Following an investigation undertaken by the publisher, we have determined that some of the figures in the paper cited below were inappropriately manipulated prior to submission. We hereby retract the paper. Reasonable effort should be made to remove references to the paper. All authors have been notified of the retraction, and we have kept a record of any responses received. Citation of Retraction Statement: ASTM International, “Retraction Statement: Enhanced Thermal and Mechanical Properties of Polymer Reinforced with Slightly Functionalized Graphene Nanoplatelets,” Journal of Testing and Evaluation 54, no. 3 (2026): e20268997, https://doi.org/10.1520/JTE20268997 Citation of Retracted Article: U. O. Uyor, A. P. I. Popoola, O. M. Popoola, and V. S. Aigbodion, “Enhanced Thermal and Mechanical Properties of Polymer Reinforced with Slightly Functionalized Graphene Nanoplatelets,” Journal of Testing and Evaluation 47, no. 4 (July/August 2019): 2681-2692, https://doi.org/10.1520/JTE20180336