Electrochemical studies of interfacial polymerisation processes.

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Oseland, Elizabeth E.;
  • Subject: QD

This thesis describes how electrochemical analytical techniques have been used to understand some of the physicochemical processes that underpin interfacial polymerisation reactions. A few of the reaction systems studied are currently used in the agrichemical industry f... View more
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    Stoichiometric proportions of HMDA were present in the aqueous phase (see Table 4.5). ...............................................................................................................................142 Figure 4.25 Mean impedance over time with standard deviation recorded using the setup shown in Figure 4.1. DC potential was +0.2 V with an oscillation of 10 mV, frequency was 0.5 Hz....................................................................................................142 Figure 4.26 Impedance versus time profiles recorded during poly(urea) film formation using (a) 34.5 mM TDI/ 16 mM PMPPI (0.5 wt.%), (b) 6.9 mM TDI/ 3.2 mM PMPPI (0.1 wt.%), (c) 3.45 mM TDI/ 1.6 mM PMPPI (0.05 wt.%), (d) 0.69 mM TDI/ 0.32 mM PMPPI (0.01 wt.%) and (e) 0.069 mM TDI/ 0.032 mM PMPPI (0.001 wt.%) in the DCE phase. DC potential was +0.2 V with an oscillation of 10 mV, frequency was 0.5 Hz. .................................................................................................................................145 Figure 4.29 Impedance versus time profiles recorded during poly(urea) film formation using a 1:10 molar ratio of TDI:PMPPI (0.34 mM TDI and 3.4 mM PMPPI in the DCE phase). DC potential was +0.2 V with an oscillation of 10 mV, frequency was 0.5 Hz.

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