کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5185065 1381065 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of drawn monofilaments of liquid crystalline polymer/carbon nanoparticle composites correlated to nematic order
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Characterization of drawn monofilaments of liquid crystalline polymer/carbon nanoparticle composites correlated to nematic order
چکیده انگلیسی

In this study a nanocomposite monofilament composed of a nematic thermotropic liquid crystalline polymer (TLCP) mixed with 1.5 wt.% of carbon nanoparticles (CNP) was prepared by melt extrusion. The nanoparticles had either a fibrous (VGCF) or layered (GNP) geometry. The tensile strength and modulus of the fibers increased with the draw down ratio of the filament; a positive effect on the tensile modulus is displayed by fibrous CNP, achieving values higher than those of high property organic fibers utilized as reinforcement for composite materials. Thermotropic transitions were characterized by DSC and in situ synchrotron WAXD. In particular, it was shown that the breadth of the temperature span of the crystalline-nematic transition correlated inversely with the draw down ratio. At high draw down ratio, addition of CNP also increased the relative amount of oriented polymer chains and contributed to sharpening of the mesomorphic transition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 50, Issue 7, 20 March 2009, Pages 1797-1804
نویسندگان
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