摘要
利用光相关光谱测定了不同浓度的聚丙烯酸酯核／壳乳液和聚苯乙烯标样乳液在室温下的粒度，确定了两体系可测粒度的浓度范围，随粒度多分散性增加，可测粒度的浓度范围减小，且浓度范围与试样粒度有关。测定结果进一步表明，随测定试样的浓度增加，粒度下降，根据Ｓｔｏｋｅｓ－Ｅｉｎ－ｓｔｅｉｎ公式，求出了粒子移动扩散系数。
The particle size of polyacrylate core/shell latex and polystyrene standard latex in different concentrations has been measured by Photon Correlation Spectroscopy at room temperature, and the range of the concentration suitable for the measurment has been determined through the experiments. As the size polydispersity increases, the suitable concentration range for the meausrment decreases. The results show that the particle size decreases with the concentration increases. We have obtained the translational diffusion coefficients from Stokes Einstein equation. Futhermore, the translational diffusion coefficient in zero concentration has been derived from the plotting of the translational diffusion coefficients to the concentrations.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1996年第6期92-95,共4页
Polymer Materials Science & Engineering
