Grain-boundary instabilities and buckling in partially polymerized membranes.

We show that a network of quenched random grain boundaries, terminating in poly-merized patches containing excess disclinations, destabilizes the at phase of sparsely poly-merized membranes, in contrast to membranes completely polymerized in the liquid state. We argue that many of these grain boundaries will buckle, even in the absence of excess disclinity, leading to a glassy wrinkled phase consistent with recent experiments on partially polymerized vesicles by Mutz et al.