ABOUT INDEXING EDITORIAL BOARD ARCHIVES AUTHOR GUIDELINES SUBMIT PAPER NEWS, EVENTS AUTHOR'S PAGE CONTACT
Materiale Plastice
Cite as: Mater. Plast.
https://doi.org/10.37358/Mat.Plast.1964

OSIM Nr. R102356
ISSN Print 0025-5289
ISSN Online 2668-8220
Materiale Plastice - Latest Issue

Latest Issue >>>
ARCHIVES
   Volume 61, 2024
   Volume 60, 2023
   Volume 59, 2022
   Volume 58, 2021
   Volume 57, 2020
   Volume 56, 2019
   Volume 55, 2018
   Volume 54, 2017
   Volume 53, 2016
   Volume 52, 2015
   Volume 51, 2014
   Volume 50, 2013
   Volume 49, 2012
   Volume 48, 2011
   Volume 47, 2010
   Volume 46, 2009
   Volume 45, 2008
   Volume 44, 2007
   Volume 43, 2006
   Volume 42, 2005
   Volume 41, 2004
   Volume 40, 2003
 
<<<< back

Materiale Plastice (Mater. Plast.), Year 2013, Volume 50, Issue 1,





SILVIA GRAMA, IOANA-ANDREEA MOLEAVIN, ANCA HODOROG-RUSU, NICOLAE HURDUC, IRINA PRISACARU, CONSTANTA IBANESCU


Abstract:
Photosensitive polymers based on polysiloxanes substituted with different azo and quaternary ammonium groups were synthesized and characterized. The chemical structure of the synthesized polymers was confirmed using 1H-NMR spectroscopy. The photochromic behaviour was evaluated as a result of the interaction with UV light. The micellar aggregation/disaggregation capacity of the polymers was investigated using fluorescence spectroscopy and dynamic light scattering techniques. All the synthesized amphiphilic polymers are able to generate micelles, the critical concentration of aggregation values being situated in the domain (3-13) x 10-3 g/L. The morphology of the micellar aggregates is fundamentally influenced by the polymer chemical structure. If in the case of azobenzene and azo-5-crwon-15-ether groups it is possible to obtain 35-155 nm diameter individual micelles, for the azo-6-crown-18-ether group, only small aggregates with diameters below 10 nm can be obtained. The micelle’s disaggregation capacity as a consequence of UV irradiation is strongly affected by the hydrophilic/hydrophobic ratio, as well as the chemical structure of the azo groups. Keywords: azobenzene, polysiloxane, photosensitive micelles



Issue: 2013 Volume 50, Issue 1
Pages:
download pdf   Download Pdf Article
Creative Commons License
This article is published under the Creative Commons Attribution 4.0 International License


Downloads number: 0
<<<< back
 
  Search Authors
Crossref Member Badge
 DOI  logo
 Gold Open Access | Source=http://www.plos.org/  | Author=art designer at PLoS
Creative Commons License