چکیده مقاله
Super toughness is defined as a polymer’s ability to absorb exceptionally high energy and resist fracture while maintaining structural integrity under extreme stress Super tough polymers are critical for applications requiring high impact resistance and reliability Such performance originates from multiscale mechanisms spanning molecular, microscale, and nanoscale levels At the molecular scale, coordination bonds, hydrogen bonding, and π–π interactions enhance bond strength, network stability, and reversible energy dissipation Microscale structures, including elastomer domains, phase separated interfaces, crazing, and core–shell architectures, facilitate controlled crack propagation and energy absorption Nanoscale reinforcements, such as silicon dioxide SiO₂ nanofibers, reduced graphene oxide rGO , and liquid metal LM nanoparticles, further improve load transfer, crystallinity, and mechanical robustness Representative systems, including polyamide 6 6/polyamide 6/maleic anhydride grafted polyethylene octene copolymer PA66/PA6/POE g MAH alloys and freeze dried and annealed flexible SiO₂ nanofiber/polyvinyl alcohol FDA SNF/PVA hydrogels, show that optimized composition and annealing conditions markedly enhance mechanical performance Hydrogels with 20 wt% polyvinyl alcohol PVA annealed at 120 °C for 90 min FDA20 120 90 exhibit tensile strength, toughness, and elastic modulus up to 101 times higher than reference systems and support loads over 4600 times their own weight These findings demonstrate that super toughness is a designable property achievable through hierarchical polymer engineering
کلیدواژهها
نویسندگان
Alireza Ramezani
PhD students, Department of Polymer Engineering, Amirkabir University of Technology Tehran Polytechnic , P O Box: ۱۵۸۷۵ ۴۴۱۳, Tehran, Iran
شیوه ارجاع
Ramezani, Alireza,1404,Multiscale Pathways to Super tough Polymers: From Bonds to Nanocomposites,23th International Conference on Innovation and Research in Engineering Sciences (ICIRES)
ارائهشده در
مجموعه مقالات بیست و سومین کنفرانس بین المللی نوآوری و تحقیق در علوم مهندسی22 اسفند 1404