Sasimowski Emil, Majewski Łukasz, Jachowicz Tomasz, Sąsiadek Michał
Department of Technology and Polymer Processing, Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka Street, 20-618 Lublin, Poland.
Institute of Mechanical Engineering, Faculty of Mechanical Engineering, University of Zielona Góra, 4 Prof. Szafrana Street, 65-516 Zielona Góra, Poland.
Materials (Basel). 2021 Sep 14;14(18):5293. doi: 10.3390/ma14185293.
This paper presents the assumptions of a thermodynamic equation of state for polymers according to the Renner model. The experiments involved extruding a biocomposite based on poly(butylene succinate) that was filled with ground wheat bran with its size not exceeding 200 μm. The biocomposite was produced in pellet form with three different contents by weight of wheat bran, i.e., 10%, 30% and 50%. All specimens were examined for their thermodynamic p-v-T characteristics. Taking advantage of the SimFit module of Cadmould 3D-F, experimental results were used to determine the coefficients of thermodynamic equation of state for the tested biocomposite according to the Renner model. The coefficients were then used to calculate transition temperature and to create diagrams illustrating the relationship between pressure, temperature and specific volume for the tested biocomposite. The obtained results can serve as a basis for assessing the suitability of the biocomposite for injection molding, selecting technological parameters of this process, as well as for analyzing shrinkage and defects of injection-molded parts.
本文介绍了基于伦纳模型的聚合物热力学状态方程的假设。实验包括挤出一种以聚丁二酸丁二醇酯为基础的生物复合材料，该材料填充了尺寸不超过200μm的磨碎麦麸。生物复合材料制成颗粒形式，麦麸的重量含量有三种不同比例，即10%、30%和50%。对所有试样的热力学p-v-T特性进行了检测。利用Cadmould 3D-F的SimFit模块，根据实验结果确定了基于伦纳模型的被测生物复合材料的热力学状态方程系数。然后利用这些系数计算转变温度，并绘制图表来说明被测生物复合材料的压力、温度和比容之间的关系。所得结果可作为评估该生物复合材料用于注塑成型适用性、选择该工艺技术参数以及分析注塑件收缩和缺陷的依据。
