Intermolecular Interaction in Solutions of Graft Copolymers

Graft copolymers with chemically complementary components as a special class of high-molecular-weight compounds

“…11 b) in a narrow temperature range of 303 ± 308 K, which is virtually independent of N, are indicative of the possible conformational transition in the copolymer macromolecules. Analogous extreme temperature dependences of [Z] were observed also for a series of other graft copolymers containing chemically complementary polymer components, for example, for AC-g-PAA in acetic and formic acids, 85 DAC-g-PAA (DAC is diacetylcellulose) in formic acid 70 and PVA-g-PEO in water. 105 The occurrence of the conformational transition in the macromolecules of PVA-g-PAA(7) (for this sample, the largest decrease in [Z] was observed) was confirmed by the results of investigations of solutions of this copolymer by quasielastic laser light scattering.…”

“…First attempts to reveal the influence of this factor on the thermodynamic properties and behaviour of graft copolymers in solutions have been made in the studies. 68,70 The `pure' influence of the molecular mass of grafted chains is difficult to reveal because of the necessity to prepare and study samples, which should be characterised by the same grafting density and a narrow molecular-mass distribution of the grafts. This problem has attracted increasing interest in recent years because graft copolymers can be synthesised starting from macromonomers with controlled chain length.…”