Phase separation in polystyrene-poly(vinylmethylether) blends: a a fluorescence emission analysis

Halary, Jean Louis; Ubrich, J. M.; Nunzi, Jean‐Michel; Monnerie, L.; Stein, Richard S.

doi:10.1016/0032-3861(84)90079-x

Cited by 84 publications

(63 citation statements)

References 17 publications

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“…Thus the ester group, or perhaps the PEO chain, causes some quenching of excited naphthalene. In retrospect, we recall the finding of Monnerie and co-workers that the ether functionality quenches anthracene fluorescence, but we did not anticipate this kind of effect here, where the solvents are also ethers (16).…”

Section: Diester Jluorescetzcesupporting

confidence: 44%

Photophysical behavior of oligoethylene glycols labeled with naphthalene carboxylate and phosphate esters

Lee¹,

Winnik²

1994

Can. J. Chem.

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SAM LEE and MITCHELL A. WINNIK. Can. J. Chem. 72, 1587 (1994).The fluorescence spectra of tri-and tetraethylene glycol esterified with 2-(1-naphthy1)ethyl ethyl phosphate and 241-naphthy1)ethyl 2-(ethoxy)ethyl phosphate were studied in dilute solutions of tetrahydrofuran (THF) and diethyl ether. They were con~pared with the fluorescence from tri-and tetraethylene glycol esterified with I-naphthyl acetic acid. These compounds form intramolecular excimers. The extent of excimer formation is not extensive, but the relative amount of excimer emission from these compounds varies with the choice of solvent. Three synthetic intermediates to the phosphates, the 2-(1-naphthy1)ethyl ~,~-diiso~ro~~l~hos~horamidites of tri-and tetraethylene glycol and of 2-ethoxyethanol, were also examined. These compounds fonn intramolecular exciplexes. In THF, the relative amount of exciplex emission from the phosphoramidites follows the same trend as the carboxylate esters. In diethyl ether, the trend is different. Rates of fluorescence decay have been measured for these compounds. The results are discussed in terms of how inforn~ation about the conformational and dynamic behavior of these molecules in solution can be obtained, and how the solvent can influence the relative amounts of excimer or exciplex fluorescence.

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Section: Diester Jluorescetzcesupporting

confidence: 44%

Photophysical behavior of oligoethylene glycols labeled with naphthalene carboxylate and phosphate esters

Lee¹,

Winnik²

1994

Can. J. Chem.

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“…The fluorescence quenching phenomenon was initially used by Halary et al 16 to study the phase separation in polystyrene/poly(vinylmethylether) (PS/ PVME) blends. PS was first labeled with anthracene in the middle chain.…”

Section: Introductionmentioning

confidence: 99%

Miscibility characterization of SMA/SAN and SMA/PMMA blends by differential scanning calorimetry and fluorescence techniques

Fang

Mighri

Ajji

2007

J of Applied Polymer Sci

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In this study, styrene‐maleic anhydride (SMA) copolymer was modified by monoesterification method with 9‐(hydroxymethyl)anthracene fluorophore to prepare a fluorescent anthracene labeled SMA (SMA‐An) material. The latter was then characterized by attenuated total reflection (ATR) and thermogravimetric analysis (TGA) techniques. In the second step of this work, SMA‐An was added to SMA/[Styrene‐Acrylonitrile Copolymer (SAN)] and SMA/[Poly(methyl methacrylate) (PMMA)] blends to investigate the miscibility of these blends at the molecular level. The miscibility of SMA/PMMA blends was characterized using fluorescence quenching of anthracene by the succinic anhydride and succinic acid functions on SMA macromolecule itself. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007

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“…Following Helfand [46,47] we note that equation (34) [46]. Since equations (20), (37) imply that for 01 -+ 1 we have D ,zt d, equation (38) again shows the logarithmic divergence of the thickness of the wet layer when a second-order wetting transition is approached As a result, we have found that the qualitative features of the description of wetting at ø 00 = 0 in the framework of the long wave length approximation and in the framework of the theory of Helfand et al [46,47,49] are the same, although prefactors (such as the length L in Eqs.…”

mentioning

confidence: 99%

“…For a treatment of the limit tP 00 --+ 0 we apply the approach of Helfand and co-workers [46,47] [49] shows that the same equations result also for a problem with a local free surface perturbation; in the limit N ..... oo the free surface acts as a boundary condition for equation (34) only [51]. Following Helfand [46,47] we note that equation (34) [46].…”

mentioning

confidence: 99%

Model calculations for wetting transitions in polymer mixtures

1985

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Phase separation in polystyrene-poly(vinylmethylether) blends: a a fluorescence emission analysis

Cited by 84 publications

References 17 publications

Photophysical behavior of oligoethylene glycols labeled with naphthalene carboxylate and phosphate esters

Photophysical behavior of oligoethylene glycols labeled with naphthalene carboxylate and phosphate esters

Miscibility characterization of SMA/SAN and SMA/PMMA blends by differential scanning calorimetry and fluorescence techniques

Model calculations for wetting transitions in polymer mixtures

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