▎ 摘　　要

In current work, nanoconfinement effect of graphene nanoplatelets on properties of matrix-grafted graphene/polysulfide polymer nanocomposites is investigated. To this end, graphene oxide (GO) is modified with (3-chloropropyl)triethoxysilane (CPTES) to be able to participate in interfacial polymerization of 1,2-dichloroethane (DCE), 1,2,3-trichloropropane (TCP) as crosslinker and disodium tetrasulfide (Na2S4). Successful modification of GO is proved by FT-IR and Raman spectroscopies, TGA, XRD, and TEM. Different amounts of modified GO (mGO) (0.0, 0.1, 0.3, 0.5, 0.7, and 1.0 wt%) are used to prepare nanocomposites. Nanoconfinement effect of graphene nanoplatelets on the crystallinity of synthesized nanocomposites is investigated by XRD and DSC. Results showed that crystallinity of nanocomposites increases by adding graphene up to 0.7 wt% while after that crystallinity decreases. Also, DSC results showed that glass transition temperature (T-g) and melting point (T-m) of nanocomposites depend strongly on the amount of used mGO and pass through a maximum by increasing graphene content. According to TGA results, all nanocomposites were more thermally stable than neat polymer and decomposed in two stages where an optimum amount of mGO exists to investigate the highest thermal stability.