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. 2017 May 19;21:7. doi: 10.1186/s40824-017-0093-7

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — SEM images of 20%PEEK/80%CS specimens after ageing in PBS media for (a) 7 Days, (b) 14 Days and (c) 21 Days. (d) XRD diffraction patterns between 2θ values of 5 ^o and 60 ^o of PEEK and CSH (CaSO₄.0.5H₂O) starting powders, and powdered 20%PEEK/80%CS specimens after heat treatment prior to ageing (0 Days), and after 7 Days, 14 Days and 21 Days of ageing. An XRD pattern for PEEK from the literature confirmed the crystal structure of the polymer (•, see [30]). ICDD patterns matching CSH (CaSO₄.0.5H₂O) (, ICDD pattern 01-081-1448), CSA (CaSO₄) (, ICDD pattern 01-070-0909) and CSD (CaSO₄.2H₂O) (, ICDD pattern 00-033-0311) (CaSO₄.0.5H₂O, CaSO₄ and CaSO₄.2H₂O phases respectively) are also provided to aid in CS phase identification

Inline graphic — SEM images of 20%PEEK/80%CS specimens after ageing in PBS media for (a) 7 Days, (b) 14 Days and (c) 21 Days. (d) XRD diffraction patterns between 2θ values of 5 ^o and 60 ^o of PEEK and CSH (CaSO₄.0.5H₂O) starting powders, and powdered 20%PEEK/80%CS specimens after heat treatment prior to ageing (0 Days), and after 7 Days, 14 Days and 21 Days of ageing. An XRD pattern for PEEK from the literature confirmed the crystal structure of the polymer (•, see [30]). ICDD patterns matching CSH (CaSO₄.0.5H₂O) (, ICDD pattern 01-081-1448), CSA (CaSO₄) (, ICDD pattern 01-070-0909) and CSD (CaSO₄.2H₂O) (, ICDD pattern 00-033-0311) (CaSO₄.0.5H₂O, CaSO₄ and CaSO₄.2H₂O phases respectively) are also provided to aid in CS phase identification