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采用改进的键长涨落空穴扩散算法对平板狭缝中不对称两嵌段共聚高分子熔体的微相分离进行了MonteCarlo模拟。模拟结果表明 :在强吸引壁条件下 ,靠近壁面处将形成平行于壁面的层状相 ;在弱吸引壁条件下 ,靠近壁面处将形成垂直于壁面的层状相 ;不对称共聚物在远离壁面处有丰富的微区形态。从结构因子上分析可知 ,弱吸引壁条件下不对称共聚物的结构比强吸引壁条件下更接近对称共聚物。
The Monte Carlo simulation of microphase separation of asymmetric diblock copolymerized macromolecular melts in flat slits was carried out by using the improved bond length fluctuation and void diffusion algorithm. The simulation results show that under the condition of strong suction wall, a layered phase parallel to the wall will be formed near the wall, and a layer perpendicular to the wall will be formed near the wall under weak suction wall. Asymmetric copolymer The wall is rich in micro-area morphology. From the structural factor analysis, we can see that the structure of asymmetric copolymer under the condition of weakly attracting wall is more similar to that of symmetric copolymer under strong attracting wall.