01671nam a2200217Ia 4500 MX-MdCICY 20260521091712.0 CICY B-19787 Tunable positive temperature coefficient of resistivity in an electrically conducting polymer/graphene composite Applied Physics Letters, 96(25), p.251907, 2010 The graphene nanosheet (GNS)/ultrahigh molecular weight polyethylene composite with a two-dimensional conductive network of GNSs exhibits an increasing positive temperature coefficient (PTC)of resistivity while thermally treated at a certain temperature. This anomalous phenomenon is originated from the reduced viscosity of polymer matrix, crystallization induced local flow and weak interactions among the overlapping joints of GNSs, which allow GNSs to migrate to the polymer matrix, thus weakening the conductive paths and increasing the PTC intensity. A facile approach is accordingly developed to prepare a conductive polymer composite with a tunable PTC intensity. The authors gratefully acknowledge the financial support by the National Outstanding Youth Foundation of China (Grant No. 50925311). Thanks are also given to Zhu Li from Analytical and Testing Center of Sichuan University for his help in the SEM measurements Pang, H. Zhang, Y. C. Chen, T. Zeng, B. Q. Li, Z. M. https://drive.google.com/file/d/1aMqmxOFNbqe9_0PTYJ0cY9QVvUpwQPxI/view?usp=drivesdk Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 29845 29845 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-19787 2025-06-25 16:24:37 2025-06-25 REF1