XRD,SAXS, and PALS investigations of three different polymers reinforced with tetraoctylammonium exchanged montmorillonite |
| |
| Authors: | Luboš Jankovič Karol Végsö Peter Šiffalovič Ondrej Šauša Lubomír Čaplovič Mária Čaplovičová |
| |
| Institution: | 1. Institute of Inorganic Chemistry, Slovak Academy of Sciences, Bratislava, SlovakiaLubos.Jankovic@savba.sk;3. Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia;4. Faculty of Materials Science and Technology, Slovak University of Technology, Trnava, Slovakia;5. STU Centre for Nanodiagnostics, Slovak University of Technology, Bratislava, Slovakia |
| |
| Abstract: | Three different polymer nanocomposites were prepared using clay modified with tetraoctylammonium (4C8) surfactant. The dispersion of clay silicate layers was studied using X-ray diffraction and small-angle scattering. Free-volume cavity sizes were studied with positron annihilation lifetime spectroscopy. Scattering methods confirmed disruption of all polymer lamellae organization upon organoclay addition and the creation of partially intercalated systems for polyamide and polycaprolactone. The presence of organoclay in the polymers enlarges the lower value of average positronium lifetime τ3 of polyamide and reduces the higher value of τ3 for polycaprolactone and polyethylene. |
| |
| Keywords: | Clay composites polyamides positron X-ray |
|
|
