Dept. of Chemical Engineering and Biotechnology, BP Institute, University of Cambridge, Madingley Road, Cambridge CB3 0EZ, UK.
J Colloid Interface Sci. 2010 Dec 15;352(2):542-8. doi: 10.1016/j.jcis.2010.08.074. Epub 2010 Sep 20.
The stress at which latex films crack during drying was investigated using beam bending. Two systems were investigated: (i) poly(methyl methacrylate/butyl acrylate) particles cast as thin films to examine the effect of film thickness on cracking film stress and (ii) polystyrene particles dried as drops to investigate the effect of particle size. Results indicated an inverse relationship between film thickness and film stress, whilst film stress was shown to be independent of the original particle size. These outcomes were in good agreement with Tirumkudulu and Russel's theoretical analysis [M.S. Tirumkudulu and W.B. Russel, Langmuir 21 (2005) 4938], albeit the measured stress values were almost twice the theoretical estimation.
使用梁弯曲法研究了乳胶膜在干燥过程中开裂时的应力。研究了两种体系：（i）聚（甲基丙烯酸甲酯/丙烯酸丁酯）颗粒铸造成薄膜，以研究薄膜厚度对开裂膜应力的影响；（ii）聚苯乙烯颗粒作为液滴干燥，以研究颗粒尺寸的影响。结果表明，薄膜厚度与薄膜应力呈反比关系，而薄膜应力与原始颗粒尺寸无关。这些结果与 Tirumkudulu 和 Russel 的理论分析[M.S. Tirumkudulu 和 W.B. Russel，Langmuir 21（2005）4938]非常吻合，尽管测量的应力值几乎是理论估计值的两倍。
