physical chemistry of high polymers

例句：

1. 1. The study of physical chemistry is essential for understanding the behavior of materials at high temperatures.
   研究高分子物理化学对于理解高温下材料的行为至关重要。
2. 2. Polymers with different physical properties exhibit distinct differences in their mechanical and thermal properties.
   具有不同物理性质的聚合物在机械和热性质上表现出显著的差异。
3. 3. In the field of high polymers, researchers are exploring new methods to improve the performance of materials.
   在高分子领域，研究人员正在探索新的技术来提高材料的性能。