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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mcewen, I. J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2007Miscibility study of stereoregular poly(methyl methacrylate) blends. Experimental determination of phase diagrams and predictionscitations
- 2006An improved algorithm for the fourier integral of the KWW function and its application to neutron scattering and dielectric datacitations
- 2004Dielectric relaxations in poly(di-n-alkyl itaconate)scitations
- 2004Order in amorphous di-n-alkyl itaconate polymers, copolymers, and blendscitations
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article
Order in amorphous di-n-alkyl itaconate polymers, copolymers, and blends
Abstract
<p>The presence of a main-chain correlation distance (d<sub>II</sub>) in the poly(di-n-alkyl itaconate)s was confirmed with small-angle X-ray scattering/wide-angle X-ray scattering measurements taken over the temperature range of 293-478 K. Data for a series of alkyl acrylate polymers were also obtained for comparison. The intensity of the itaconate d<sub>II</sub> peak was significant and indicated a greater level of nanophase formation than in analogous systems. In the lower members of the series, nanophase formation appeared to be further enhanced in the temperature range above the glass-transition temperature (T<sub>g</sub>). This was ascribed to the rapidly increasing main-chain mobility in this region. Macroscopically phase-separated itaconate blends displayed the individual d<sub>II</sub> nanospacings of each homopolymer component. Copolymers, on the other hand, showed more interesting behavior. Poly (methyl-co-di-n-butyl itaconate) followed an average behavior in which the d<sub>II</sub> spacing and T<sub>g</sub> changed progressively with the comonomer content. In contrast, the side-chain pairing in poly(methyl-co-di-n-octyl itaconate) generated d<sub>II</sub> spacings characteristic of separate methyl and octyl nanodomaina. The observation of the dioctyl nanodomains, along with the dioctyl side-chain lower T<sub>g</sub> relaxation event, confirmed the concept of independent side-chain-domain relaxation in these polymers. The temperature behavior of the polyCmethyl-co-di-n-octyl itaconate) small-angle X-ray scattering profiles and scattering correlation lengths indicated that the two nanodomains were not completely structurally independent. © 2004 Wilty Periodicals, Inc.</p>