As Guest Editors of the Special Issue "Advances in Thermal and Mechanical Properties of Polymeric Materials", we congratulate all the authors of the published works and thank the reviewers for their time and invaluable comments and suggestions that raised the rank and substantive value of this reprint. We also thank the Editors-in-Chief of Materials for the opportunity to collaborate with the journal, as well as the Section Managing Editor, Ms.

Fay Liu, for her kind support and cooperation. We work as associate professors at the Faculty of Mechanical Engineering and Computer Science at Czestochowa University of Technology.

Our scientific interests include polymeric materials and their composites, in terms of thermomechanical tests. Therefore, we decided to open this Special Issue, which turned out to be a huge success.

Its goal was to publish innovative papers dealing with the issues of the thermomechanical properties of polymers and composites, structure of polymeric materials, combustion and co-combustion of polymeric materials with fuels and waste, thermal analysis of materials, emission of pollutants during thermal processes, modeling and computer simulation of polymeric material property changes, modeling and computer simulation of exploitation and thermal processes, and recycling of polymeric materials. In this reprint, we emphasized the essence of these issues.

We encourage you to read this reprint. .