A Multi-Scale Approach for Understanding the Role of the Interphase in Polymer Matrix Composites

了解界面在聚合物基复合材料中的作用的多尺度方法

• 批准号: 9900383
• 负责人: Jon Kellar
• 金额: $ 20万
• 依托单位: South Dakota School of Mines and Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-15 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9900383&HistoricalAwards=false
• 关键词: Multi; Scale; Approach; Understanding; Role

The focus of the research is a multi-scale(molecular-nanometer-micrometer) investigation of the interphase and itsrelationship to polymer matrix composite (PMC) performance. The firstobjective of the research is to monitor the chemistry of the interphaseregion in situ, and in real-time during the polymer curing cycle. Thesecond objective is to measure the size and the mechanical properties of theinterphases that result as a function of silane coupling agent surfacetreatments. The third objective is the measurement of the micromechanicalperformance of a model PMC system. Several tasks are involved to meet the research objectives. Thefirst task will involve in situ reaction monitoring of a model polymer usinga novel Fourier transform infrared fiber optic sensor system which allowsdirect monitoring of interphase chemistry. Experiments will be performedusing polymer/curing agent mixtures on unmodified glass fibers, and polymercuring followed as a function of time at elevated temperature. Next, silanecoupling agent surface treatments will be performed on the glass fibers andthe organofunctional reactivity determined simultaneously with curingagent/polymer reactivity. The second task in the proposed research will be the nano-mechanicalproperty characterization after surface treatment and polymer curing.Atomic force microscopy and nanoindentation will be used to characterize theinterphase region. These results will be correlated with the in situinfrared data from the first task, in particular, the role oforganofunctional reactivity and polymer curing on the resultant interphaseproperties. The third task will involve measurement of the micromechanicalbehavior of the model PMC through the use of the microbond test method.Results obtained during this portion of the research will be correlated withthe first two tasks mentioned above.

研究的重点是多尺度（分子-纳米-微米）研究界面相及其与聚合物基复合材料（PMC）性能的关系。 本研究的第一个目的是在聚合物固化过程中实时监测界面区的化学性质。 第二个目标是测量作为硅烷偶联剂表面处理的函数的界面的尺寸和机械性能。 第三个目标是测量模型PMC系统的微观力学性能。 要实现研究目标，需要完成多项任务。 第一个任务将涉及原位反应监测的模型聚合物使用一种新的傅里叶变换红外光纤传感器系统，允许直接监测的界面化学. 实验将在未改性的玻璃纤维上使用聚合物/固化剂混合物进行，然后在升高的温度下作为时间的函数进行聚合物固化。 接下来，将对玻璃纤维进行硅烷偶联剂表面处理，并同时测定有机官能反应性和固化剂/聚合物反应性。第二项研究工作是表面处理和聚合物固化后的纳米力学性能表征，采用原子力显微镜和纳米压痕技术对界面区域进行表征. 这些结果将与第一个任务的原位红外数据，特别是有机官能反应性和聚合物固化对所得界面性质的作用相关。 第三个任务是通过微粘结试验方法测量模型PMC的微观力学行为，这部分研究的结果将与前面提到的前两个任务相关联。