添加剂诱导聚偏氟乙烯形成γ结晶相的方法

The Method of Additive Induced Polyvinylidene Fluoride to Form γ Crystal Phase

聚偏氟乙烯(PVDF)是一种综合性能优异的多晶型高分子材料,在涂料、电线电缆、分离膜、热缩材料等领域应用广泛。PVDF可形成α、β、γ、δ和ɛ五种类型结晶相,具有不同的分子链构象和物理化学性质。其中,α、β和γ结晶相是PVDF中常见的结晶相类型,但是γ结晶相的制备相对比较困难。添加剂的引入是促进PVDF中γ结晶相形成的一种简单有效方法。

Polyvinylidene fluoride(PVDF)is a polycrystalline polymer material with excellent comprehensive properties.It is widely used in coatings,wires and cables,separation membranes,heat shrinkable materials and other fields.PVDF can form f ive types of crystalline phases:α,β,γ,δandɛ,with different molecular chain conformations and physical and chemical properties.Among them,α,βandγcrystalline phases are common types of crystalline phases in PVDF,but the preparation ofγcrystalline phases is relatively diff icult.The introduction of additives is a simple and effective method to promote the formation of gamma crystalline phase in PVDF.