Preparation and physical properties of the polyolefin nano-fibers by melt-electrospinning methods

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We prepared isotactic polypropylene (iPP) nanofibers by melt-electrospinning methods. The effects of spinning conditions such as electric field strength and temperature for various iPP samples with different molecular weights and molecular weight distribution on the thermal behavior and on tensile behavior were investigated. We found followings.The fine fibers with the diameter in the submicron order were successfully prepared by melt-electrospinning methods.The average of the fiber diameter decreased with weakening the electric field strength and with decreasing the molecular weight.The DSC charts of the prepared nanofibers showed the existence of the mesophase structure.The iPP chains in the nanofibers were oriented to the spinning direction, which causes the high mechanical strength with the low strain at break.