Effects of phenolic resin on the self-assembly behaviors of polyethylene glycol-b-poly(β-benzyl....

👇Download Article👇 https://www.ijert.org/effects-of-phenolic-resin-on-the-self-assembly-behaviors-of-polyethylene-glycol-b-poly-benzyl-l-aspartate IJERTV9IS020420 Effects of phenolic resin on the self-assembly behaviors of polyethylene glycol-b-poly(β-benzyl L-aspartate) Delphine , M. Murugan , M. Sivanantham Effects of phenolic resin on the self-assembly behaviors of polyethylene glycol-b-poly(-benzyl L-aspartate) (PEG-b-PBLA) were investigated. Successful formation of different PEG-b-PBLA block copolymers was confirmed by nuclear magnetic resonance measurements. Gel permeation chromatography studies showed that PEG-b-PBLA block copolymers have narrow molecular weight distribution. Differential scanning calorimetric studies showed that the melting point of PEG block slightly increased when degree of polymerization of PEG was increased from 125 to 273 with almost fixed PBLA block length. FTIR measurements were used to explore the effect of phenol on the self-assembly behavior of PEG-b-PBLA and it was revealed that the presence of hydrogen bonding interaction between block copolymers and phenolic resin. The influence of phenolic resin on the surface morphologies of block copolymer thin films were explored by scanning electron microscopy.