  The transient network literature up to now has considered that the connection
probability of a free strand does not depend on the strand extension, in
contrast with the disconnection probability. We argue that, on thermodynamic
grounds, both probabilities must have the same dependence on the strand
extension. We propose a model for the pinning/snapping of elastic strands
reversibly binding to sticky sites, giving explicit expressions for the
connection and disconnection rates.
