NDLI: Formation of non-graphitizing carbon fibers prepared from poly(p-phenylene terephthalamide) precursor fibers

Content Provider	Springer Nature Link
Author	Karacan, Ismail Erzurumluoğlu, Levent
Copyright Year	2015
Abstract	The effect of carbonization temperature on the structure and properties of poly(p-phenylene terephthalamide)- based carbon fibers from commercially available Twaron00AE; (PPTA) presursor is reported. Turbostratic PPTA-based carbon fibers were produced using a single step procedure in an inert atmosphere at temperatures ranging from 600 to 1100 °C. In the present study, fiber diameter, mass yield, density, elemental analysis, X-ray diffraction, Raman spectroscopy, tensile testing and electrical conductivity measurements were performed and evaluated to follow and monitor the properties and structural transformations of carbon fibers with rising temperature. The increase of heat-treatment temperature to 1100 °C. decreased the interlayer d-spacing (d$_{002}$) and increased the in-plane size (L$_{a}$) and thickness (L$_{c}$) of the graphene layers. The intensity ratios of D to G bands in the Raman spectra increased with rising temperature, suggesting, in agreement with the X-ray diffraction measurements, that the in-plane size (L$_{a}$) of the graphene planes increased with temperature. The density, carbon content, C/H ratio, apparent crystallite size (L$_{a}$ and L$_{c}$), electrical conductivity and tensile properties of the resultant carbon fibers were enhanced with rising temperature. It has been shown that the gage length of the carbon fibers tested has a significant effect on the tensile strength obtained. After taking into account the effects of gage length and porosity dependence, the carbonization of PPTA precursor fibers prepared at 1100 °C. gave a tensile strength of 191 MPa and a tensile modulus of 83 GPa, respectively.
Starting Page	961
Ending Page	974
Page Count	14
File Format	PDF
ISSN	12299197
Journal	Fibers and Polymers
Volume Number	16
Issue Number	5
e-ISSN	18750052
Language	English
Publisher	The Korean Fiber Society
Publisher Date	2015-06-06
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Twaron Carbonization X-ray diffraction Tensile properties Density Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering Polymers and Plastics

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