Premium
Sorption and diffusion of water into melamine–formaldehyde‐incorporated poly(vinyl acetate)–polyester nonwoven fabric composites
Author(s) -
Satheesh Kumar Maddur Nagaraju
Publication year - 2007
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2169
Subject(s) - sorption , permeation , materials science , composite material , vinyl acetate , diffusion , polyester , activation energy , formaldehyde , vinyl ester , fick's laws of diffusion , polymer chemistry , melamine resin , arrhenius equation , chemical engineering , chemistry , polymer , organic chemistry , membrane , copolymer , thermodynamics , adsorption , engineering , biochemistry , physics , coating
A series of composites were fabricated by impregnating a polyester nonwoven fabric with melamine–formol (MF)‐incorporated poly(vinyl acetate) (PVAc) latex. The effect of different weight ratios of MF/PVAc, i.e. 0/100, 5/100, 10, 100, 15/100 and 20/100 (dry, wt/wt), on the water sorption and diffusion into the composites was evaluated. Water sorption studies were carried out at different temperatures, i.e. 30, 50 and 70 °C, based on the immersion weight gain method. From the sorption results, the diffusion ( D ) and permeation ( P ) coefficients of water penetrant were calculated. A significant increase in the diffusion and permeation coefficients was observed with an increase in the temperature of sorption. Drastic reductions in diffusion and permeation coefficients were noticed with increasing MF content in the composites. Attempts were made to estimate the empirical parameters like n , which suggests the mode of transport, and K , a constant which depends on the structural characteristics of the composite in addition to its interaction with water. The temperature dependence of the transport coefficients was used to estimate the activation energy parameters for diffusion ( E D ) and permeation ( E p ) processes from Arrhenius plots. Copyright © 2006 Society of Chemical Industry