Fabrication and Characterization of Isotactic Polypropylene (iPP) Nanofibers from Immiscible Blends with Polylactic Acid (PLA)

摘要：

In this article, binary blends of polylactic acid (PLA) and isotactic polypropylene (iPP) were prepared via melt blending in a co-rotating twin-screw extruder. Miscibility, thermal properties and crystallization behaviors of PLA/iPP blends were investigated using dynamic mechanical analysis (DMA), differential scanning calorimeter (DSC), and wide angle X-ray diffraction (WXRD). As observed from the tanδ curves in DMA and the glass transition temperatures in DSC, experimental results indicated that the blends were thermodynamically immiscible. Moreover, the iPP microfibrils were prepared from PLA/iPP immiscible blends and subsequent extraction removal of PLA matrix. The effects of PLA/iPP blend ratio and melt viscosity on the microfibrillar morphology of iPP nanofibers were analyzed using scanning electron microscope (SEM) and dynamical rheometer. The elasticity ratio was proposed to play an important role together with the viscosity on the phase morphology because PLA/iPP blends presented a high viscosity ratio between two components.

关键词： PLA/iPP blends characterization nanofibers morphology

作者: LIU Peng OUYANG Yang XIAO Ru

作者单位: State Key Lab for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China

会议类型: 国际会议

会议名称: 2010 International Forum on Biomedical Textile Materials(2010国际纺织生物医用论坛)

会议地点: 上海

会议语种:英文

页码: 298-302

在线出版日期: 2010-05-28（万方平台首次上网日期，不代表论文的发表时间）