Study of the Effect of a Polymeric Compatibilizing Agent on the Flame Retardancy and Tensile Properties of High Density Polyethylene/Magnesium Hydroxide Compositions

Abstract

The effect of using a compatibilizer, such as maleic anhydride grafted polyethylene (PEgMA), on the flame retardancy and mechanical (tensile) properties of HDPE nanocomposites with silane modified Mg(OH)2 was studied. The silane modification of Mg(OH)2 was confirmed by FTIR. Filler dispersion was characterized by scanning electron microscopy in transmission mode (STEM) and the effect of filler on mechanical properties was also evaluated. The flame retardant properties were evaluated by flammability tests (Underwriters Laboratory – UL‐94) and cone calorimeter. The mechanism by which the use of PEgMA compatibilizer improves the flame retardancy of HDPE/Mg(OH)2 was studied. Through the simultaneous TGAIR analysis, it was found that when using PEgMA, the flame retardant properties of HDPE/Mg(OH)2 are modified, due to the generation of volatile compounds in the thermal decomposition.

Properties of Chemically Modified (Selected Silanes) Lignocellulosic Filler and Its Application in Natural Rubber Biocomposites

“…Silanes containing different species can show variable activity in the elastomer cross-linking process. The modifications of compatibilizing agents used so far in studies on polymer biocomposites mainly included modification of the lignocellulosic material for which the matrices were thermoplastics, such as polypropylene (PP) and polyethylene (PE) [ 17 ]. Natural rubber has completely different material features, characteristics of the spatial structure, and manner of interactions with the filler.…”

Improvement of mechanical properties of highly ZnO‐filled polyethylene composites by dual‐compatibilizer for hydrogen sulfide permeation inhibition

“…11,15,23,24 Generation of reactive functional groups on the surface of inorganic fillers via modification by polydopamine or coupling agents such as silanes and introduction of maleic anhydride-grafted copolymers as compatibilizers are able to enhance the dispersion of the inorganic particles. 12,[23][24][25][26][27][28][29] Moreover, application of appropriate compatibilizers can increase the interfacial adhesion between the fillers and the polymer, which is favorable to improvement of tensile properties of composites. 28,29 For example, the tensile strength of 80 wt% ultra-highly wood fiber-filled polyethylene composites can be increased by 224% via using maleic anhydride grafted polyethylene (PE-g-MAH) as the compatibilizer.…”

“…On other hand, in order to obtain good H 2 S‐resistant ability, it is essential to introduce a great amount of fillers, which are not conducive to well dispersion in the polymeric matrix and acquirement of sufficient mechanical properties and high gas barrier properties 11,15,23,24 . Generation of reactive functional groups on the surface of inorganic fillers via modification by polydopamine or coupling agents such as silanes and introduction of maleic anhydride‐grafted copolymers as compatibilizers are able to enhance the dispersion of the inorganic particles 12,23–29 . Moreover, application of appropriate compatibilizers can increase the interfacial adhesion between the fillers and the polymer, which is favorable to improvement of tensile properties of composites 28,29 .…”