A theory is presented for the diffusion-controlled coupling of end-functionalized A and B homopolymers at an A-B interface. The effective reaction rate coefficient kₑ is shown to exhibit a surprising degree of universality associated with the small center-of-mass diffusivity of high molecular weight polymers. For polymers below the entanglement threshold (N<Nₑ), kₑ scales with molecular weight as kₑ~1/lnN, and above the threshold kₑ~1/NlnN.
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Glenn H. Fredrickson (1996) studied this question.
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