NANOP ARTICLE INDUCED RADIAL STRUCTURAL GRADIENT IN MELT-SPUN POLYPROPYLENE/PPGMA FIBERS

摘要

The role of nanoparticles on the evolution of structural hierarchy in clay and polymer for fibers was elucidated. The stream of polypropylene nanocomposite that exited the die without application of a take up presented orientation gradient in the radial direction with the broad surfaces of the clay parallel to the surface of the fibers. The polymer exhibited high preferential orientation levels in the edge of the fiber. With take up, the clay particles enhanced the orientation of amorphous and crystalline phases. Measurements of the clay orientation revealed that the nanoplatelets contributed positively to the birefringence of the fibers.