Abstract
The structural changes induced by microindentation on thermotropic liquid crystalline copolyester fibers of 4-hydroxybenzoic acid (HBA) and 2-hydroxy-6-naphthoic acid (HNA) have been investigated by scanning X-ray microdiffraction techniques at the ESRF microfocus beamline (ID13). A phase transformation is observed upon deformation from a pseudohexagonal lattice (PH) to two distinct orthorhombic phases (OI, OII). In addition, a strong texture is observed in the plastically deformed region as revealed by changes in the local orientation of the crystalline domains in the vicinity of the indenter tip and the appearance of reflections in specific directions only. This allows quantifying the extent of the deformation both across and along the fiber and also suggests the presence of complex structural processes occurring during indentation tests.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
