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Journal ArticleDOI

A new method of evaluating slit-smeared small-angle X-ray scattering data

01 May 1970-Acta Crystallographica Section A (International Union of Crystallography)-Vol. 26, Iss: 3, pp 367-375
TL;DR: In this paper, a method for evaluating slit-smeared small-angle scattering data is discussed, which is applicable to any primary beam-intensity distribution, and expressions for the computation of the precision of all derived pinhole scattering curve properties are given.
Abstract: A new method for evaluating slit-smeared small-angle scattering data is discussed. It is applicable to any primary beam-intensity distribution. The propagation of measuring errors is examined; expressions for the computation of the precision of all derived pinhole scattering curve properties are given. There is no need to smooth the measured curve before applying the evaluation procedures. The method turns out to be very suitable for practical use.
Citations
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Journal ArticleDOI
01 Oct 1971-Nature
TL;DR: Lipson and Steeple as mentioned in this paper interpreted X-ray powder diffraction patterns and found that powder-diffraction patterns can be represented by a set of 3-dimensional planes.
Abstract: Interpretation of X-ray Powder Diffraction Patterns . By H. Lipson and H. Steeple. Pp. viii + 335 + 3 plates. (Mac-millan: London; St Martins Press: New York, May 1970.) £4.

1,867 citations

Journal ArticleDOI
01 Nov 2001-Polymer
TL;DR: In this article, the intercalated nanocomposites of polypropylene (PP)/clay (PPCNs) successfully using maleic anhydride modified PP (PP-MA) and organophilic clay via melt extrusion process.

492 citations

Journal ArticleDOI
TL;DR: In this paper, a series of regioregular poly(3-hexylthiophene) with well-defined molecular weight (5−19 kg/mol) using DSC, small angle and wide-angle X-ray scattering, and AFM was reported.
Abstract: We report on structural investigations of a series of regioregular poly(3-hexylthiophene) with well-defined molecular weight (5−19 kg/mol) using DSC, small angle and wide-angle X-ray scattering, and AFM. With increasing temperature, we identify three ordered phases, namely 3D crystalline, 2D crystalline with disordered side chains, and a layered phase of smectic symmetry, followed by complete melting. Although all samples crystallize in extended chain conformation, the lower molecular weight material exhibits a lower crystallinity, most likely caused by noncrystallizable end groups. The crystallinity increases strongly with increasing molecular weight, which could be a possible explanation for the known dependence of charge transport properties on molecular weight.

217 citations

Journal ArticleDOI
TL;DR: In this article, two nanostructured thermoset blends of bisphenol A-type epoxy resin (ER) and amphiphilic poly(ethylene oxide)-block-poly(propylene oxide)-polyblock poly(methylene oxide) (PEO−PPO−PEO) triblock copolymers were successfully prepared.
Abstract: Nanostructured thermoset blends of bisphenol A-type epoxy resin (ER) and amphiphilic poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO−PPO−PEO) triblock copolymers were successfully prepared. Two samples of PEO−PPO−PEO triblock copolymer with different ethylene oxide (EO) contents, denoted as EO30 with 30 wt % EO content and EO80 with 80 wt % EO content, were used to form the self-organized thermoset blends of varying compositions using 4,4‘-methylenedianiline (MDA) as curing agent. The phase behavior, crystallization, and morphology were investigated by differential scanning calorimetry (DSC), transmission electron microscopy (TEM), atomic force microscopy (AFM), and small-angle X-ray scattering (SAXS). It was found that macroscopic phase separation took place in the MDA-cured ER/EO30 blends containing 60−80 wt % EO30 triblock copolymer. The MDA-cured ER/EO30 blends with EO30 content up to 50 wt % do not show macroscopic phase separation but exhibit nanostructures on the or...

183 citations

Journal ArticleDOI
TL;DR: In this paper, the structure evolution during isothermal crystallization of isotactic polypropylene and the changes during a subsequent heating to the melt were analyzed by time-and temperature-dependent small-angle sensors.
Abstract: Structure evolution during isothermal crystallization of isotactic polypropylene and the changes during a subsequent heating to the melt were analyzed by time- and temperature-dependent small-angle...

178 citations

References
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Journal ArticleDOI
01 Oct 1971-Nature
TL;DR: Lipson and Steeple as mentioned in this paper interpreted X-ray powder diffraction patterns and found that powder-diffraction patterns can be represented by a set of 3-dimensional planes.
Abstract: Interpretation of X-ray Powder Diffraction Patterns . By H. Lipson and H. Steeple. Pp. viii + 335 + 3 plates. (Mac-millan: London; St Martins Press: New York, May 1970.) £4.

1,867 citations