Surface rapid heating process is an efficient and green method for large-volume production of polymer optics by adopting 3D graphene network coated silicon molds with high thermal conductivity. Nevertheless, the heat transfer mechanism including the interface thermal resistance evolution between 3D graphene network coating and polymer has not been thoroughly revealed. In this study, the interface thermal resistance model was established by simplifying the contact situation between the coating and polymethylmethacrylate (PMMA), and then embedding into the finite element method (FEM) model to study the temperature variations of PMMA in surface rapid heating process. Heating experiments for graphene network were then carried out under different currents to provide the initial heat for heat transfer model. In addition, residual stress of the PMMA lens undergoing the non-uniform thermal history during molding was presented by the simulation model together. Finally, the optimal molding parameters including heating time and pressure will be determined according to calculation results of the interface thermal resistance model and microlens array molding experiment was conducted to illustrate that the interface thermal resistance model can predict the temperature of the polymer to achieve a better filling of microlens array with smooth surface and satisfactory optical performance.
Dialectical materialism is a kind of science about the common rule that nature, society and thoughts of human beings develop, and is the fundamental method for people understand the world and change it. It is urgent for the college education in ideology and politics to use the method to solve some related questions. Dialectical materialism has methodological significance to college education in ideology and politics. This paper made a brief analysis on the application of dialectical materialism in teaching in college education in ideology and politics. Keywords--teaching; ideology and political education; dialectics The college education in ideology and politics is the main platform for the ideological and political education of college students, which can correctly guide their outlook on life and sense of worth, as well as the education on patriot-
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