Poly (decamethylene terephthalamide/decamethylene isophthalamide)-block-polyvinyl alcoho) (PA10T/10I-PEG) copolymer/graphene oxide (GO) composites were prepared via in-situ melt polymerization and two different nano-filler addition approaches were compared. The relationship between the micro-structure and performance of the elastomer composites prepared by one-step and two-step methods was explored. The results show that the two-step method significantly promoted the dispersion of the GO in a polymer matrix, and facil-itated the grafting of more hard molecular chains. Thus, the elastic modulus and tensile strength of the nano-composite have been significantly improved by the presence of GO. This was because of the strong interaction between the functional groups on the surface of the GO and the hard molecular chains. This would be also be favorable to load transfer across the interface. Additionally, the elongation at the break of composites increased by 10％with the addition of a small amount of GO (0.2％wt). This is because hard domains tend to be enriched on the surface of GO in composites and act as a lubricating layer at the interface between the GO and matrix, leading to increased deformation ability. This work provides an effective strategy to prepare elastomer composites with high strength and toughness.

College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China;Analytical and Testing Center, Sichuan University, Chengdu, 610064, China;Jiangsu JITRI Advanced Polymer Materials Research Institute Co., Ltd, China;State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China

[1]Xiao-bo Fu;Xin Tong;Jia-cao Yang;Gang Zhang;Mei-lin Zhang;Xiao-jun Wang;Jie Yang-.In situ polymerization preparation and mechanical properties of nanocomposites based on PA10T/10I-block-PEG copolymer and graphene oxide)[J].纳米材料科学（英文版）,2022(03):276-284

PA10T,10I,decamethylene,terephthalamide,isophthalamide,alcoho,itated

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