Abstract
Abstract The volume distribution and molecular dynamics of spin-probe (nitroxyl radical) in the gel-crystallized UHMWPE of different draw ratios (DR = 12,100) have been investigated. The spin-probes were found to occupy approximately 50% of the polymer volume in the necked samples and 20–30% in the samples drawn up to DR = 100. The mobility of the spin-probe in the samples studied is higher than that in the drawn and even in the undrawn samples of conventional melt-crystallized PE. This fact along with a low value of activation energy of spin-probe rotation (less than 10 kJ/mole) enables a conclusion that the regions of spin-probe localization are those with a significantly reduced density, such as pores, for examples. The analysis of the data obtained and the results of the structural study of the gel-crystallized samples by a SAXS and WAXS technique suggest that these pores are localized in interfibrillar space.
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.
