Packing effect on latex film formation and dissolution
Küçük Resim Yok
Tarih
2001
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Vsp Bv
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Films of various thicknesses were formed from pyrene (P)-labelled poly(methyl methacrylate) (PMMA) high T-g latex particles, sterically stabilized by poly(iso butylene) (PIB). Annealing of the films was performed above the Tg at elevated temperatures up to 270 degreesC for 30 min intervals. The UV-visible (UVV) technique was used to monitor film formation and dissolution. The absorption of chloroform molecules into the annealed latex film was followed by the diffusion of PMMA chains into the solvent reservoir. The diffusion coefficients of the PMMA chains were measured and found to range from 2.6 x 10(-9) to 9.7 x 10(-13) cm(2) s(-1) for the latex films of various thicknesses. Thicker films dissolved much faster than the thinner films. Monte Carlo simulations were performed for photon transmission through a rectangular lattice, where trap centres are introduced to simulate the effect of voids and cracks on the transparency of the latex film. As the lattice thickness was increased, the number of trap centres decreased.
Açıklama
Anahtar Kelimeler
Packing Coefficient, Film Dissolution, UV-Visible, Monte Carlo Simulation, Photon Transmission, Poly(Methyl Methacrylate), Molecular-Weight, Energy-Transfer, Diffusion, Interdiffusion, Particles, Latices
Kaynak
Designed Monomers And Polymers
WoS Q Değeri
Q3
Scopus Q Değeri
Cilt
4
Sayı
3
