摘要
本工作用激光光散射和光学显微镜手段研究了聚甲基丙烯酸甲醋(PMMA)和聚醋酸乙烯酯[PVAc]共混体系相分离过程。结果表明系统的相态结构呈现较强的自相似,结构函数在大波矢处具有q^(-6)的渐近行为,相结构具有分形特征,其分形维数[Fractal Dimension]D约为1,64,初步认为结构函数的标度[Scaling]行为是由于相结构的分形特征所致。
Unmixing processes of poly (methyl methacrylate) and poly (vinyl acetate)blends were investigated by using light scattering and optical microscope techniques. The results show that there exist self-similarity and fractal behaviour in phase separation processes. In the late stage of phase separation the asymptotic behavior of scaled structure function F(x) is F(x)～x^(-6) for large values of x. The fractal dimension of phase structure is about 1.64. These imply that the fractal behaviour of phase structure may result in the scaling feature of structure function.
出处
《应用化学》
CAS
CSCD
北大核心
1992年第2期23-27,共5页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
关键词
相分离
分形
标度
PMMA/PVAC
phase separation, fractal, scaling, light scattering, structure function
