▎ 摘　　要

This work discussed the deformation-induced structure changes of poly(4-methyl-1-pentene)/alkylated graphene oxide (TPX/GO-ODA) nanocomposites during uniaxial stretching at a certain temperature (80 degrees C). Based on crystalline behaviors of samples during deformation, the strain range could be divided into two regions. Within Region I, the melting temperature of TPX rose with strain; and the figures for TPX/GO-ODA were volatile; the crystallinity of these two samples showed a similar trend. Within Region II, melting points of two samples did not experience any remarkable changes; the figure for TPX/GO-ODA was higher than TPX. However, the crystallinity of two samples had a similar pattern; and the figures for nanocomposites showed a moderate increase and reached the plateau region at a greater strain. Wide-angle X-ray scattering demonstrated that crystal structure of samples could be destroyed during deformation. Small-angle X-ray scattering showed that the spherulitic structure of samples would transform into fibrillar structure. And the fibrillar structure size of TPX/GO-ODA was smaller than that of TPX according to Guinier approximation. All data revealed that GO-ODA not only prevented crystal structures from being destroyed within Region I, but also it might restrict rearrangements of molecular chains and crystal fragment within Region II. POLYM. COMPOS., 40:E493-E500, 2019. (c) 2018 Society of Plastics Engineers