Fiber Formation Properties of Mesogen-jacketed Liquid Crystalline Polymer PBPCS
The fiber formation properties of Mesogen-jacketed liquid crystalline polymer(MJLCP)PBPCS have been investigated in detail in this paper. During the steady shear flow of melt spinning, Dewitt model and ARES experiments both showed shear-thinning behavior and structural viscous characteristics, therefore, spinning at low shear rate was performed in order not to destroy the self-assembly structure of PBPCS. During the uniaxial elongation flow of melt spinning, according to the Lodge network model and long relaxation time of PBPCS, spinning was performed at slow stretching rate. At the same time, DMA, 2D WAXD, SEM were applied to investigate the post-drawing of PBPCS original fiber, after 5 times drawing treatment, the orientation degree increased from 64％ to 85％, the tensile strength and elongation at break were improved from 10Mpa to 35Mpa and from 6％ to 15％, respectively. However, due to the limitation of maximum draw ratio, 2D WAXD experiments demonstrated molecule chain slippage of self-assembly PBPC, S as the draw ratio was 7, so the fiber formation of PBPCS is performed under low shear rate and slow stretching rate, the suitable post-drawing ratio is 5, this work is the basis for PBPCS potentially used for biomedical material.
fiber formation MJLCP shear drawing self-assembly
WAN Li-ying LI De-li ZHU Mei-fang
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua university, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua university,
国际会议
2010 International Forum on Biomedical Textile Materials(2010国际纺织生物医用论坛)
上海
英文
316-321
2010-05-28（万方平台首次上网日期，不代表论文的发表时间）