利用滴涂法制备聚偏氟乙烯(PVDF)薄膜,分别以载玻片、铜片、聚四氟乙烯(PTEF)为衬底研究衬底、退火时间和退火温度对PVDF薄膜结晶行为的影响。实验表明PVDF在PTEF基体上更容易结晶,这是因为PTEF是非极性基体,PVDF分子链运动在界面不受限制,能够充分地重排,利于晶体的生长;延长退火时间,PVDF分子链能够充分进行重排,形成规整的结构,提高结晶性;同时提高退火温度也有利于PVDF薄膜的结晶。另外,基体作用、退火时间和退火温度不会改变PVDF晶体结构,但会不同程度地影响α和β相的含量。 Polyvinylidene fluoride (PVDF) thin films were prepared by a drop-on-drop method. The effects of substrate, annealing time and annealing temperature on the crystallization behavior of PVDF films were studied by using glass slide, copper plate and polytetrafluoroethylene (PTEF) as substrate. Experiments show that PVDF is more easily crystallized on the PTEF matrix because PTEF is a non-polar matrix and the movement of the PVDF molecular chain is not limited at the interface and can be rearranged sufficiently to facilitate the growth of the crystal. Extending the annealing time, the PVDF molecular chain can be sufficiently Rearrange to form a regular structure to improve the crystallinity; while increasing the annealing temperature is also conducive to the crystallization of PVDF film. In addition, the role of the substrate, annealing time and annealing temperature will not change the crystal structure of PVDF, but will affect the content of α and β phases to some extent.