Study on the nano-structure pattern of Poly(L-lactide)/Polyethylene polymer system with different concentrations by the combination of Molecular Dynamics and Dissipative particle dynamics simulations

• Main Authors: Yao-chun Wang, 王耀群
• Other Authors: Shin-Pon Ju
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/bxx8q9

碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 95 === In this article, the molecular dynamics and dissipative particle dynamics simulation method is adopted to investigate volume ratio (1:9; 3:7; 5:5; 7:3; 9:1), mixing method (blend and copolymer) and chain length effects on the microstructure of poly(L-lactide) (PLLA)/polyethylene (PE) blends. In addition to investigate those effect what we describe above, we also investigate the effect when we compress the system to get the relation between equilibrium structure and microstructure. In order to obtain the information of microstructure in the different condition, we apply the radius of gyration and end-to-end distance to explain the conformation during the transform process. We can observe that equilibrium structures and micro-structures will change when we change the volume fraction, mixture method and length. In the spatial effect, the space played an important role about the equilibrium structures, and we also observe that the mixture method will influence a lot about equilibrium structures and micro-structures.In the aspect of triblock copolymer, the arrangement affect the micro-structures and bridge-loop effect appreciably.