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Showing 1 to 12 of 12 for “"Polyrotaxanes"”.
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Novel polymer architectures: polyrotaxanes
… threaded by linear macromolecules and are called polyrotaxanes. Polyrotaxanes are considered to be physical analogs of block or graft copolymers or molecular interpenetrating systems. The design and synthesis of the macrocyclic component, "blocking groups" to constrain the macrocycles and the …
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Supramolecular architectures: macrocycles, catenanes and polyrotaxanes
Polyrotaxanes are molecular composites consisting of three components: linear polymers, bulky stoppers at the ends of polymer chains and macrocycles threaded by the polymers. A series of tetraarylmethyl derivatives as blocking groups were synthesized. Using tris(p-ten-butylphenyl)( …
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Synthesis and characterization of novel molecular architectures: polyrotaxanes and catenanes
Polyrotaxanes are novel polymer architectures consisting of theo components. One component is the macrocycel consisting of 24-60 atoms; it is threaded by he second component, i.e., the linear backbone polymer.
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New polymer architectures: synthesis and characterization of polyurethane-crown ether based polyrotaxanes
… architectures. Unlike conventional polymers, polyrotaxanes are molecular composites comprised of macrocycles threaded by linear polymer backbones with no covalent bonds between the two components. This novel class of materials displays unusual chemical and physical properties due to their …
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Synthesis and characterization of liquid crystalline polyrotaxanes based on poly(azomethine)s
Polyrotaxanes are new polymers. Macrocyclic molecules, such as crown ethers, are threaded by linear or branched polymer chains. There is no covalent bond between the crown ethers and the polymer backbone. After the crown ethers are threaded onto the polymer backbone, both ends of the polymer can be …
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Molecular necklaces: polyester rotaxanes
Polyrotaxanes consisting of 30-60 membered aliphatic crown ether macrocycles whose cavities are pierced by polysebacate chains were synthesized by several polymerization approaches including transesterification polymerization, the acid chloride method, and interfacial polymerization. The …
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Linear, Branched and Crosslinked Polymers, Polyesters, Polyurethanes and Polymethacrylates Derived From Rotaxane Formation: Syntheses and Properties
As new family of composite materials, polyrotaxanes, polymers containing rotaxane units, have interested scientists world wide in last few decades because of their new properties. Crown ethers have been widely used as the cyclic component in various polyrotaxanes. However, due to significant loss …
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Part I: Synthesis and Ring Opening Polymerization of Macrocyclic Monomers for Production of Engineering Thermoplastics
… average ring size of cyclic mixtures. Part II: Polyrotaxanes are novel polymeric materials comprised of linear polymer molecules and threaded macrocycles with no covalent bond between the two components. With potential movements of the cyclic component and judicious combinations of the two …
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Molecular composites of a conducting polymer: syntheses and characterization of poly(1,4-phenylenevinylene)-crown ether rotaxanes
Polyrotaxanes, a new class of polymer architectures, so called molecular composites, are comprised of macrocycles threaded by linear backbones with no covalent bond between them. By using poly(1,4-phenylenevinylene) (PPV), one of the most promising conductive polymers, as the linear backbone and …
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Thermodynamically Driven (Reversible) End-Capping of Pseudorotaxanes to Produce Rotaxanes
… crown ethers for polymerization to make polyrotaxanes and synthesis of self-assembled polymers using this synthetic method.
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Self-Assembly: Synthesis and Complexation of Crown Ethers and Cryptands with R2-NH2 Ions
… for the formation of larger complexes, i.e. polyrotaxanes. However, it is suggested that the DB24C8 moiety be used in components of supramolecular assemblies. The functionalization of poly(propylene imine) dendrimers with two different crown ethers as peripheral moieties was attempted. The …
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Synthesis and performance of novel supramolecular tools for single-particle cryogenic electron microscopy and drug and gene delivery
… gold standard resolution of 8.1 Å. A library of polyrotaxanes based on PEG, ?-CD and various endcaps and rotaxanation methods was synthesized. Several of these compounds were further modified with NTA moieties to impart affinity interactions on the tubular polyrotaxane templates which might be …