The chain length of 60-70 DMS repeating units for both mono- and bi-functional PDMS appeared to be long enough to prevent the surface reorganization during the CA measurements.

• 当PDMS链的重复单元数达到60-70时，单羟基或双羟基封端的聚PDMS都足以阻止在接触角测量过程中发生表面重排。