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IJC-A Vol.50A(06) [June 2011] >


Title: Thermoresponsive polystyrene-b-poly(N-isopropylacrylamide) copolymers by atom transfer radical polymerization
Authors: Shinde, Vaishali S
Girme, Madhavi R
Pawar, Vishwas U
Keywords: Polymerization
Atom transfer radical polymerization
Copolymers
Block copolymers
Thermoresponsive polymers
Poly(N-isopropylacrylamide)
Polystyrene
Issue Date: Jun-2011
Publisher: NISCAIR-CSIR, India
Abstract: Atom transfer radical polymerization has been employed for the polymerization of styrene initiated by ethyl-2-bromoisobutyrate in anisole at 100 °C with Cu(I)Br/PMDETA as the catalytic system. Kinetic investigations reveal that polymerization of styrene proceeds in a controlled manner with a first order plot of monomer consumption and with low polydispersity (Mw/Mn < 1.10). Well defined thermoresponsive diblock copolymer has been successfully synthesized using PS-Br macroinitiator. The amphilphilic behaviour of the diblock copolymers leads to phase separation resulting in two glass transition temperatures as detected by DSC. TGA analysis also shows the two-step decomposition.
Page(s): 781-787
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0975(Online); 0376-4710(Print)
Source:IJC-A Vol.50A(06) [June 2011]

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