Undergraduate Experiments In Polymer Science

这个项目涉及一个本科聚合物的形成 实验室课程所获得的仪器用于 现有的本科实验室课程， 实验这两种工具是： 用于测定聚合物分子量的色谱装置 分布;和扭转流变仪来表征 材料的流变行为。该项目还涉及 受控环境手套箱运行的建设 聚合物合成反应学生将被引导通过 三个基本阶段的合成，表征， 捏造形成了几个小组，每个小组都有 生产和表征样品的责任 给定分子量。 特征包括 测量聚合物的分子量分布， 其时刻，研究的热流变行为的 材料，并建立两者之间的相关性。 将来自不同组的样品混合以实现 预先确定的特征并最终在模型中处理 操作如挤出、模塑或旋涂。 通过 允许使用上述仪器进行实验， 学生们对因果关系有一种自然的感觉 与材料属性相关的关系。仪器 已被选定，以尽量减少操作员培训时间，而 在通用性方面实现最有利的折衷， 复杂性和成本。

This project involves the formation of an undergraduate polymer laboratory course. The instruments acquired are used in an existing undergraduate laboratory course, for additional experiments. The two instruments are: a Size Exclusion Chromatography unit to determine polymer molecular weight distribution; and a Torsional Rheometer to characterize the rheological behavior of the material. The project also involves the construction of controlled-environment glove boxes to run polymer synthesis reactions. Students are guided through the three basic stages of synthesis, characterization, and fabrication. Several groups are formed, each with the responsibility of producing and characterizing a sample of given molecular weight. The characterization involves measurement of the polymer's molecular weight distribution and its moments, study of the thermo-rheological behavior of the material, and establishment of a correlation between the two. Samples from different groups are blended to achieve predetermined characteristics and finally processed in model operations such as extrusion, molding, or spin coating. By being allowed to experiment with the above instruments, the students develop a natural feeling for cause-and-effect relations associated with material properties. The instruments have been selected to minimize operator-training times, while achieving a most favorable compromise in terms of versatility, sophistication, and cost.