After aging this peak increases slightly, according to the conditioning temperature increases (185 C for a refurbishment of 130 C and) 187.1 c in the case of 160 C). Figure 2. Curves calorimetric (DSC) sweep of PA 12, without aging (red curve), conditioned for 12 h / 130 C (green curve) and conditioned for 12 h / 160 C. Below, every 3 hours, the measurements were made of the melt flow index both conditioned at 130 C and 160 C 12 PA and the mixture of 75% PA 12 conditioned + 25% PA 12 unconditioned. The results obtained are included in Figure 3 and Figure 4. Figure 3. PA12 Figure 4 MFI.
Mix of 75% MFI PA12 acondicionada+25% PA unconditioned both figures show a similar trend, the melt flow index experienced a gradual decrease as it increases the conditioning time. Moreover, in both cases the MFI of the samples conditioned at 160 C are lower than those obtained from the air conditioners at 130 C. CONCLUSIONS according to the initial results presented in this paper, shows that the material undergoes changes in the structure of the material Depending on the temperature and exposure time. Within the study of recycling of PA 12 powder for sintered, upcoming activities of the project will focus on studying the influence of the location of the powder in the same properties, references – Krassimir Dotchev. Recycling of polyamide 12 based powders in the sintering process lacer. Rapid Prototyping Journal 15/3 (2009) 192-203. -Ryan Haislmaiter. Investigation of the Thermophysical properties of Recycled Polyamide Materials used for Selective Laser Sintering. ACKNOWLEDGMENTS this project is partially funded by the Ministry of science and innovation, as well as by the European Union within the operating programme of RDI by and for the benefit of the ERDF (PSE-020000-2009-1) (technological Fund) firms and the IMPIVA (IMIDIC/2009/45). Original author and source of the article.