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On the role of block copolymer additives for calcium carbonate crystallization : Small angle neutron scattering investigation by applying contrast variation

On the role of block copolymer additives for calcium carbonate crystallization : Small angle neutron scattering investigation by applying contrast variation

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ENDO, Hitoshi, Dietmar SCHWAHN, Helmut CÖLFEN, 2004. On the role of block copolymer additives for calcium carbonate crystallization : Small angle neutron scattering investigation by applying contrast variation. In: The Journal of Chemical Physics. 120(19), pp. 9410-9423. ISSN 0021-9606. eISSN 1089-7690. Available under: doi: 10.1063/1.1691736

@article{Endo2004-05-15block-40454, title={On the role of block copolymer additives for calcium carbonate crystallization : Small angle neutron scattering investigation by applying contrast variation}, year={2004}, doi={10.1063/1.1691736}, number={19}, volume={120}, issn={0021-9606}, journal={The Journal of Chemical Physics}, pages={9410--9423}, author={Endo, Hitoshi and Schwahn, Dietmar and Cölfen, Helmut} }

Cölfen, Helmut Endo, Hitoshi 2017-10-30T12:58:59Z 2017-10-30T12:58:59Z 2004-05-15 Endo, Hitoshi Schwahn, Dietmar eng The role of the double-hydrophilic block copolymer poly(ethylen glycol)-block-poly(methacrylic acid) (PEG-b-PMAA) on the morphogenesis of calcium carbonate (CaCO<sub>3</sub>) was studied by applying the contrast variation small angle neutron scattering technique. The morphology and size of CaCO<sub>3</sub> crystals is strongly affected by the addition of PEG-b-PMAA. In order to determine the partial scattering functions of the polymer and CaCO<sub>3</sub> mineral, we developed both an experimental and theoretical approach with a sophisticated method of their determination from the scattering intensity. Partial scattering functions give detailed information for each component. In particular, the partial scattering function of the polymer, Spp, shows a monotonic slope with Q<sup>-2 to -3</sup> where the scattering vector Q is low (Q < 0.01 Angstrom<sup>-1</sup>), which is a clear evidence that the polymer within the CaCO<sub>3</sub> mineral has a mass fractal dimension. The other partial scattering functions reflected the geometry of the CaCO<sub>3</sub> particles or the "interaction" of polymer and CaCO<sub>3</sub> on a microscopic scale, which leads to a coherent view with S<sub>pp</sub>. On the role of block copolymer additives for calcium carbonate crystallization : Small angle neutron scattering investigation by applying contrast variation Schwahn, Dietmar Cölfen, Helmut

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