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Mechanical behavior of photopolymerized materials
Journal of the Mechanics and Physics of Solids ( IF 5.3 ) Pub Date : 2021-04-28 , DOI: 10.1016/j.jmps.2021.104456
Roberto Brighenti , Mattia Pancrazio Cosma

The photopolymerization process used for the production of additively manufactured polymers employed in advanced applications, enables obtaining objects spanning a large dimensional scale thanks to the molecular size achievable by the solidification process. In fact, the photopolymerization is based on the physical-chemical network cross-linking mechanism taking place at the nanoscale. Since the starting raw material is a liquid resin that progressively becomes solid upon the irradiation by a suitable light source, the mechanical properties – and so the corresponding mechanical response of the final printed structural material – heavily depend on the degree and distribution of the polymerization induced in the material itself. In the present study, starting from the governing equations of the light-induced polymerization process, we determine the chain density formed within the solid domain. Then, the mechanical response of photopolymerized elements obtained with different photopolymerization parameters is investigated. Moreover, the microstructure optimization of polymeric elements in relation to the achievement of the desired mechanical response with the least energy spent in the polymer's formation, is studied. Finally, some interesting considerations related to the modeling of the photopolymerization process are outlined.



中文翻译:

光聚合材料的机械性能

由于固化过程可获得的分子大小,用于生产高级应用中使用的加成聚合物的光聚合过程能够获得大尺寸的物体。实际上,光聚合基于在纳米级发生的物理化学网络交联机理。由于起始原料是液态树脂,在适当的光源照射下会逐渐变成固态,因此机械性能-以及最终印刷结构材料的相应机械响应-很大程度上取决于引发聚合的程度和分布在材料本身中。在本研究中,从光诱导聚合过程的控制方程开始,我们确定在固态域内形成的链密度。然后,研究了用不同的光聚合参数获得的光聚合元素的机械响应。此外,研究了与实现所需机械响应相关的聚合物元素的微观结构优化,而所需的机械响应花费在聚合物形成过程中的能量最少。最后,概述了与光聚合过程建模有关的一些有趣的考虑因素。研究了与所需的机械响应的实现相关的聚合物元素的微观结构优化,该过程以最小的能量花费在聚合物的形成过程中。最后,概述了与光聚合过程建模有关的一些有趣的考虑因素。研究了与所需的机械响应的实现相关的聚合物元素的微观结构优化,该过程以最小的能量花费在聚合物的形成过程中。最后,概述了与光聚合过程建模有关的一些有趣的考虑因素。

更新日期:2021-05-22
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