采用乳液聚合方法制备了一系列不同丙烯腈(AN)含量的苯乙烯-丙烯腈共聚物(SAN),将其与聚偏氟乙烯(PVDF)共混,考察了AN含量对PVDF/SAN共混物性能的影响.动态力学热分析结果表明,随着AN含量增加,PVDF的Tg向高温移动,PVDF与SAN的相容性提高.X射线衍射仪测试得出PVDF结晶为α晶型,不同AN含量的SAN对PVDF的晶型没有影响.差示扫描量热分析发现PVDF及其共混物中,PVDF具有双重熔融行为.随着AN含量增加,PVDF结晶温度向低温方向有所移动,结晶能力降低.扭矩测试发现,PVDF具有较高的黏度,SAN的引入降低了PVDF的黏度.接触角结果表明SAN提高了PVDF的表面亲水性,AN含量越高,共混物极性越大,材料表面亲水性越强.
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