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Nano‐Templates from Thermoresponsive Poly(ethoxytriethyleneglycol acrylate) for Polymeric Nano‐Capsules
Author(s) -
Dimitrov Philip,
Toncheva Natalia,
Weda Pawel,
Rangelov Stanislav,
Trzebicka Barbara,
Dworak Andrzej,
Tsvetanov Christo B.
Publication year - 2009
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200950411
Subject(s) - lower critical solution temperature , dynamic light scattering , acrylate , materials science , copolymer , methacrylate , polymer chemistry , chemical engineering , nano , aqueous solution , nanogel , polymer , nanoparticle , nanotechnology , chemistry , composite material , organic chemistry , drug delivery , engineering
Temperature responsive poly(ethoxytriethyleneglycol acrylate) (PETEGA) of Mn = 8000 and M w /M n = 2.30 was synthesized by ATRP. Dilute aqueous solutions of PETEGA exhibit lower critical solution temperature (LCST) at around 34 °C. We found that PETEGA can form nano‐sized uniform colloidal aggregates (50‐200 nm) above LCST either with or without an additional surfactant. Therefore PETEGA nano‐aggregates were used as templates for the seeded free radical copolymerization of acrylamides or methacrylates together with a cross‐linker to form acrylamide or methacrylate based core‐shell particles. The formation of the PETEGA templates was investigated by dynamic light scattering (DLS) in order to find optimal conditions for obtaining narrow dispersed aggregates of desired sub‐micron dimensions. Core‐shell particles were characterized by DLS and scanning electron microscopy.