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. Author manuscript; available in PMC: 2016 Dec 10.
Published in final edited form as: J Chem Eng Data. 2015 Nov 17;60(12):3496–3505. doi: 10.1021/acs.jced.5b00752

Table 5.

Estimates of the mass diffusion constant D and concentration relaxation time τD = L2/(π2D) in a liquid sample of thickness L = 10 mm at 80 °C. The diffusion constant for TEMAH was calculated by making the visual estimate of the viscosity η ≅ 10 cP.

liquid A impurity B PVB/PVA ηA (cP) D (10−9 m2s−1) τD (h)
naphthalene nitrogen 3.6 × 105   0.97 [15] 3.6   0.8
diethyl phthalate nitrogen 2.5 × 107 20 [16] 0.23 12
diethyl phthalate maleic anhydride 8.9 × 101 20 [16] 0.16 18
TEMAH methylethylamine 2.4 × 103 10 0.37   8