COLLOID AND POLYMER SCIENCE, vol.285, pp.423-430, 2007 (SCI-Expanded)
Article / Article
COLLOID AND POLYMER SCIENCE
Science Citation Index Expanded (SCI-EXPANDED), Scopus
film formation, nanoparticles, poly (N-isopropylacrylamide), microgels, N-ISOPROPYLACRYLAMIDE GELS, VOLUME PHASE-TRANSITION, T LATEX-PARTICLES, PHOTON TRANSMISSION, MOLECULAR-WEIGHT, POLY(N-ISOPROPYLACRYLAMIDE) MICROGELS, ENERGY-TRANSFER, POLYSTYRENE, DISPERSION, FRACTURE
Yıldız Technical University Affiliated:
Reversible film formation process from nano-sized Poly(N-isopropylacrylamide) (PNIPAM) microgel particles were studied during heating-cooling cycles at various rates. Photon transmission technique was used and transmitted photon intensity I (tr) was monitored during heating-cooling cycles. The increase and decrease in I (tr) during heating and cooling was explained with the void closure and void reconstruction processes, and the corresponding activation energies were measured. It was observed that PNIPAM microgels required less energy during reconstruction of voids than their closure.