Abstract:

A new type of waterborne poly(vinylidene fluoride) (PVDF) emulsion is studied by means of laser particle size analyzer, SEM, FT-IR and ¹H NMR. It is verified that the waterborne PVDF emulsion has a core-shell structure. In order to enhance its application performance, a two-component waterborne acrylic resin is one of the most promising materials for core-shell structure waterborne PVDF modification. However, the miscibility of the blend is the key influential factor on it. The results show that the polyurethane cured A2470 acrylic resin is partially compatible with the waterborne PVDF as observed by SEM, FT-IR and DSC. The interface of the “sea-island” phase is blurred and fewer; FT-IR peaks associated with the C-F bond are shifted to a certain extent, and the melting point of waterborne PVDF resin in blends moves 5 ℃ towards the low temperature direction, which is the best in blends of polyurethane cured acrylic resin and waterborne poly(vinylidene fluoride).

Key words: miscibility, waterborne poly(vinylidene fluoride), acrylic resin, fluorocarbon resin

摘要：

分析了一种新型水性PVDF氟碳树脂乳液(FCF-301)的粒径、SEM、红外及核磁氢谱特征,分析表明氟碳乳液为核壳型。为进一步提升其应用性能,采用双组分水性丙烯酸树脂对核壳型水性PVDF进行复合改性。其中,树脂的共混相容性是复合改性的关键要素。通过SEM、FT-IR、DSC对溶液铸膜法制备的共混薄膜表征结果对比可知:聚氨酯固化丙烯酸树脂A2470与水性PVDF树脂FCF-301共混呈部分相容:其海岛结构相分离现象少,且相界面模糊;与碳氟键相关的红外吸收峰有一定程度迁移;共混薄膜材料中水性PVDF树脂FCF-301熔点向低温方向迁移-5 ℃,为备选双组分共混相容体系中最优。

关键词: 相容, 水性PVDF, 丙烯酸树脂, 氟碳树脂

CLC Number: 

• TQ630.4 +3