Investigation of flame retardancy and physical–mechanical properties of zinc borate and aluminum hydroxide propylene composites

Mechanical properties and flammability of sisal/PP composites: Effect of flame retardant type and content

“…Many studies have demon- strated advantages of using a combination of zinc borate with other flame retardants in several kinds of polymers, e.g. EVA, PP, LLDPE [16][17][18][19][20]. This is because the degradation of zinc borate resulted in a vitreous protective layer which could act as a physical barrier and a glassy cage for polymer chains [11,14].…”

Alüminyum Eloksal Atıklarının Yangın Geciktirici Olarak Değerlendirilmesi

“…Organik bileşiklerin aksine, inorganik alev geciktiriciler ısı etkisiyle buharlaşmaz; bunun yerine H2O gibi zararsız, CO2 gibi daha az zararlı gazlar açığa çıkararak bozunurlar. En çok kullanılan inorganik alev geciktiriciler magnezyum hidroksit, aluminyum trihidrat ve çinkoborattır [7][8][9][10]. Ayrıca alev geciktirici maddelerin malzemeye katılması malzemenin fiziksel ve kimyasal özelliklerine etki edeceğinden katılma oranları önemlidir, belirlenmesi gerekir [11].…”

Extrudate swell behavior of polypropylene composites filled with microencapsulated red phosphorus

“…[8][9][10][11] Aluminum hydroxide (Al(OH) 3 ) and magnesium hydroxide (Mg(OH) 2 ), the kind of halogen-free flame retardants, have been widely used in various polymers such as PP, because of its triple functions: filler, flame retardant, and smoke suppressant. [12][13][14] Microencapsulated red phosphorus (MRP) is a kind of synergist for flame retardant and usually used along with Al(OH) 3 and Mg(OH) 2 in producing flame retardant filled polymer composites. [15][16][17][18] More recently, Liang et al 19 investigated the effects of extrusion conditions on the extrudate swell behavior during die flow of PP/ Al(OH) 3 /Mg(OH) 2 composites; the results showed that the extrudate swell ratio of the composite melts decreased linearly with an increase of the filler concentration and increased approximately linearly with increase of the particle size of the flame retardant.…”