Premium
Preparation of Single Chain Nanoparticles via Photoinduced Double Collapse Process
Author(s) -
Dashan Irem,
Balta Demet Karaca,
Temel Binnur Aydogan,
Temel Gokhan
Publication year - 2019
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201900116
Subject(s) - polystyrene , benzophenone , azide , polymer , folding (dsp implementation) , polymer chemistry , intramolecular force , chemistry , nanoparticle , photochemistry , side chain , glass transition , materials science , nanotechnology , organic chemistry , electrical engineering , engineering
A straightforward method is described to achieve polymeric nanoparticles by double folding of single linear chains. The side chain functional polystyrene with controlled molecular weight is converted to pendant azide and benzophenone motifs via postmodification reactions. Resulting functionalized chains undergo intramolecular crosslinking upon ultraviolet (UV) illumination using simultaneous and subsequent pathways at a dilute concentration. Particle size of nanoparticles can be tuned by changing the degree of crosslinking using a second folding process. Obtained single and double collapsed chains indicate higher glass transition temperatures and lower hydrodynamic radii compared to their intermediates. To our knowledge, the combination of photoinduced azide crosslinking and radical coupling processes is the first attempt to prepare double folding single polymer chains.