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采用旋涂法在硅片上镀聚碳酸酯薄膜.将聚碳酸酯薄膜在200℃下进行不同时长的退火处理后,利用正电子湮没多普勒展宽测量技术与原子力显微镜研究不同退火时间对聚碳酸酯薄膜结晶现象的影响.研究结果表明,慢正电子束多普勒展宽测量技术对于聚碳酸酯薄膜早期结晶行为非常敏感.随着退火时间增长,聚碳酸酯薄膜的结晶度增加,高分子结晶过程之中伴随着原子尺度的自由体积大小和浓度而变化,结晶程度与退火时间有着非常紧密的关系.
Polycarbonate film was coated on silicon wafer by spin-coating method.After annealed at 200 ℃ for different time, the films were annealed by positron annihilation Doppler spectroscopy and atomic force microscopy Carbonate film crystallization phenomenon.The results show that slow positive electron beam Doppler broadening measurement technology is very sensitive to the early crystallization behavior of polycarbonate film.With the annealing time increases, the crystallinity of the polycarbonate film increases, the polymer Crystallization process along with the atomic size of the free volume size and concentration changes, the degree of crystallization and annealing time has a very close relationship.