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Effect of tunable styrene content on achieving high-performance poly(styrene-b-ethylene-ran-butylene-b-styrene)/graphene oxide nanocomposites
Composites Science and Technology ( IF 9.1 ) Pub Date : 2018-08-01 , DOI: 10.1016/j.compscitech.2018.05.041
Jianfeng Wang , Xiuxiu Jin , Xiaomeng Zhang , Hong Wu , Shaoyun Guo

Abstract In this paper, two poly(styrene-b-ethylene-ran-butylene-b-styrene) (SEBS) with different styrene segment content were adopted to explore the relationship between varying π-π stacking interaction and the mechanical performance of polymer composites. The results showed that the high styrene content on SEBS (SEBS-30, 30 wt% styrene segment) endows SEBS a stronger π-π stacking interaction with GO and a better dispersion of GO in the matrix than that in SEBS with low styrene content (SEBS-12, 12 wt% styrene segment), resulting in a high efficiency on enhancing the performance of SEBS. By adding 0.5 wt% GO, the tensile strength and modulus of SEBS-30 was increased by 44% and 64%, respectively, while that of SEBS-12 was increased by 24% and 39%. Furthermore, the GO also exhibited the ability to toughen SEBS via forming microcrack and GO-induced fibrillation of SEBS during the fracture process. The elongation at break and fracture toughness of SEBS-30 was increased by 10% and 64%, respectively. This study gives us a deep insight into the influence of varying π-π stacking interaction between graphene oxide (GO) and polymer on achieving high-performance polymer nanocomposites.

中文翻译:

可调苯乙烯含量对实现高性能聚(苯乙烯-b-乙烯-ran-丁烯-b-苯乙烯)/氧化石墨烯纳米复合材料的影响

摘要 本文采用两种不同苯乙烯链段含量的聚(苯乙烯-b-乙烯-茚-丁烯-b-苯乙烯)(SEBS),探讨了不同的π-π堆积相互作用与聚合物复合材料力学性能之间的关系。 . 结果表明,与低苯乙烯含量的 SEBS(SEBS-30,30 wt% 苯乙烯链段)相比,SEBS(SEBS-30,30 wt% 苯乙烯链段)上的高苯乙烯含量赋予 SEBS 与 GO 更强的 π-π 堆积相互作用以及 GO 在基质中的更好分散性( SEBS-12, 12 wt% 苯乙烯链段),从而高效地提高 SEBS 的性能。添加0.5 wt% GO后,SEBS-30的拉伸强度和模量分别提高了44%和64%,而SEBS-12的拉伸强度和模量分别提高了24%和39%。此外,GO 还表现出通过在断裂过程中形成微裂纹和 GO 诱导的 SEBS 纤维化来增韧 SEBS 的能力。SEBS-30 的断裂伸长率和断裂韧性分别提高了 10% 和 64%。这项研究让我们深入了解氧化石墨烯 (GO) 和聚合物之间不同的 π-π 堆积相互作用对实现高性能聚合物纳米复合材料的影响。
更新日期:2018-08-01
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