
ALCOHOLS The lower aliphatic alcohols are low to moderately toxic and usually have low vapor pressures, therefore inhalation toxicity is low. Vapors may be an irritant to the eyes and mucous membranes. Ingestion and absorption of the liquids through the skin can be a major health hazard. Lower alcohols containing double or triple bonds exhibit a greater degree of toxicity and irritation...
As new flame retardant (FR) approaches are developed they must be evaluated with conventional FR additives, processing additives, stabilizers, and fillers. In most cases this is done in a number of polymers, and a variety of processing conditions also must be optimized. Thus the development of new FR methods is a multi-parameter problem. A full-factorial approach to developing the structure–pro...
Cellulose nanofiber/AlOOH aerogel for flame retardant and thermal insulation was successfully prepared through a hydrothermal method. Their flame retardant and thermal insulation properties were investigated. The morphology image of the cellulose nanofiber/AlOOH exhibited spherical AlOOH with an average diameter of 0.5 μm that was wrapped by cellulose nanofiber or adhered to them. Cellulose nan...
The Chemical Events Working Group of the Global Health Security Initiative has developed a flexible screening tool for chemicals that present a risk when accidentally or deliberately released into the atmosphere. The tool is generic, semi-quantitative, independent of site, situation and scenario, encompasses all chemical hazards (toxicity, flammability and reactivity), and can be easily and qui...
Abstract In this work, the effect of functionalized hydroxyapatite (HAp-g-PEG) on thermal degradation behaviour and flammability polyoxymethylene copolymer (POM_C) was investigated. Organic–inorganic hybrid additive, obtained by grafting poly(ethylene glycol) HAp surface using 1,6-hexamethylene diisocyanate as a linker, has been incorporated into POM matrix through an extrusion process. TG anal...
............................................................................................... 4 Introduction .......................................................................................... 5 Bark Beetle Effects on Forest Structure, Composition and Fuel Bed Characteristics ........................................................ 10 Crown Fire Initiation and Spread .....................
With the phase-out of PentaBDE in 2004, alternative flame retardants are being used in polyurethane foam to meet flammability standards. However, insufficient information is available on the identity of the flame retardants currently in use. Baby products containing polyurethane foam must meet California state furniture flammability standards, which likely affects the use of flame retardants in...
Lithium-based batteries with improved safety performance are highly desired. At present, most hazard is the consequence of ignition and flammability organic liquid electrolytes. Dry ceramic-polymer composite electrolytes attractive for their merits non-flammability, reduced gas release, thermal stability, in addition to mechanical strength flexibility. We recently fabricated free-standing solid...
Development of safe electrolytes that are compatible with both lithium metal anodes and high-voltage cathodes can operate in a wide-temperature range is formidable, yet important challenge. Recently, new class based on liquefied gas solvents has shown promise addressing this issue. Concerns, however, have been raised the pressure, flammability low maximum operating temperature these systems. He...
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