The structure of siloxane in spinning finishes PU was analyzed.And the molecul ar weight of two siloxane samples was determinated by 29Si-NMR and visc omet ry and compared as well.

• 对化纤油剂PU中两组硅油的结构进行了分析，分别采用核磁共振和粘度法测定了硅油的相对分子质量，并比较了两者的测定结果。