Polymer‐Solvent Molecular Compounds: A Brief Presentation

Guenet, Jean‐Michel

doi:10.1002/masy.200751220

Cited by 6 publications

(9 citation statements)

References 20 publications

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“…Consequently, the granular products from the PLLA/DE mixture ought to be crystallosolvates in which DE is absorbed by the solidified PLLA. Such crystallosolvate formation of polyesters has never been reported before, while various polymer crystallosolvates involving, for example, polyimides8 and polysaccharides9 have been well known 10. In the present crystallosolvate, PLLA strongly interacts with DE to afford an interesting example.…”

Section: Resultsmentioning

confidence: 55%

Formation of Crystallosolvates from Mixtures of Poly(L‐lactide) and Diphenyl Ether

Nakajima

Wataoka

Ohara

et al. 2009

Macro Chemistry & Physics

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Poly(L‐lactide) (PLLA) was mixed homogeneously with diphenyl ether (DE) at high temperature in a range of PLLA/DE compositions from 100/0 to 100/75 in wt.‐%. Cooling of the mixtures yielded white solid products without migration of the liquid DE. Their melting temperature was lowered from 173 to 123 °C as the DE content increased. At an optimum PLLA/DE composition of 100/60, a unique crystallosolvate consisting of large spherulite of PLLA, as detected using polarized optical microscopy, was exclusively generated in powder form. Wide and small angle X‐ray scattering revealed that the PLLA chains form a lamellar structure with a highly ordered crystalline state (α‐form) and that the lamellar spacing is extraordinarily thick, reaching 34 nm. It was therefore suggested that DE partitions into the amorphous layers sandwiched between the crystalline layers and that the specific solvation interaction between DE and PLLA may stabilize the crystallosolvates.

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Section: Resultsmentioning

confidence: 55%

Formation of Crystallosolvates from Mixtures of Poly(L‐lactide) and Diphenyl Ether

Nakajima

Wataoka

Ohara

et al. 2009

Macro Chemistry & Physics

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“…Fig. (a)] is characteristic of an incongruently‐melting compound, whereby the compound C transforms into another phase (in this case a liquid plus, most likely, semicrystalline polymer (L + S 2 )) at concentrations below x u * prior to its complete melting . Such behavior has been observed for syndiotactic polystyrene (sPS) gels in trans ‐decalin, for which a compound with stoichiometry 1:1 has been demonstrated .…”

Section: Resultsmentioning

confidence: 92%

“…This confused situation motivated our present study and we report below on the formation and selected properties of solution‐crystallized polymer‐solvent compounds, comprising PFO and particular organic solvents. Such compounds form by stoichiometric co‐crystallization of polymer chains and small‐molecular solvents, resulting in a composite molecular structure featuring weak, typically van der Waals, bonding between the two components . Depending on the details of their microstructure as well as the scientific context of the study, these compounds have also been termed crystallosolvates or polymer‐solvent intercalates, clathrates, and complexes .…”

Section: Introductionmentioning

confidence: 99%

“…Such compounds form by stoichiometric co‐crystallization of polymer chains and small‐molecular solvents, resulting in a composite molecular structure featuring weak, typically van der Waals, bonding between the two components . Depending on the details of their microstructure as well as the scientific context of the study, these compounds have also been termed crystallosolvates or polymer‐solvent intercalates, clathrates, and complexes . Cellulose represents one well‐known example of a natural polymer that forms such compounds; synthetic polymer examples include polyoxyethylene, poly(methyl methacrylate), poly(vinylidene fluoride), as well as isotactic and syndiotactic polystyrene .…”

Section: Introductionmentioning

confidence: 99%

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Solution‐crystallization and related phenomena in 9,9‐dialkyl‐fluorene polymers. I. Crystalline polymer‐solvent compound formation for poly(9,9‐dioctylfluorene)

Perevedentsev

Stavrinou

Bradley

et al. 2015

J. Polym. Sci. Part B: Polym. Phys.

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Polymer-solvent compound formation, occurring via co-crystallization of polymer chains and selected small-molecular species, is demonstrated for the conjugated polymer poly(9,9-dioctylfluorene) (PFO) and a range of organic solvents. The resulting crystallization and gelation processes in PFO solutions are studied by differential scanning calorimetry, with X-ray diffraction providing additional information on the resulting microstructure. It is shown that PFO-solvent compounds comprise an ultra-regular molecular-level arrangement of the semiconducting polymer host and small-molecular solvent guest. Crystals form following adoption of the planar-zigzag β-phase chain conformation, which, due to its geometry, creates periodic cavities that accommodate the ordered inclusion of solvent molecules of matching volume. The findings are formalized in terms of nonequilibrium temperature–composition phase diagrams. The potential applications of these compounds and the new functionalities that they might enable are also discussed. © 2015 The Authors. Journal of Polymer Science Part B: Polymer Physics published by Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015, 53, 1481–1491

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“…[1,2] Complexation of sPS in crystalline states has become of interest in recent years because of its diversity. Contrary to other polymers that form co-crystalline structures, sPS can accept a wide range of chemical compounds with different size, shape and property in its crystalline states.…”

Section: Introductionmentioning

confidence: 99%

Crystalline Complex of Syndiotactic Polystyrene with Poly(ethylene Glycol) Dimethyl Ethers

Kaneko

Sasaki

2011

Macromol. Rapid Commun.

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It has been clarified that syndiotactic polystyrene (sPS) forms co-crystalline structures with polyethylene glycol dimethyl ethers (PEGDMEs) with molecular weights ranging from 178 to 1,000 g·mol(-1) through a guest exchange procedure assisted by a plasticizing agent. The PEGDME molecules are incorporated into the spaces between sPS polymer sheets consisting of (T(2)G(2))(2) helices. The results of X-ray diffraction and gravimetric measurements suggest that one or less molecules are included per unit cell for PEGDME with average molecular weight of 1,000 g·mol(-1), which indicates the possibility that longer polymeric molecules can be introduced into sPS lattices with multiple site occupation.

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Polymer‐Solvent Molecular Compounds: A Brief Presentation

Cited by 6 publications

References 20 publications

Formation of Crystallosolvates from Mixtures of Poly(L‐lactide) and Diphenyl Ether

Formation of Crystallosolvates from Mixtures of Poly(L‐lactide) and Diphenyl Ether

Solution‐crystallization and related phenomena in 9,9‐dialkyl‐fluorene polymers. I. Crystalline polymer‐solvent compound formation for poly(9,9‐dioctylfluorene)

Crystalline Complex of Syndiotactic Polystyrene with Poly(ethylene Glycol) Dimethyl Ethers

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