Studies of relationship between polymer structure and hydration environment in amphiphilic polytartaramides

摘要: The relationships between the chemical structures and hydration environment of polymers can provide significant insight into water-amphiphilic polymer interactions. Here, hydrophobicity amphiphilic block copolymers poly(ethylene tartaramide-b-alkyl isocyanate) is gradually tuned by using a series pendant alkyl (isopropyl, n-butyl, cyclopentyl, cyclohexyl) groups. Dynamics probed low-field NMR relaxometry exhibits heterogeneous water molecules, corresponding to tightly bound with slow re-orientational mobility loosely fast mobility. Progressively larger amounts are present in copolymers, ongoing from isopropyl, finally cyclohexyl group. Water copolymer bearing group has significantly high partial specific heat capacity. Therefore, hydrophobic interaction enhanced when increased, resulting considerable decreased water. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Phys. 2016.