Abstract
The partitioning of a diblock copolymer (AB) and a triblock copolymer (ABA and BAB) into a pore, at a condition similar to that employed in the experimental liquid chromatography at the critical condition (LCCC), was investigated by lattice Monte Carlo simulations with self-avoiding-walk chains. The B block is set at the predetermined critical condition where the partition coefficient of a homopolymer B has a least dependence on its chain length, and hence becomes chromatographically “invisible”. The A block is set at the size-exclusion mode and is chromatographically “visible”. The partition coefficients of these copolymers were compared with that of a homopolymer A with the same (total) length of the visible A block(s). The partition coefficient of a diblock, KAB, was found to be larger than KA, especially when the A block was short and the B block was long. The difference tends to vanish with an increase in the A block length or a decrease in the B block length. A smaller pore also tends to decrease th...
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