γ-Radiation derived from clean energy has emerged as a promising technology for disposal of waste plastics. However, due to radical-mediated uncontrolled recombination, a foremost challenge remains in radiation-triggered complete degradation for thermoset plastics. Herein, the radiation-sensitive epoxy thermoset (EP-DESN) containing phenyl imine-conjugated N−N bonds (PINN bonds) and S−S bonds was designed to initiate rapid degradation at a dose of 10 kGy. The phenyl imine-conjugated linkages can stabilize the radiation-induced broken N−N bonds, overcoming radical-mediated uncontrolled recombination and cross-linking. Moreover, the phenyl-iminyl-conjugated radicals generated by PINN bond scission can cleave the active S−S bonds to promote subsequent spontaneous degradation for maximum degradation efficiency. Meanwhile, EP-DESN exhibited superior thermal robustness and chemical resistance comparable to some conventional high-performance epoxy thermosets. Using EP-DESN as a binder, we prepared recyclable carbon fiber-reinforced composites, and nondestructive recycling of value-added carbon fiber (CF) is achieved, thus facilitating the concept of a circular CF economy.

We exploit stable conjugated linkages, phenyl imine conjugated N–N bonds, for the γ-ray-induced controllable cleavage of polymer chains as a new methodology for the fabrication of γ-ray-degradable epoxy thermosets.

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Ahstract-Targeting the performance requirements of connection management in high-speed networks, an optimization of connection management is proposed, applying Move to Front ( MTF) heuristic to improve the lookup operation of connection table. The locality property of network traffic is analyzed, which is represented as a group of packets within a connection probably arrive in group in a short time. Based on the property, the MTF heuristic is applied to optimize the lookup operation of connection table, and get the MTF connection table. The implementation of optimized connection management is described. The optimization ofMTF connection table is evaluated via physical high-speed network traffic. Experimental results indicate that the lookup performance of MTF connection table is superior to that of the traditional sorted connection table.Keywords-high-speed network; connection management,· locality of network dataflow; Move to Front (MTF) heuristic 1.