Complex Formation between Cyclic Urethane and Zinc Chloride: Its Effect on Polyrotaxane Synthesis

Lipatova, T.E.; Kosyanchuk, L. F.; Шилов, В. В.

doi:10.1080/00222338508056608

Cited by 7 publications

(4 citation statements)

References 10 publications

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“…Although the reactions of the complexes of amines with cyclodextrin (CD) and those of carboxylic acids, and formation of polyrotaxanes using cyclic urethanes during polymerization were reported, − CDs were found to thread onto a polymer chain to give polyrotaxanes for the first time in 1990 …”

Section: Introductionmentioning

confidence: 99%

“…However, molecular recognition has led to high yields of rotaxanes and catenanes without high dilution, and since then, various interlocked molecules have been prepared. Although the reactions of the complexes of amines with cyclodextrin (CD) and those of carboxylic acids, 10 and formation of polyrotaxanes using cyclic urethanes during polymerization were reported, [11][12][13] CDs were found to thread onto a polymer chain to give polyrotaxanes for the first time in 1990. 14 To date, various polyrotaxanes have been investigated as new building blocks to construct nanostructures as well as to realize novel functions.…”

Section: Introductionmentioning

confidence: 99%

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Polymeric Rotaxanes

et al. 2009

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2.2. Main Chain Polyrotaxane with Crown Ethers (CEs) 5985 2.3. Main Chain Polyrotaxanes with Other Wheel Compounds 5987 2.3.1. Cucurbit[n]uril-Based System 5987 2.3.2. Cyclobisparquat/Cyclophane-Based Systems 5988 2.3.3. Metal Coordination Systems 5989 2.3.4. Calixarene-Based System 5990 2.4. Applications of Main Chain Polyrotaxanes 5990 2.4.1. Biodegradable Polyrotaxanes and Hydrogels 5990 2.4.2. Molecular Tubes Prepared from Polyrotaxanes 5993 2.4.3. Supramolecular Light-Harvesting Antenna 5993 2.4.4. Insulated Polymers 5993 2.4.5. Stimuli-Responsive Molecular Shuttles Using Polyrotaxanes or Polypseudorotaxanes 5993 3. Side Chain Polyrotaxanes and Polypseudorotaxanes 5995 3.1. Background of Side Chain Polyrotaxanes and Polypseudorotaxanes 5995 3.2. Categories of Side Chain Polyrotaxanes and Polypseudorotaxanes 5997 3.3. Rotor/Polyaxis Systems (See Scheme a and b) 5997 3.3.1. CD-Based Systems 5997 3.3.2. Crown Ether-Based Systems 6003 3.3.3. Cucurbituril-Based Systems 6003 3.4. Polyrotor/Axis Systems (See Scheme c and d) 6004 3.4.1. CD-Based Systems 6004 3.4.2. Crown Ether-and Cyclophane-Based Systems

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polymeric Rotaxanes

et al. 2009

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“…Morphologies and chain mobilities, and therefore mechanical and transport properties, can be significantly altered by threading. While some studies of polyrotaxane morphologies have appeared, − very little is known about mechanical or transport properties.…”

Section: Introductionmentioning

confidence: 99%

Solid-State NMR Investigations of Poly[(acrylonitrile)-rotaxa-(60-crown-20)]

et al. 1999

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Solid-state NMR has been used to investigate the structure, dynamics, and morphology of the polyrotaxane prepared by polymerizing acrylonitrile in the presence of 60-crown-20. For solid poly-[(acrylonitrile)n-rotaxa-(60-crown-20)x] with x/n ) 0.01, the 60-crown-20 was found to be phase-separated, amorphous, and highly mobile at room temperature. 2D WISE NMR revealed the presence of less mobile crown segments that were attributed to those in contact with the rigid PAN phase at the interfacial regions. Compared to unthreaded PAN, the Tg of the host backbone was slightly depressed (90°C vs 110°C ), as measured by solid-state 1 H NMR. These PAN Tg values were undetectable with DSC. Dipolar magnetization transfer (i.e., spin diffusion) experiments on the polyrotaxane revealed typical smallest diameters of 6-8 nm for the 60-crown-20 domains and NMR long periods of 20-26 nm. The long periods were compared with electron density correlation lengths computed from SAXS data. Upon heating the polyrotaxane to 80°C, the primary change in the domain structure was a reduction in the size of the interface. A physical blend of PAN and 60c20 was also found to be phase separated, with a sharper interface than the polyrotaxane.

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“…Additionally, many reports were focused on polyrotaxanes formed by threading a polymer chain or a long molecule through CD rings. [16][17][18] Conventional emulsion polymerization required a lot of emulsifiers. Sometimes, the emulsifiers polluted the environment and damaged properties of polymer, so great efforts were carried out to eliminate or reduce emulsifiers from the polymer.…”

Section: Studies On the Preparation Of Stable Pst Latex In The Presenmentioning

confidence: 99%

Studies on the Preparation of Stable PSt Latex in the Presence of Cyclodextrins and a Small Amount of Surfactant

Huang

Zhang

Zhao

et al. 2012

Journal of Dispersion Science and Technology

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Polystyrene (PSt) latex was successfully prepared via emulsion polymerization using a novel sequential feeding way. In our method, polymerization was conducted in the presence of betacyclodextrin (b-CD) and a small amount of surfactant. The concentrations of the surfactant, b-CD and initiator, and the including time of St with b-CD acted as crucial roles in the preparing process. The results showed that the coagulum decreased with increasing of the concentration of the surfactant. The coagulum also decreased greatly when the amount of b-CD was lower than 1%. Furthermore, the coagulum decreased at the early stage and then increased with the increase of the concentration of initiator. Also, the monomer conversion increased by increasing the amount of surfactant and initiator. The morphology of the obtained particle was examined with a transmission electron microscope (TEM). The particle size increased constantly with the increase of the amount of b-CD. Otherwise, it decreased with the increase of the concentration of surfactant and initiator. Comparing with the semicontinuous condition, the sequential feeding way improved the monomer conversion, polymerization rate and the monodispersity.

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Complex Formation between Cyclic Urethane and Zinc Chloride: Its Effect on Polyrotaxane Synthesis

Cited by 7 publications

References 10 publications

Polymeric Rotaxanes

Polymeric Rotaxanes

Solid-State NMR Investigations of Poly[(acrylonitrile)-rotaxa-(60-crown-20)]

Studies on the Preparation of Stable PSt Latex in the Presence of Cyclodextrins and a Small Amount of Surfactant

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