Dielectric properties of generation 3 PAMAM dendrimer nanocomposites

Sanja Ristić, Jovan Mijovic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Broadband dielectric relaxation spectroscopy (DRS) was employed to study molecular dynamics of blends composed of generation 3 poly(amidoamine) (PAMAM) dendrimers with ethylenediamine core and amino surface groups and four linear polymers: polypropylene oxide) - PPO, two block copolymers, polypropylene oxide)/poly(ethylene oxide) - PPO/PEO with different mol ratios (29/6 and 10/31) and polyethylene oxide) - PEO. The results were generated over a broad range of frequency. Dielectric spectra of dendrimers in PPO matrix reveal slight shift of normal and segmental processes to higher frequency with increasing concentration of dendrimers. In the 29PPO/6PEO matrix, no effect of concentration on the average relaxation time for normal and segmental processes was observed. In the 10PPO/31PEO matrix the relaxation time of the segmental process increases with increasing dendrimer concentration, while in the PEO matrix, local processes in dendrimers slow down. A detailed analysis of the effect of concentration of dendrimers and morphology of polymer matrix on the dielectric properties of dendrimer nanocomposites will be presented.

Original languageEnglish (US)
Title of host publicationIVth International Conference on Times of Polymers (TOP) and Composites
Pages6-9
Number of pages4
Volume1042
DOIs
StatePublished - 2008
Event4th International Conference on Times of Polymers (TOP) and Composites - Ischia, Italy
Duration: Sep 21 2008Sep 24 2008

Other

Other4th International Conference on Times of Polymers (TOP) and Composites
CountryItaly
CityIschia
Period9/21/089/24/08

Fingerprint

dendrimers
dielectric properties
nanocomposites
matrices
polypropylene
oxides
relaxation time
polymers
ethylenediamine
ethylene oxide
block copolymers
polyethylenes
molecular dynamics
broadband
shift
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ristić, S., & Mijovic, J. (2008). Dielectric properties of generation 3 PAMAM dendrimer nanocomposites. In IVth International Conference on Times of Polymers (TOP) and Composites (Vol. 1042, pp. 6-9) https://doi.org/10.1063/1.2989077

Dielectric properties of generation 3 PAMAM dendrimer nanocomposites. / Ristić, Sanja; Mijovic, Jovan.

IVth International Conference on Times of Polymers (TOP) and Composites. Vol. 1042 2008. p. 6-9.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ristić, S & Mijovic, J 2008, Dielectric properties of generation 3 PAMAM dendrimer nanocomposites. in IVth International Conference on Times of Polymers (TOP) and Composites. vol. 1042, pp. 6-9, 4th International Conference on Times of Polymers (TOP) and Composites, Ischia, Italy, 9/21/08. https://doi.org/10.1063/1.2989077
Ristić S, Mijovic J. Dielectric properties of generation 3 PAMAM dendrimer nanocomposites. In IVth International Conference on Times of Polymers (TOP) and Composites. Vol. 1042. 2008. p. 6-9 https://doi.org/10.1063/1.2989077
Ristić, Sanja ; Mijovic, Jovan. / Dielectric properties of generation 3 PAMAM dendrimer nanocomposites. IVth International Conference on Times of Polymers (TOP) and Composites. Vol. 1042 2008. pp. 6-9
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