聚(苯乙烯-丙烯酰胺)/蒙脱土核壳结构增强尼龙6

Nylon 6 Composites Modified by the P(St-AM)/OMMT Core-Shell Particles

通过乳液聚合制备了以蒙脱土为核、聚苯乙烯为次外层、聚丙烯酰胺为外层的新型聚(苯乙烯-丙烯酰胺)/有机蒙脱土核壳结构,通过熔融共混法制备了该核壳结构与尼龙6的改性材料。该核壳结构的微观形态得到表征并研究了改性尼龙6的力学性能。结果表明,核壳结构中蒙脱土片层已经完全剥离,聚苯乙烯成功插入蒙脱土片层,聚丙烯酰胺成功接枝到核壳结构表面,形成了预期的P(St-AM)/OMMT纳米复合核壳结构。该核壳结构能显著提高尼龙6工程塑料的力学性能,其中弹性模量提高2.04倍,弯曲模量提高7.87倍。

The（polystyrene-polyacrylamide）/organic montmorillonite core-shell structures were synthesized through emulsion polymerization.The core of the multilayered core-shell structure was organic montmorillonite,the inner tier shell was polystyrene and the outermost shell was polyacrylamide.Core-shell structure particles were used to modify nylon 6 as a modifier.The morphology of core-shell structure and the mechanical properties of the polyamide 6（PA6） engineering plastics modified by it were characterized.The results show that the layers of organic montmorillonite（OMMT） have been fully exfoliated and the molecular chains of polystyrene（PS） have been intercalated into the galleries of OMMT in the core-shell structure.Polyacrylamide（PAM） has also been grafted onto the surface of the core-shell structure successfully.The adding of the core-shell structure can greatly improve the mechanical properties of PA6（the tensile modulus increased by 204% and the flexile modulus increased by 787%）.