  In this paper we revisit a singular bulk potential in the Landau-de Gennes
free energy that describes nematic liquid crystal configurations in the
framework of the Q-tensor order parameter. This singular potential, called
Ball-Majumdar potential, is introduced in [3], and is considered as a natural
enforcement of a physical constraint on the eigenvalues of symmetric, traceless
Q-tensors. Specifically, we establish blowup rates of both this singular
potential and its gradient as Q approaches its physical boundary.
