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The ordered mesostructures formed by block copolymers on the nanoscale via the self-assembly have attracted a lot of attention of high-performance material science due to its important, potential applications, especially the single gyroid network, single diamond network, and the single plumber′s nightmare (SPN) network. These three networks are very important in the fields of three-dimensional photonic crystals. Whereas single gyroid and single diamond have been stabilized in block copolymers by adjusting the chain architectures, blending, and using multicomponent systems, so far, no effective way has been found to stabilize the SPN network. Considering such situations, by designing B1A1B2A2C3B3, B1A1B2A2C3, B1A1C2B2A2C3, B1A1C2A2C3, and B1C1A1C2A2C3 multiblock copolymers and based on the simple cubic spheres to generate the unstable states via the rapid-component change of blocks, C, from B to A, the nonequilibrium kinetics of structural evolution starting from these unstable states and the corresponding mechanism as well as the effects from the number, position, and size of blocks, C, are explored. The exploration indicates that the metastable SPN network can be reached by the nonequilibrium kinetics of structural evolution after the rapid-component change of blocks, C, within a relatively wide range of volume-fraction A, which is mainly because that the symmetry of simple cubic spheres is the same as that of SPN (No.221 space group）. [ABSTRACT FROM AUTHOR]

It aims to provide feasible evidenee for eomprehensive design, reasonable arrangement and improvements of experimental teaehing effects on other bionic experimental curricula through analysis of eomprehensive and applicable effects on relevant bionic experimental courses of bionic extracted tooth model. Forty students of grade four were randomly selected as the sample. Comparable group had 20 students who were under current experimental method while the other 20 students in observation group were required to complete clinical operation process and process-making procedure of various repaired treatment. The assessment of experimental operation, experimental comprehension and satisfaction within two groups would be evaluated. The experiment Resultresults are as follows. The mean of experimental operation in experimental group was higher than that in comparable group. It illustrated that using the bionic model of extracted teeth could be greatly applied in stomatology majors with relevant experimental operation projects. It had positive teaehing effect with reasonable design and eomprehensive application among various subjects. [ABSTRACT FROM AUTHOR]