2010 Fiscal Year Final Research Report

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

Research Project

Project/Area Number	21750215
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Polymer/Textile materials
Research Institution	Kanazawa University
Principal Investigator	KAWAMURA Takanobu Kanazawa University, 自然システム学系, 助教 (20377401)
Project Period (FY)	2009 – 2010
Keywords	繊維材料 / ポリオレフィン / 溶融エレクトロスピニング
Research Abstract	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.