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一、研究分子运动的意义高聚物由于其长链大分子结构的特点,因此表现出与一般小分子物质不同的性质。如特有的高弹性、粘弹性、力学和电学等性能有强烈的时间(或频率)、温度依赖性。这些性能之所以殊异,固然由于其结构的特点所致,但若溯本求源,则不能不对结构、分子运动、性能三者间的关系作一深入地理解。聚甲基丙烯酸甲酯(PMMA)在室温下硬若玻璃,在100℃左右则软似橡皮;未增塑的聚氯
First, the significance of molecular motion research Polymers due to the characteristics of its long-chain macromolecular structure, and therefore show a different nature and general small molecules. Such as the unique high elasticity, viscoelasticity, mechanical and electrical properties such as a strong time (or frequency), temperature dependence. The reason why these performances are different is due to the characteristics of their structure. However, if the source is traced back and forth, the relationship between structure, molecular motion and performance can not but be understood in depth. Polymethylmethacrylate (PMMA) hard at room temperature glass, at about 100 ℃ is soft rubber; unplasticized polychlorinated