Mechanochemical Degradation of Glass Fibre Reinforced Polypropylene Melts During Flow

摘要: In this work, a study of the mechanochemical degradation short glass fibre reinforced polypropylene is undertaken. The motivation for two fold. Firstly, it necessary to assess extent and origin during processing as results in deterioration physical properties finished product if these materials are be recycled after processing. Secondly, polymers contain additional ingredients, namely, fibres silane coupling agents which used coat fibres. presence likely modify stress field experienced by macromolecules therefore mechanically induced chain scission will effected. It well known that distribution on macromolecule not uniform concentration either directly causes scission, or thermally activated may accelerated stress. Both thermal mechanical occur polymers. At low temperatures, significant, but there difficulties distinguishing stress-induced degradation. However, some where dominant process (i.e., polyisobutene) polystyrene. Random occurs while selective usually takes place degradation, macromolecular chains rupture mainly near middle maximum.