SBIR Phase II: An Innovative Normal Stress Sensor System for Complete Characterization of Polymer Shear Flow Properties

SBIR 第二阶段：用于完整表征聚合物剪切流动特性的创新法向应力传感器系统

• 批准号: 0318662
• 负责人: Seong-Gi Baek
• 金额: --
• 依托单位: RheoSense, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2006-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0318662&HistoricalAwards=false
• 关键词: SBIR; Phase; II; Innovative; Normal

This Small Business Innovation Research (SBIR) Phase II project will address several technical improvements needed for successful commercialization of a novel MEMS sensor plate containing monolithic miniature capacitive pressure sensors. As shown in Phase I, the sensor plate can be used to accurately measure the first (N1) and second (N2) normal stress differences, which are important nonlinear elastic flow properties of various classes of viscoelastic liquids. In Phase II, sensor packaging and lead transfer to the sensors will be made suitable for high volume, high quality manufacturing of sensor plates. One version will be optimized for measurements at lower pressures and another version optimized for measurements on molten commercial thermoplastics at higher temperatures and pressures. The latter version of the sensor plate will be smaller in diameter to make possible measurements on smaller samples at higher shear rates, and will contain miniature temperature sensors that will enable accurate compensation for changes in sensor calibration constant with temperature. Improvements will be tested with a wide variety of commercial polymer systems and other important classes of viscoelastic liquids. This novel sensor plate will meet the critical market need for an inexpensive instrument for fully characterizing shear flow properties of molten thermoplastics. The competing alternative technology, the force rebalance transducer (FRT) is expensive and works best with large samples. It is simpler/less expensive to adapt a sensor plate rather than a transducer to existing rheometers. Hence the sensor plate has significant commercial potential to satisfy pent-up demand for an inexpensive way to upgrade rheometers to allow flow elasticity measurements.

该小型企业创新研究（SBIR）第二阶段项目将解决成功商业化包含单片微型电容式压力传感器的新型MEMS传感器板所需的几项技术改进。 如阶段I所示，传感器板可用于精确测量第一（N1）和第二（N2）法向应力差，这是各种粘弹性液体的重要非线性弹性流动特性。 在第二阶段，传感器包装和传感器的引线转移将适合于传感器板的大批量、高质量制造。 一个版本将优化用于在较低压力下的测量，另一个版本将优化用于在较高温度和压力下测量熔融商业热塑性塑料。后一种传感器板的直径将更小，以便能够在更高的剪切速率下对更小的样品进行测量，并且将包含微型温度传感器，该微型温度传感器将能够精确补偿传感器校准常数随温度的变化。 将用各种各样的商业聚合物系统和其他重要类别的粘弹性液体来测试改进。这种新型的传感器板将满足关键的市场需求，一个廉价的仪器，充分表征熔融热塑性塑料的剪切流动性能。 竞争替代技术，力再平衡传感器（FRT）是昂贵的，最适合大样本。 将传感器板而不是换能器适配到现有流变仪更简单/更便宜。 因此，传感器板具有巨大的商业潜力，以满足被压抑的需求，以廉价的方式升级流变仪，以允许流动弹性测量。