聚丙烯酸接枝聚甲基丙烯酸甲酯共聚物的表面性质及粘度性质的研究

Study of the Properties of Surface Wetting and Viscosity of Polyacrylic Acid Copolymer with PMMA Train

聚丙烯酸接枝聚甲基丙烯酸甲酯共聚物的表面有其特殊性质:水滴在其表面上形成的接触角基本上与其组成无关,而丙烯酸——甲基丙烯酸甲酯无规共聚物的表面接触角却与其组成有密切关系;接枝共聚物在DMF溶液中,其粘度表现出有趣的现象。

The contact angle of water droplet on the PAA-g-PMMA g()ait copolymer film were measured. The curve of contact angle to PAA / PMMA shows that PMMA accumulates on the film surface when cast from DMF and DMSO,but does not do so when cast from the mixed solution of methanol and DMF(3/7). The relation between viscosity and T shows that PMMA graft train possesses an intermoleculer domains in DMF and H-bond. The diagram of ηsp/c-C curve indicates the polyelectrolyte property exhibited by the copolymer.