液晶高分子材料PolyesterX7G黏滞系数数值计算方法研究

Numerical Study to Achieve the Viscosity Coefficients of Liquid Crystalline Polymer PolyesterX7G

热致性液晶高分子材料以其优异性能被视为微注塑行业的首选材料,应用广泛,但薄弱的研究基础跟不上应用的需求。针对热致性高分子液晶材料黏滞系数实验获取困难的问题,提出两种数值求解Leslie黏滞系数的方法,理论基础分别为Maier-Saupe理论与Doi-Edwards理论。对典型热致性液晶材料Polyester X7G的微注塑过程进行了数值模拟,并将两种求解黏滞系数的方法嵌入模拟过程。通过与实验结果的对比发现,基于Maier-Saupe理论的黏滞系数求解方法结果更加准确,与实验结果吻合度更高。文中的研究结论丰富了热致性液晶高分子材料的基础研究成果,并为该材料在微注塑行业的更广泛应用提供了参考。

Thermotropic liquid crystalline polymer is regarded as the preferred material in micro injection molding industry because of its excellent properties and widely used,but the fundamental research cannot keep up with the demand of application. Aiming at the difficulty in obtaining the viscous coefficient of thermotropic materials,two numerical methods were proposed to obtain the Leslie’s viscous coefficients. The methods were based on Maier-Saupe and Doi-Edwards theory respectively. The micro-injection molding process was simulated numerically using the typical thermotropic material PolyesterX7G,and the viscous coefficient obtaining process was embedded in the simulation. By comparing with the experimental results,the method based on Maier-Saupe theory is more accurate. The conclusions enrich the fundamental research results and provide reference for wider application of thermotropic liquid crystalline materials.