Ultrasonic and dielectric studies of polymer PDMS composites with ZnO and onion-like carbons nanoinclusions

2015 Global Conference on Polymer and Composite Materials

材料科学;化学

Samulionis, V.^1 ; Macutkevic, J.^1 ; Banys, J.^1 ; Belovickis, J.^1 ; Shenderova, O.^2

Physics Faculty, Vilnius University, Sauletekio al. 9/3, Vilnius

10222, Lithuania^1

International Technology Center, Raleigh

NC

27715, United States^2

关键词: Dielectric studies;    Methylsiloxane;    Nano inclusion;    Onion-like carbon;    Transition regions;    Ultrasonic attenuation;    Vogel-Fulcher law;    Zinc oxide (ZnO);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/87/1/012010/pdf
DOI  :  10.1088/1757-899X/87/1/012010

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The ultrasonic and dielectric temperature investigations were performed in polydi- methylsiloxane (PDMS) with zinc oxide (ZnO) and onion-like carbon (OLC) nanocomposites. In the glass transition region, the ultrasonic velocity dispersion and large ultrasonic attenuation maxima were observed. The positions of ultrasonic attenuation peaks were slightly shifted to higher temperatures after doping PDMS with OLC and ZnO nanoparticles. The ultrasonic relaxation was compared to that of dielectric and such behaviour was described by Vogel- Fulcher law. The upshift of the glass transition temperature with addition of nanoparticles was confirmed by both methods. The additional increase of ultrasonic attenuation in composites doped with OLC and ZnO was observed at room temperature and such behaviour we attributed to ultrasound-nanofiller interaction in polymer matrix.