caa a22 4500 465786995 CHVBK 20180323112012.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF00300163 doi (NATIONALLICENCE)springer-10.1007/BF00300163 The effect of annealing on the short and long term behavior of PEEK [Elektronische Daten] [P. Jar, H. Kausch, W. Cantwell, P. Davies, H. Richard] Summary: Short and long-term tensile tests have been done on injection-moulded poly-ether-etherketone (PEEK) in order to assess the effect of annealing on its mechanical behavior. In addition to the behavior reported before, namely increases in yield and drawing stress, the annealed specimens exhibit a distinct work hardening behavior in the beginning of the drawing phase at temperatures between 80°C and 160°C. Subsequent creep tests show that the annealing treatment also influences greatly the long-term static properties of PEEK with creep rates after annealing being considerably below those recorded on the standard injection. DSC thermograms of the samples annealed for more than 20 minutes exhibit similar curves as those reported before, two endothermic peaks: a major peak at 340°C and a minor one at 260°C which is 10 K higher than the annealing temperature. The experimental results support that a type of secondary crystallites grow in the material by the annealing treatment. The existance of those secondary crystallites enhances the mechanical properties of PEEK. Springer-Verlag, 1990 Jar P. Laboratoire de Polymères, Ecole Polytechnique Fédérale de Lausanne, Ch. de Bellerive 32, CH-1007, Lausanne, Switzerland aut Kausch H. Laboratoire de Polymères, Ecole Polytechnique Fédérale de Lausanne, Ch. de Bellerive 32, CH-1007, Lausanne, Switzerland aut Cantwell W. Laboratoire de Polymères, Ecole Polytechnique Fédérale de Lausanne, Ch. de Bellerive 32, CH-1007, Lausanne, Switzerland aut Davies P. Laboratoire de Polymères, Ecole Polytechnique Fédérale de Lausanne, Ch. de Bellerive 32, CH-1007, Lausanne, Switzerland aut Richard H. Laboratoire de Polymères, Ecole Polytechnique Fédérale de Lausanne, Ch. de Bellerive 32, CH-1007, Lausanne, Switzerland aut Polymer Bulletin Springer-Verlag 24/6(1990-12-01), 657-664 0170-0839 24:6<657 1990 24 289 https://doi.org/10.1007/BF00300163 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00300163 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jar P. Laboratoire de Polymères, Ecole Polytechnique Fédérale de Lausanne, Ch. de Bellerive 32, CH-1007, Lausanne, Switzerland aut NATIONALLICENCE 700 1- Kausch H. Laboratoire de Polymères, Ecole Polytechnique Fédérale de Lausanne, Ch. de Bellerive 32, CH-1007, Lausanne, Switzerland aut NATIONALLICENCE 700 1- Cantwell W. Laboratoire de Polymères, Ecole Polytechnique Fédérale de Lausanne, Ch. de Bellerive 32, CH-1007, Lausanne, Switzerland aut NATIONALLICENCE 700 1- Davies P. Laboratoire de Polymères, Ecole Polytechnique Fédérale de Lausanne, Ch. de Bellerive 32, CH-1007, Lausanne, Switzerland aut NATIONALLICENCE 700 1- Richard H. Laboratoire de Polymères, Ecole Polytechnique Fédérale de Lausanne, Ch. de Bellerive 32, CH-1007, Lausanne, Switzerland aut NATIONALLICENCE 773 0- Polymer Bulletin Springer-Verlag 24/6(1990-12-01), 657-664 0170-0839 24:6<657 1990 24 289 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer