Small angle scattering setting at LURE: Description and results

Tchoubar, D.; Rousseaux, F.; Pons, C. H.; Lemonnier, M.

doi:10.1016/0029-554x(78)90284-7

Cited by 23 publications

(14 citation statements)

References 6 publications

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“…1 same thermal treatment give two spectra, the difference in the measured value of L by this procedure yielding the accuracy of the measurement. For polyethylene (manolene) the accuracy on L by this procedure is about 4 A and 2.5 A respectively with the conventional Rigaku camera and synchrotron radiation experimental setup [17].…”

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Crystallization of polymers. Part I : Polydispersed polymers quenched from the liquid state

et al. 1980

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Résumé. 2014 Nous avons mesuré les longues périodes de plusieurs polymères trempés à partir de l'état fondu. Nous donnons la relation entre la longue période mesurée dans la phase semi-cristalline et la rigidité de la chaîne dans l'état liquide juste avant la cristallisation. On montre que la mesure des longues périodes d'échantillons préala-blement recuits à l'état fondu, à différentes températures, et pendant des temps différents, nous permet de remonter à un temps de relaxation des pelottes dans le fondu.Abstract. 2014 The long spacing L of several crystalline polydispersed polymers quenched from the liquid state at various temperatures has been measured. We correlate the variations of the long period L with the variations of the dimension r0 > of the ideal coils in the melt just before the crystallization. The relationship between L and the rigidity C of the liquid chain is given. The annealing of the melt at different temperatures and for different times, and the subsequent crystallization allow us to measure the relaxation time of the coils in the liquid state.

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“…The The distance between 2 channels in the counter is 0.25 mm. The experimental setup is described in reference [17].…”

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Crystallization of polymers. Part I : Polydispersed polymers quenched from the liquid state

et al. 1980

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“…These measurements can be done using either the whole continuum of X-rays provided by the accelerator (Bordas & Randall, 1978 and references therein) or a monochromatic beam extracted from this continuum (e.g. Barrington-Leigh & Rosenbaum, 1976;Haselgrove, Faruqi, Huxley & Arndt, 1977;Phillips, Wlodawer, Goodfellow, Watenpaugh, Sieker, Jensen & Hodgson, 1977;Tchoubar, Rousseaux, Pons & Lemonnier, 1978;Holmes & Rosenbaum, 1979).…”

Section: Introductionmentioning

confidence: 99%

A double focusing X-ray camera for use with synchrotron radiation

Hendrix¹,

Koch²,

Bordas³

1979

J Appl Cryst

131

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“…So far, most of the cameras used on synchrotronradiation sources were designed for crystallography or fibre diffraction and based on monochromatizing optics selecting a narrow wavelength bandpass (A;t/2 --~ 10 -3) from the continuous spectrum (Barrington Leigh & Rosenbaum, 1976;Hendrix, Koch & Bordas, 1979;Tchoubar, Rousseaux, Pons & Lemonnier, 1978;Rosenbaum & Holmes, 1980). The highest intensities reported so far to be obtained with such cameras were between 101° and 1011 photons s -1 through the sample [c.f.…”

Section: Introductionmentioning

confidence: 99%

Information retrieval from X-ray small-angle scattering with polychromatic (`white') synchrotron radiation

Glatter¹,

Laggner²

1983

J Appl Cryst

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The possibilities of obtaining structural information from X-ray small-angle scattering experiments with 'white' polychromatic synchrotron radiation using line collimation are investigated by numerical simulation. Theoretical scattering curves of geometrical models were smeared with the appropriate wavelength distributions and slit-length functions, afflicted by statistical noise, and then evaluated by identical methods as normally used for experimental data, as described previously [program ITP;Glatter (1977). J. Appl. Cryst. 10, 415-421-1. It is shown that even for a wavelength distribution of 50% half width, the information content is not limited to the parameters derived from the central part of the scattering curves, i.e. the radius of gyration and the zero-angle intensity, but also allows qualitative information on particle shape via the distance distribution function p(r). By a 'hinge-bending model' consisting of two cylinders linked together at different angles it is demonstrated that changes in the radius of gyration amounting to less than 5% can be detected and quantified, and the qualitative changes in particle shape be reproduced.

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Small angle scattering setting at LURE: Description and results

Cited by 23 publications

References 6 publications

Crystallization of polymers. Part I : Polydispersed polymers quenched from the liquid state

Crystallization of polymers. Part I : Polydispersed polymers quenched from the liquid state

A double focusing X-ray camera for use with synchrotron radiation

Information retrieval from X-ray small-angle scattering with polychromatic (`white') synchrotron radiation

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