Static scattering from cyclic copolymers in solution
نویسندگان
چکیده
The static scattering properties of cyclic diblock copolymers in solution are studied. The case of a symmetric diblock in a solvent satisfying the optical theta condition is considered in details. The results show substantial differences with respect to linear diblock copolymers. The additional entropic interaction in cyclic chains induces a decrease of the scattering intensity and a shift of the location of its maximum to a higher q value. This results in a substantial compatibility enhancement as compared to linear copolymers.
منابع مشابه
Polymer blends, copolymers and networks. Scattering properties and phase behavior
The phase behavior and scattering properties of polymer blends, copolymers and networks in solution and in bulk are examined. The theoretical framework used here is based upon the extension of the random phase approximation to polymers proposed by de Gennes and its application to chains with various architectures. The case of blends containing stiff chains is considered and the effect of nemati...
متن کاملAssociation behavior of biotinylated and non-biotinylated poly(ethylene oxide)-b-poly(2-(diethylamino)ethyl methacrylate).
Biotinylated and non-biotinylated copolymers of poly(ethylene oxide) (PEO) and poly(2-(diethylamino)ethyl methacrylate) (PDEAEMA) were synthesized by the atom transfer radical polymerization technique. The chemical compositions of the copolymers as determined by NMR are represented by PEO(113)PDEAEMA(70) and biotin-PEO(104)PDEAEMA(93), respectively. The aggregation behavior of these polymers in...
متن کاملSelective betainization of PS-P4VP and solution properties.
The ability to control the structure and function of supramolecular self-assemblies gives rise to many patterning possibilities. Making use of the interactions between the copolymers and solvent provides a neat way of controlling the structures. The pyridine residues of each of the diblock copolymer polystyrene-b-poly(4-vinylpyridine) (PS-P4VP) was selectively betainized using 1,3-propane sulto...
متن کاملStatic partial scattering functions for linear and ring random copolymers
The static partial scattering functions for linear and ring random copolymers of type A–B are investigated. In the case of random distribution of the different kinds of monomers, analytic forms can be derived. Monte Carlo simulations are used to make evaluations on biased distributions of the different kinds of monomers. Results clearly show that the number, fraction and distribution of monomer...
متن کاملCharacterization of the soluble nanoparticles formed through Coulombic interaction of bovine serum albumin with anionic graft copolymers at low pH.
A static light scattering (SLS) study of bovine serum albumin (BSA) mixtures with two anionic graft copolymers of poly(sodium acrylate-co-sodium 2-acrylamido-2-methyl-1-propanesulphonate)-graft-poly(N,N-dimethylacrylamide), with a high composition in poly(N,N-dimethylacrylamide) (PDMAM) side chains, revealed the formation of oppositely charged complexes, at pH lower than 4.9, the isoelectric po...
متن کامل