Compression for data archiving and backup revisited
Corneliu Constantinescu
SPIE Optical Engineering + Applications 2009
The influence of morphological transitions on the hydrogen‐bonding behavior of polyurethanes is investigated by simultaneous measurements of Fourier‐transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The materials examined are a noncrystalline polyurethane hard segment, a crystallizable polyurethane hard segment, and a segmented polyurethane block copolymer containing crystallizable hard segments. Integrated absorbance data show that the hydrogen‐bonding behavior is insensitive to crystalline transitions within the hard segment microdomains, but that it does reflect morphological transitions in the block copolymer that are associated with intersegmental mixing. In addition, the spectral data show conclusive evidence for reversal of the urethane reaction at high temperatures. Copyright © 1986 John Wiley & Sons, Inc.
Corneliu Constantinescu
SPIE Optical Engineering + Applications 2009
P. Martensson, R.M. Feenstra
Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Sang-Min Park, Mark P. Stoykovich, et al.
Advanced Materials
R.J. Gambino, N.R. Stemple, et al.
Journal of Physics and Chemistry of Solids