Opportunities arising from the use of the rheometric quartz crystal microbalance (RheoQCM) as a fixed frequency rheometer operating at 15 MHz are discussed. The technique requires the use of films in a specified thickness range that depends on the mechanical properties of the material of interest. A regime map quantifying the appropriate thicknesses is developed, based on the properties of a highly crosslinked epoxy sample that is representative of a broad class of polymeric materials. Relative errors in the measured film properties are typically in the range of several percent or less and are minimized by using a power law model to relate the rheological properties at two different resonant harmonics of the quartz crystal. Application of the RheoQCM technique is illustrated by measuring the temperature- and molecular weight-dependent properties of polystyrene and poly(methyl methacrylate) in the vicinity of the glass transition.

中文翻译：

---

具有石英晶体谐振器的聚合物系统的高频动态特性研究。

讨论了使用流变石英微天平（RheoQCM）作为工作在15 MHz的固定频率流变仪所带来的机会。该技术要求使用特定厚度范围内的薄膜，该厚度范围取决于目标材料的机械性能。基于高度交联的环氧样品的特性（代表了一大类聚合物材料），开发了一种量化适当厚度的状态图。测得的薄膜性能的相对误差通常在百分之几或更少的范围内，并通过使用幂定律模型将石英晶体的两个不同谐振谐波下的流变特性联系起来，将其最小化。