Effect of Varying Additives on Aqueous Solution of PEO-PPO-PEO Tri-block Copolymer

摘要

The effect of addition of salt potassium chloride (KCl) and detergent sodium dodecyl sulfate (SDS) on the aqueous solution of PEO-PPO-PEO (polyethylene oxide-polypropylene oxide-polyethylene oxide) tri-block copolymer, i.e. (EO)103(PO)39(EO)103 Pluronics F88 has been carried out. The concentration of F88 was fixed at 5 wt-% and the concentrations of KCl and SDS were varying in the range of 0.05 to 1.5 M and 0.001 to 0.125 M, respectively. Small-angle neutron scattering (SANS) experiments were carried out using 36 m SANS spectrometer at Neutron Scattering Laboratory, Serpong (SMARTer), Indonesia. The wavelength of neutron beam was 3.90 ? and the experiments were performed at two different sample-to-detector distances of 2 m and 8 m. A 3He of 128×128 two-dimensional position sensitive detector (2D-PSD) with a beam stopper of 60 mm in diameter was used to detect the scattered beam in the range of 0.008