PBA-b-PHFBMA嵌段共聚物的制备及在涂料中的应用

The Synthesis and Applications of Poly(Butyl Acrylate-b-Hexafluorobutyl Methacrylate)Block Copolymers

利用原子转移自由基聚合(ATRP)法合成了丙烯酸丁酯-甲基丙烯酸六氟丁酯嵌段共聚物(PBA-b-PHFBMA),并以核磁共振谱和凝胶渗透色谱对共聚物进行了表征。将制备的含氟嵌段共聚物应用于丙烯酸酯涂料树脂,对其性能进行了研究。结果表明,在丙烯酸酯树脂中加入含氟嵌段共聚物后,树脂的表面性能及耐老化性能有了明显的提高。含氟嵌段共聚物的加入量在10%以上时,丙烯酸酯树脂的表面接触角可从73°提高到90°以上;经紫外光加速老化1700h后,树脂的保光率达90%以上。且含氟嵌段共聚物的加入并不影响丙烯酸酯树脂的其它漆膜性能。

Poly（butyl acrylate-b-hexafluorobutyl methacrylate） block copolymers were synthesized by atom transfer radical polymerization（ATRP） and characterized by nuclear magnetic resonance（1H-NMR） and gel permeation chromatography（GPC）.The fluoro-containing acrylic coating resin was prepared by mixing the block copolymers with conventional acrylic resin.The results show that the surface and anti-aging properties of the acrylic resins are greatly improved by adding the fluoro-containing block copolymers.When the amount of fluoro-containing block copolymer is more than 10%,the surface contact angle of the acrylic resin increases from 73° for pure acrylic resin to larger than 90° for the acrylic resin containing block copolymers,and the gloss retention of the resin is improved from 80% for the acrylic resin to about 90% for the acrylic resin containing block copolymers after UV irradiation about 1700 h.And the other conventional performances of acrylic coating resin are remained unchanged.