Engineering Research Equipment Grant: Interferometer/ Polariscope for Polymer Transport Study

本研究利用干涉仪/偏光镜设备获得 浓度和应力分布的准确结果（作为 位置和时间的函数） 聚合物 实验研究将进行与二乙烯 暴露于环己烷的苯交联聚苯乙烯样品， 各种温度。 特征样本长度的影响， 交联度和输送温度对浓度的影响 和应力分布将调查的新干涉 法 这些结果将被用来验证一个新的数学模型 玻璃态聚合物中液体输运模型。 该模型包含 扩散中聚合物的广义本构方程 方程 最终的输运方程可以求解各种不同的 边界条件 在其最终形式中，它可以按照 特征扩散和平均弛豫时间。 从 实验结果，人们将能够确定条件下， 其中聚合物松弛成为整体的控制因素， 运输机制

This research utilizes interferometer/polariscope equipment to obtain accurate results of the concentration and stress profiles (as a function of position and time) for penetrant transport in glassy polymers. The experimental studies will be carried out with divinyl benzene-crosslinked polystyrene samples exposed to cyclohexane at various temperatures. The effects of characteristic sample length, degree of crosslinking and transport temperature on the concentration and stress profiles will be investigated by the novel interferometric technique. These results will be used to verify a new mathematical model for liquid transport in glassy polymers. This model incorporates a generalized constitutive equation for the polymer in the diffusion equation. The final transport equation can be solved for a variety of boundary conditions. In its final form, it can be cast in terms of a characteristic diffusion and an average relaxation time. From the experimental results, one will be able to identify the conditions under which polymer relaxation becomes the controlling factor of the overall transport mechanism.