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We propose a simple scaling theory describing the variation of the mean firstpassage time (MFPT) $\tau(N,M)$ of a regular block copolymer of chain length$N$ and block size $M$ which is dragged through a selective liquid-liquidinterface by an external field $B$. The theory predicts a non-Arrhenian $\tau$vs. $B$ relationship which depends strongly on the size of the blocks, $M$, andrather weakly on the total polymer length, $N$. The overall behavior isstrongly influenced by the degree of selectivity between the two solvents$\chi$.  The variation of $\tau(N,M)$ with $N$ and $M$ in the regimes of weak andstrong selectivity of the interface is also studied by means of computersimulations using a dynamic Monte Carlo coarse-grained model. Good qualitativeagreement with theoretical predictions is found. The MFPT distribution is foundto be well described by a $\Gamma$ - distribution. Transition dynamics of ring-and telechelic polymers is also examined and compared to that of the linearchains.  The strong sensitivity of the ``capture'' time $\tau(N,M)$ with respect toblock length $M$ suggests a possible application as a new type ofchromatography designed to separate and purify complex mixtures with differentblock sizes of the individual macromolecules.Comment: 20 pages, 10 figure

Field-Driven Translocation of Regular Block Copolymers through a Selective Liquid−Liquid Interface