Flammability of butadiene-acrylonitrile rubbers

Żukowski

Bradło

2016

This paper presents the results of testing the flammability of silicone rubber composites containing fillers, such as cenospheres, cenospheres covered with iron, attapulgite, wollastonite, aluminum hydroxide and silica. In order to increase the insulating character of boundary layer, boron trioxide was incorporated into the composites of silicone rubber as a ceramization additive. The flammability of the composites was tested with the use of a cone calorimeter. The composition of the gaseous products of thermal decomposition was determined quantitatively and qualitatively in the system with intensive stirring in the fluidal bed, under isothermal conditions at temperatures T = 550, 650 and 750°C. All the test results show that the fillers used, especially with ceramization additives considerably reduce the fire hazard of silicone rubber composites containing these fillers.

Section: Flammability Of Silicone Rubber Compositesmentioning

confidence: 94%

Effect of cenospheric fillers on the flammability and fire hazard of silicone rubber composites

Żukowski

Bradło

2016

“…The fire hazard of the elastomeric materials under investigation was determined by the method of cone calorimeter using an apparatus from Atlas Electric Devices Company [2,8]. The results obtained by this method were used to determine the toxicity of the products of thermal decomposition and combustion of elastomers, taking into account the emission of carbon oxide and dioxide (RTFH co=co 2 ) as well as compounds such as HCN, NO, NO 2 , SO 2 , CO, and CO 2 at temperatures of 450, 550, and 750°C, according to Standard PN-B-02855:1988 (W LC50SM ) [2].…”

Section: Methodsmentioning

confidence: 99%

Flammability of vulcanizates of diene rubbers

Janowska

Kucharska-Jastrząbek

et al. 2011

This article discusses the effect of the crosslinking of diene elastomers (BR, SBR, NBR), with the use of an organic peroxide or sulfur, on their flammability and fire hazard. Flammability tests were carried out by the method of oxygen index, combustion time (in air) and ignition temperature measurements. Fire hazard was determined on the basis of test results obtained by means of a cone calorimeter. Toxicometric coefficients (RTFH co=co 2 and W LC50SM ) and the emission of polycyclic aromatic hydrocarbons (PAH) were determined. Test results were interpreted from the point of view of the chemical constitution of elastomer macromolecules as well as the structure of its network structure.

“…For flammability tests, samples of dimensions 100 9 10 9 4 mm were prepared. Using a constant rate of nitrogen flow amounting to 400 l/h, the oxygen flow rate was selected so that a 50 mm sample length burned within time t = 180 s. The sample top was ignited for 15 s by means of a gas burner supplied with a propane-butane mixture [4][5][6]. The value of oxygen index (OI) was expressed in fractions on the basis of the oxygen volume fraction in the oxygen-nitrogen mixture.…”

Section: Methodsmentioning

confidence: 99%

“…The determinations of flammability in air were also performed, measuring the combustion time of samples whose shape, dimensions, and location as well as ignition time were the same as those in the case of the oxygen index method [4][5][6]. It was quite difficult to prepare shaped samples for flammability measurements due to their adhesion to the metal mold, but this problem was solved by subjecting the elastomers tested to slight cross-linking by means of dicumyl oxide.…”

Section: Methodsmentioning

confidence: 99%

Flammability of diene rubbers

Janowska

Kucharska-Jastrząbek

et al. 2010

This paper presents the results of testing the flammability and fire hazard of butadiene (BR), butadieneacrylonitrile (NBR) and butadiene-styrene (SBR) rubbers with the use of oxygen index test, ignition temperature measurement, cone calorimetry and inverse liquid chromatography. Toxicometric indices, RTFH CO/CO2 , W LC50SM and the concentration of polycyclic aromatic hydrocarbons (PAH) have been determined. The results obtained have been interpreted from the point of view of the chemical constitution of the polymers tested.