On the Property Improvement of Low Filler Loaded Polyolefine Nanocomposites

低填料用量聚烯烃纳米复合材料性能改进研究

• 批准号: 5321824
• 负责人: Professor Dr.-Ing. Klaus Friedrich (†)
• 金额: --
• 依托单位: Leibniz-Institut für Verbundwerkstoffe (IVW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2001
• 资助国家: 德国
• 起止时间: 2000-12-31 至 2005-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5321824?language=en
• 关键词: Property; Improvement; Low; Filler; Loaded

Mechanical properties of polymers can be improved by incorporating particles at the expense of deteriorated processability and increased weight due to the higher filler fraction. To overcome such disadvantages, a viable method will be developed by the present project; it allows to enhance the strength and toughness of polymers by adding only a small amount of modified nanoparticles using existing compounding techniques. This content is much lower than the one required for conventional particulate composites. Through irradiation grafting, nanoparticle agglomerates turn into a nano-composite microstructure (comprised of the nanoparticles and the grafted, homopolymerized secondary polymer), which in turn builds up a strong interfacial interaction with the surrounding, primary polymeric matrix during the subsequent mixing. Unlike the approaches for manufacturing of the other types of nanocomposites, the current method is characterized by many advantages, such as simple, low cost, easy to be controlled, and broader applicability. During the execution of the project, greatest attention will be focussed on (1) design and tailoring of the molecular structure of the grafting polymer on the nanoparticles, and (2) understanding of mechanisms of the improvement of properties through a careful characterization of the nanocomposites.

通过掺入颗粒，聚合物的机械性能可以得到改善，但代价是可加工性的恶化和由于填料含量的增加而增加的重量。为了克服这些缺点，本项目将开发一种可行的方法；它可以通过使用现有的复合技术添加少量的改性纳米颗粒来增强聚合物的强度和韧性。这一含量远低于传统颗粒复合材料所需的含量。通过辐照接枝，纳米颗粒团块转变为纳米复合微观结构（由纳米颗粒和接枝的均聚二次聚合物组成），在随后的混合过程中，纳米颗粒团块又与周围的初级聚合物基体建立了强大的界面相互作用。与其他类型的纳米复合材料的制造方法不同，该方法具有简单、成本低、易于控制、适用性广等优点。在项目执行过程中，最大的注意力将集中在(1)设计和定制纳米颗粒上接枝聚合物的分子结构，以及(2)通过仔细表征纳米复合材料来了解性能改善的机制。