Miccio Luis A, Sill Clemens, Wehlack Carsten, Schwartz Gustavo A
Centro de Física de Materiales (CSIC-UPV/EHU)-Materials Physics Center (MPC), P. M. de Lardizábal 5, 20018 San Sebastián, Spain.
Donostia International Physics Center, P. M. de Lardizábal 4, 20018 San Sebastián, Spain.
Polymers (Basel). 2024 Dec 17;16(24):3508. doi: 10.3390/polym16243508.
This work connects the calorimetric responses of different rubber-resin blends with varying resin contents with their alpha relaxation dynamics. We used differential scanning calorimetry and broadband dielectric spectroscopy to characterize the calorimetric and dielectric responses of styrene-butadiene, polybutadiene, and polyisoprene with different resin contents. To model the results, we used the Gordon-Taylor equation combined with an extension of the Adam-Gibbs approach. Thus, we propose a simple and effective model that allows us to estimate the blend dynamics from the temperature dependence of the relaxation times of the pure components and the calorimetric measurement of the glass transition temperature of only one blend composition. By estimating an effective interaction parameter from calorimetry, we achieved accurate alpha relaxation dynamics predictions for different resin concentrations. Our highly predictive approach provides a realistic description of the expected dynamics. This study offers valuable insights into the dynamic properties of polymer compounds, paving the way for the fast and effective development of advanced and more sustainable materials.
这项工作将不同树脂含量的橡胶-树脂共混物的量热响应与其α弛豫动力学联系起来。我们使用差示扫描量热法和宽带介电谱来表征不同树脂含量的丁苯橡胶、聚丁二烯和聚异戊二烯的量热和介电响应。为了对结果进行建模，我们使用了戈登-泰勒方程并结合了亚当-吉布斯方法的扩展。因此，我们提出了一个简单有效的模型，该模型使我们能够根据纯组分弛豫时间的温度依赖性以及仅一种共混物组成的玻璃化转变温度的量热测量来估计共混物的动力学。通过从量热法估计有效相互作用参数，我们对不同树脂浓度实现了准确的α弛豫动力学预测。我们的高度预测性方法提供了对预期动力学的现实描述。这项研究为聚合物化合物的动态特性提供了有价值的见解，为快速有效地开发先进且更可持续的材料铺平了道路。
