Abstract
The application of Nano-film techonology is very popular today. Many kinds of materials and products from trantional to contemporary industry could be developed prosperously, such as adhesive tape, coating, LCD, and semi-couductor. It does imply that the Nano-film technology definitely not only has been having huge market and value, but also evoking massive concern of the scientists from academic field and industries as well. In this study, the reaearcher simulated polypropylene by molecular dynamics in Dip-coating process. The detail will be described as follows. First of all, the researcher based on molecular dynamics to simulate polypropylene chain during the process of dropping temperature in order to observe the chang of polymer conformation under different temperature. Then, the reaearcher could get the glass-transition temperature, and the results exactly matched with the consequences of the literature. Second, the researcher simulated polypropylene in Dip-coating process in nano scale by MD to observe the possible phenomena in the process and note the variation of the molecular properties. Furthermore, the researcher will interprete the physic phenomenon took place in the process, like absorbtion, slip and creep. Finally the researcher tried to chang the temperature and the velocity of board, and then found that the higher temperature, the more polymer would be dragged out. Meanwhile, the higher drag-out velocity, the more polymers would be dragged out, however, the slip pheonamena would be more serious.