Premium
Synthesis, characterization, and application of novel amphiphilic poly( D ‐gluconamidoethyl methacrylate)‐ b ‐polyurethane‐ b ‐ poly( D ‐gluconamidoethyl methacrylate) triblock copolymers
Author(s) -
Vishwakarma Niraj Kumar,
Mishra Avnish Kumar,
Mishra Abhinay,
Paira Tapas,
Patel Vijay Kumar,
Biswas Chandra Sekhar,
Mandal Tarun Kumar,
Maiti Pralay,
Ray Biswajit
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38279
Subject(s) - copolymer , polymer chemistry , atom transfer radical polymerization , materials science , methacrylate , micelle , dynamic light scattering , polymerization , polyurethane , amphiphile , methyl methacrylate , nanoparticle , chemistry , polymer , organic chemistry , nanotechnology , aqueous solution , composite material
Novel amphiphilic ABA‐type poly( D ‐gluconamidoethyl methacrylate)‐ b ‐polyurethane‐ b ‐poly( D ‐gluconamidoethyl methacrylate) (PGAMA‐ b ‐PU‐ b ‐PGAMA) tri‐block copolymers were successfully synthesized via the combination of the step‐growth and copper‐catalyzed atom transfer radical polymerization (ATRP). Dihydroxy polyurethane (HO‐PU‐OH) was synthesized by the step‐growth polymerization of hexamethylene diisocyanate with poly(tetramethylene glycol). PGAMA‐ b ‐PU‐ b ‐PGAMA block copolymers were synthesized via copper‐catalyzed ATRP of GAMA in N, N ‐dimethyl formamide at 20°C in the presence of 2, 2′‐bipyridyl using Br‐PU‐Br as macroinitiator and characterized by 1 H‐NMR spectroscopy and GPC. The resulting block copolymer forms spherical micelles in water as observed in TEM study, and also supported by 1 H NMR spectroscopy and light scattering. Miceller size increases with increase in hydrophilic PGAMA chain length as revealed by DLS study. The critical micellar concentration values of the resulting block copolymers increased with the increase of the chain length of the PGAMA block. Thermal properties of these block copolymers were studied by thermo‐gravimetric analysis, and differential scanning calorimetric study. Spherical Ag‐nanoparticles were successfully synthesized using these block copolymers as stabilizer. The dimension of Ag nanoparticle was tailored by altering the chain length of the hydrophilic block of the copolymer. A mechanism has been proposed for the formation of stable and regulated Ag nanoparticle using various chain length of hydrophilic PGAMA block of the tri‐block copolymer. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013