Polypropylene components with improved mechanical properties through adjustment of the morphologies (T10# (Antr.T04))

通过调整形态改善机械性能的聚丙烯组件（T10

• 批准号: 517516156
• 金额: --
• 依托单位: Lehrstuhl für Kunststofftechnik (LKT)
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres (Transfer Project)
• 财政年份: 2023
• 资助国家: 德国
• 起止时间: 2022-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/517516156?language=en
• 关键词: Polypropylene; components; improved; mechanical; properties

Polypropylene is a commodity polymer that has not completely established a position in the laser-based powder bed fusion (PBF-LB/P) market since existing systems do not yet exploit the full potential of the polypropylene material. This is the starting point for the joint project's objectives, which mainly include improving the mechanical performance of polypropylene components through targeted micro and macrostructure modification. As a result, nucleating agents are used to adjust the crystallization modification and spherulite size of the part. First, the crystallization behavior of specific selected nucleating agents is investigated under process conditions in the laboratory to ensure that the phases are stable under process boundary conditions. Next, the process investigations are conducted with selected systems, and the mechanical properties are analyzed. Using these results, the best modifications for Polypropylene in PBF-LB/P are determined. Furthermore, a general statement about the influence of the microstructure in PBF-LB/P is made. Since the entire process chain is represented beginning with synthesis the chemical structure of polypropylene is set via in situ synthesizing (heterophasic copolymers, terpolymer of propylene-1-butene-ethylene), and the mechanical compounding (ex situ) of various polypropylene with elastomeric contents is considered. This enables a thorough examination on the impact of the various approaches to incorporating the elastic components in the polypropylene matrix on the process. Similarly, the potential for a tailored material synthesis makes it possible to investigate various elastic components, enabling the system to be specifically tailored to the needs. Overall, it is possible to fully utilize the mechanical properties of this intricate material system, revealing new applications that call for ductile material behaviors.

聚丙烯是一种商品聚合物，尚未完全在基于激光的粉末床融合（PBF-LB/P）市场中确定位置，因为现有系统尚未利用聚丙烯材料的全部潜力。这是联合项目目标的起点，该目标主要包括通过靶向微型结构修改来改善聚丙烯组件的机械性能。结果，使用成核剂来调整零件的结晶修饰和球形大小。首先，在实验室的过程条件下研究了特定选定的成核剂的结晶行为，以确保在过程边界条件下相位稳定。接下来，使用选定的系统进行过程研究，并分析机械性能。使用这些结果，确定了PBF-LB/P中聚丙烯的最佳修饰。此外，对微观结构在PBF-LB/P中的影响进行了一般性陈述。由于整个过程链是从合成开始的，因此聚丙烯的化学结构是通过原位合成（异质共聚物，丙烯-1-二乙烯的特来聚合物）以及各种聚光烯与弹性元素含量的各种聚光的。这可以彻底检查各种方法的影响，以将弹性成分在过程中掺入聚丙烯基质中。同样，定制材料合成的潜力使研究各种弹性组件成为可能，从而使系统能够根据需求进行专门量身定制。总体而言，有可能充分利用这种复杂的材料系统的机械性能，揭示了需要延性材料行为的新应用。