Synthesis and Characterization of Amphiphilic PEG Based Polymers and Their Self Assembling Behavior |
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| Authors: | Anu Kumari Najam A Shakil Braj B Singh Arthur C Watterson |
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| Institution: | 1. Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi, India;2. Institute for Nano-Science and Engineering Technology, Department of Chemistry, University of Massachusetts Lowell, Lowell, MA-01854 |
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| Abstract: | Sixteen amphiphilic polymers were synthesized using poly(ethylene glycols) (PEGs) of different molecular weights, viz. 1000, 1500, 2000 and 4000 as hydrophilic block and linkers namely azelaic acid, suberic acid, terephthalic acid and glycolic acid as hydrophobic block in the presence of catalyst conc. H2SO4 out of which four with glycolic acid as linker are new. Synthesized polymers were characterized by using 1H-NMR, 13C-NMR and IR spectroscopy. Micellar sizes of the polymers were determined using Dynamic Light Scattering (DLS) technique which ranged from 32.1–262.0 nm and confirmed by Transmission Electron Microscope (TEM) analysis. Molecular weights were determined using HORIBA SZ-100 scientific and varied from 6.5?×?102 to 6.5?×?103 Kilo Daltons(kDa) by Debye plot. Critical Micelle Concentrations (CMC) of the synthesized polymers was determined using electrical conductivity meter and it ranged from 105 to 125 milligrams per litre (mg L?1). |
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| Keywords: | Amphiphilic polymers poly(ethylene glycols) 1H-NMR 13C-NMR DLS FT-IR spectroscopy TEM CMC |
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