In March 2026, the core knowledge point in the polymer material field - polymer chain configuration has attracted industry attention. As the "innate factor" determining material properties, it has become the key to solving the performance differences of similar raw materials. Configuration refers to the spatial arrangement of atoms in molecules fixed by chemical bonds, which can only be changed by breaking bonds, essentially different from the freely changeable conformation. It is mainly divided into three types: optical isomerism, geometric isomerism and linkage isomerism, directly affecting the crystallinity, mechanical properties and thermal stability of materials. Optical isomerism determines the regularity, with isotactic polypropylene having high rigidity and atactic polypropylene being soft. Geometric isomerism is determined by double bonds, with cis-1,4-polybutadiene being rubber with excellent elasticity and trans-form being hard plastic. Linkage isomerism affects processability, only polyvinyl alcohol with head-to-tail linkage can produce qualified vinylon fibers. The industry points out that the configuration is determined by the polymerization process. Materials with regular configuration have better heat resistance and strength, while those with disordered configuration are softer. In daily production, it is necessary to avoid misunderstandings such as confusing configuration and conformation, and select raw materials on demand. For more information, please click: https://www.tiktok.com/@mia_iota/video/7597717976720149782