LOCAL DYNAMICS AND MOLECULAR ORIGIN OF POLYMER NETWORK-WATER INTERACTIONS AS STUDIED BY BROADBAND DIELECTRIC RELAXATION SPECTROSCOPY, FTIR AND MOLECULAR SIMULATIONS

摘要

The intensity and the dielectric relaxation strength of the local processes (p and y) increase with moisture uptake. The molecular origin of the p process is associated with the hydroxyl groups while the y process involves the ether groups of the glycidyl moiety. Deconvolution of the NIR spectra yielded three spectroscopically distinguishable forms of water, with zero, one and two hydrogen atoms participating in hydrogen bonding. The relative ratio of each form of water to the total absorbed water was calculated from the NIR data and molecular simulations. The observed agreement between the two techniques was excellent.