Study of the temperature-dependent stress-cracking behavior of amorphous polymer-based nanocomposites

非晶聚合物基纳米复合材料随温度变化的应力开裂行为研究

• 批准号: 270466437
• 负责人: Professor Dr.-Ing. Alois K. Schlarb
• 金额: --
• 依托单位: Lehrstuhl für Verbundwerkstoffe (CCE)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/270466437?language=en
• 关键词: Study; temperature; dependent; stress; cracking

Environmental Stress Cracking ESC of polymer materials is a serious issue in the daily use of plastics. ESC is the most common reason of failure in plastic components; around 25% of the failure cases are attributed to this phenomenon. ESC occurs at stress levels well below the yield strength or mechanical strength of the material if the part is also in contact with a liquid acting as an environmental stress cracking agent. In certain applications, such as in medicine, this can lead to life-threatening situations.The addition of the nanoscale particles in thermoplastics can affect the properties of the material positive. It was shown in the recent past that the incorporation of nanoparticles in polymeric matrices can extremely reduce the creep tendency of these materials. This is attributed to a limitation in the molecular mobility caused by the nanoparticles. In analogy is likely that nanoparticles can have an effect on the environmental stress cracking behavior. In fact, project-related preliminary work has shown basically that materials failure as a result of stress cracking can be shifted to higher failure times due to this measure. The aim of the project is to systematically explore this potential. Beside the experiment modeling and simulation by using superposition principles and rules of mixtures is strived for.

聚合物材料的环境应力破裂ESC是每天使用塑料的严重问题。 ESC是塑料组件失败的最常见原因。大约25％的失败情况归因于这种现象。 ESC发生在应力水平上，远低于材料的屈服强度或机械强度，如果零件也与充当环境应力开裂剂的液体接触。在某些应用中，例如在医学中，这可能导致威胁生命的情况。热塑性塑料中纳米级颗粒的添加会影响材料阳性的特性。在最近的过去，纳米颗粒在聚合物矩阵中的掺入可以极大地降低这些材料的蠕变趋势。这归因于由纳米颗粒引起的分子迁移率的限制。类比可能是纳米颗粒可以对环境压力开裂行为产生影响。实际上，与项目相关的初步工作基本上表明，由于这种度量，由于压力破裂而导致的材料故障可以转移到更高的故障时间。该项目的目的是系统地探索这一潜力。除了使用叠加原理和混合规则的实验建模和仿真外，还要努力。

项目成果

Effects of nanoparticle size and concentration on optical, toughness, and thermal properties of polycarbonate

纳米颗粒尺寸和浓度对聚碳酸酯光学、韧性和热性能的影响

• DOI: 10.1002/app.47634
• 发表时间: 2019
• 期刊: Journal of Applied Polymer Science
• 影响因子: 3
• 作者: Schlarb

Environmental stress cracking (ESC) resistance of polycarbonate/SiO2 nanocomposites in different media

• DOI: 10.1002/app.45451
• 发表时间: 2017-11-15
• 期刊: JOURNAL OF APPLIED POLYMER SCIENCE
• 影响因子: 3
• 作者: Nomai, Jiraporn;Schlarb, Alois K.
• 通讯作者: Schlarb, Alois K.