Abstract
The positron annihilation lifetime spectroscopy (PALS) was used to investigate the properties of Phase Change Material (PCM): the Micronal® DS 5001 X microcapsules. The microcapsules are composed of a polymer capsule shell and a paraffin core. Two groups of free volumes were observed: those producing the long-lived component can be ascribed to the polymer, the other to the mixed alkanes. Both o-Ps components show the known effect of the intensity rise with positron irradiation time. At temperatures below -3°C we have observed the short lifetime as for alkane rigid phase, then the rotator-like phase preceded liquid phase. This form of temperature dependence of PAL spectra is discussed. There was no destructive effect of temperature. The PALS results were compared with those obtained by scanning electron microscopy.
Published Version (
Free)
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.
