On particle coalescence in latex films (II)
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Abstract
Particle coalescence in latex films is investigated by measuring the “smearing out process” of perdeuterated nPBMA latex particles in a matrix of protonated nPBMA using SANS. It is found that—at least in this system—there is massive interdiffusion of material of different latex particles. Diffusion constants for 70 °C and 90 °C tempering temperatures are determined. In addition, the effect of molecular mass, crosslinking and incompatibility of the matrix material is investigated. As expected, the interdiffusion decreases with increasing molecular mass, but, surprisingly, dense crosslinking of the matrix latex particles accelerates the smearing out process. Increasing incompatibility lowers the rate of the smearing out process.
Key words
Polymer diffusion diffusion constants latex films coalescence crosslinking compatibility small angle neutron scatteringPreview
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