Now showing items 1-2 of 2

  • Effect of LCST on the swelling of PAAm-NIPA copolymers: a fluorescence study 

    Authors:Evingür, Gülşen Akin; Pekcan, Önder
    Publisher and Date:(Springer, 2012)
    Temperature sensitive copolymers were prepared by free radical crosslinking copolymerization in aqueous solution with different molar percentage of N-isopropylacrylamide (NIPA) and acrylamide (AAm) monomers. NN'-methylenebis (acrylamide) (BIS) and ammonium persulfate (APS) were used as a crosslinker and an initiator respectively. The steady-state fluorescence (SSF) technique was used to determine the low critical phase transition temperature (LCST) for PAAm-NIPA copolymers. Swelling experiments ...

  • Temperature Effect on the Elasticity of Acrylamide-n-Isopropylacrylamide Copolymers 

    Authors:Evingür, Gülşen Akin; Pekcan, Önder
    Publisher and Date:(Taylor & Francis Inc, 2018)
    Acrylamide (AAm) - N-isopropylacrylamide (NIPA) copolymers were prepared via free radical crosslinking copolymerization with various weight percentages (wt%) of AAm and NIPA. The temperature dependence of the compressive elastic modulus G and toughness U-TU- of the PAAm- NIPA copolymers due to a volume phase transition was found using a compressive testing technique. It was observed that the compressive elastic modulus increased comprehensively when the temperature was increased between 30 degrees ...