Amorphous polyurethane—polyether blends

Miscibility and Specific Interactions in Blends of Poly(4-vinylphenol) and Poly(2-ethoxyethyl methacrylate)

“…Among miscible polymer blends, hydrogen-bonded systems have played a prominent role. There exists a great structural variety of miscible hydrogen-bonding polymer pairs. − In particular, a considerable amount of literature concerns the miscibility of poly(4-vinylphenol) (PVPh) with other polymers. − Poly(4-vinylphenol) is a proton donor that has an easily accessible hydroxyl group in the fourth position of the aromatic ring (Figure ). It undergoes strong hydrogen-bonding interactions with proton-acceptor polymers such as poly(ethylene oxide), poly(methyl methacrylate), and poly(vinyl methyl ketone) .…”

Nondestructive Molecular Characterization of Polycarbonate–Polyvinylamine Composites after Thermally Induced Aminolysis

“…The ν(C=O) mode of Urethane is split into two bands at 1705 and 1712 cm −1 . These two bands are characteristic for the nonhydrogen bonded and hydrogen bonded carbonyl groups in urethanes . The broad band around 1513 cm −1 is assigned to aromatic stretching modes.…”

“…Cyclic forms of allophanate and urea are expected due to the steric requirements and a possible 6‐membered ring formation with neighboring amino groups. PC backbone scission due to aminolysis is also accompanied by an erosion of the PC surface so that morphology and final adhesion to the amine are altered …”

“…Vibrational spectroscopy, such as IR spectroscopy, has the potential for identification and accurate determination of the molecular structure in a nondestructive way. However, a complex structure involving possible H‐bonding interactions and morphological inhomogeneities within the interphase makes the interpretation of IR spectra difficult. The molecular characterization of the PC–PVAm interphase with only band assignment based on IR library search is a challenge since most data do not originate from the specific reaction products.…”

Novel blends of poly[bis(glycine ethyl ester) phosphazene] and polyesters or polyanhydrides: compatibility and degradation characteristicsin vitro

“…It is well known that IR bands of hydrogen‐bonded carbonyl groups exhibit a redshift the extent of which depends on the chemical structure of the polymers 15. 16 The structure NP(NH) in PGP is similar to the C(O)NH group in polyurethane, which was confirmed to strongly interact with a polyether through hydrogen‐bonding;17 the secondary amino group NP(NH) is assumed to act as a proton donor to carbonyl groups. Therefore, the band at 1690 cm −1 may be assigned to the hydrogen‐bonded carbonyl groups.…”