Water-Soluble Weak-Link Polysulfide Polymers via Interfacial Polycondensation Polymerization: Synthesis, Characterization, Thermal Degradation Studies, and Applications

Sayala, Kapil Dev (2017) Water-Soluble Weak-Link Polysulfide Polymers via Interfacial Polycondensation Polymerization: Synthesis, Characterization, Thermal Degradation Studies, and Applications. Masters thesis, Indian Institute of Science Education and Research Kolkata.

PDF (MS dissertation of Sayala Kapil Dev (12MS072)) 12MS072_Thesis.pdf - Submitted Version Restricted to Repository staff only Download (4MB)

Abstract

In the present work, we synthesized water-soluble poly(ethylene glycol) methyl ether acrylate (PEGA)-containing polysulfide polymers by conventional interfacial polycondensation polymerization. Formation of polysulfide polymers was confirmed using gel permeation chromatography, FT-IR, and NMR spectroscopy. Thermal stability and thermal transition behavior of weak-link polysulfide polymers were investigated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), respectively. Degradation products of the main chain polysulfide polymers were characterized by electron-impact mass spectroscopy (EI-MS). Incorporation of -S- or -S-S- weak-links in the main chain decreased the thermal stability of polysulfide polymers compared to the reversible addition-fragmentation chain transfer (RAFT) made poly[poly(ethylene glycol) methyl ether acrylate] (PPEGA). These polysulfide polymers are soluble not only in most of the common organic solvents but also in water, though they contain highly hydrophobic -Sx- (x = 1 or 2) moieties in the main chain. In addition, the synthesized PEGA-containing disulfide polymer was employed to stabilize gold nanoparticles in an aqueous medium to prevent self-aggregation.

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