Structural and morphological features of the syndiotactic polystyrene/ethylbenzene complex

Moyses, Stephan; Sonntag, Philippe; Spells, Stephen J.; Laveix, Olivier

doi:10.1016/s0032-3861(97)10323-8

Cited by 25 publications

(28 citation statements)

References 17 publications

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“…In some experimental studies, [5,12] the interpretation of the cform structure was probably based on the same indexing as that of Wang et al In our simulation, however, the spacing values are calculated to be d 010 = 8.44 and d 200 = 9.65 A. Therefore, the assignment of the diffraction rings by Wang et al might be corrected.…”

Section: Resultssupporting

confidence: 50%

“…[1,6,8,9] The large cavities are thought to disappear since the density increases to approximately 1.07 g/cm 3 . [9] Although these phase transition behaviors have been experimentally investigated since the 1990s, [1,[8][9][10][11][12] the crystal structure of the c form, i. e., space group, crystal cell dimensions, and partial coordinates of atoms in the asymmetric unit, have not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

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Thermally Induced Phase Transition of Crystalline Syndiotactic Polystyrene Studied by Molecular Dynamics Simulation

Tamai¹,

Fukuda²

2002

Macromol. Rapid Commun.

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Section: Resultssupporting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Thermally Induced Phase Transition of Crystalline Syndiotactic Polystyrene Studied by Molecular Dynamics Simulation

Tamai¹,

Fukuda²

2002

Macromol. Rapid Commun.

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“…The interactions of various chemical systems and polymers have become a great interest for the decades and numerous studies have been undertaken to investigate the interaction between the host and guest molecules. The novel properties of syndiotactic polystyrene (sPS) such as high melting temperature (270 °C),1 adjustable δ forms, and TTGG helical conformation are obtained using different organic solvents 2–5. Further, it has high‐level crystallinity and tacticity,2, 6 which makes it a potential material in the applications of electronics and engineering industries.…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of the δ‐form and mesophase of syndiotactic polystyrene membranes prepared from different organic solvents

Sivakumar

Mahesh

Yamamoto

et al. 2005

J Polym Sci B Polym Phys

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Syndiotactic polystyrene (sPS) membranes were prepared with different organic solvent systems and compared to get the information about the -form complexing behavior of sPS. Further, the guest molecules included in the clathrate form of sPS are removed by stepwise extraction method. The conformational changes during the TTGG helical formation of sPS/organic solvent systems have been identified by FTIR spectroscopy, and it was concluded that the TTGG helices were constructed in regular sequences, which depends on the nature of the respective solvents. The TTGG content in the mesophase is found to be increased by removing the guest molecules. The structural changes of sPS/organic solvent systems have been characterized by WAXD analysis. Moreover, the different clathrate structures were found and showed the different crystalline reflections in the WAXD profiles, which are significantly changed with the kind of guest solvent included in sPS. The content of solvents in the clathrated sPS and the desorption temperatures were determined by thermal analysis. The resulted mesophase of sPS membrane contains the nanoporous molecular cavities that depend on the size of the guest molecule. V V C 2005 Wiley Periodicals, Inc.

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“…There is experimental evidence12, 13 pointing to the formation of polymer–solvent complexes that stabilize the ordered TTGG conformation of sPS in a gel and thin film. Syndiotactic polystyrene forms fibrillar clathrates owing to a TTGG helical strip (δ form) that is stabilized by different aromatic solvents such as benzene,14 toluene,15 ethylbenzene,16 o ‐xylene,17 and decalin 18. The formation and thermal stability of the TTGG helical conformation in sPS clathrate depends heavily on the type of organic solvent.…”

Section: Introductionmentioning

confidence: 99%

Studies on the δ‐form complex in the syndiotactic polystyrene–organic molecule system. II. Structural investigation of the δ‐form with p‐ and m‐xylene isomers

Sivakumar

Yamamoto

Amutharani

et al. 2003

J of Applied Polymer Sci

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Syndiotactic polystyrene (sPS) membranes containing different mole fractions of p-xylene were prepared by a solution-casting procedure. Complex formation between sPS and xylene was studied by thermogravimetric analysis and Fourier transform infrared spectroscopy. The stability and desorption behavior of the sPS-guest solvent and phase transitions were studied by differential scanning calorimetry. The formation of the ␦-form complex in the presence of different mole fractions of xylene isomers was analyzed and confirmed. The mole fraction of p-xylene in the dried membrane was found to be higher than that of the corresponding mole fraction in the isomer solvent solution used for casting. This was attributed to the preferential complexing ability of p-xylene with sPS.

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Structural and morphological features of the syndiotactic polystyrene/ethylbenzene complex

Cited by 25 publications

References 17 publications

Thermally Induced Phase Transition of Crystalline Syndiotactic Polystyrene Studied by Molecular Dynamics Simulation

Thermally Induced Phase Transition of Crystalline Syndiotactic Polystyrene Studied by Molecular Dynamics Simulation

Structure and properties of the δ‐form and mesophase of syndiotactic polystyrene membranes prepared from different organic solvents

Studies on the δ‐form complex in the syndiotactic polystyrene–organic molecule system. II. Structural investigation of the δ‐form with p‐ and m‐xylene isomers

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