Scattering from Star Polymers including Excluded Volume Effects
  In this work we present a new model for the form factor of a star polymer consisting of self-avoiding branches. This new model incorporates excluded volume effects and is derived from the two point correlation function for a star polymer.. We compare this model to small angle neutron scattering (SANS) measurements from polystyrene (PS) stars immersed in a good solvent, tetrahydrofuran (THF). It is shown that this model provides a good description of the scattering signature originating from the excluded volume effect and it explicitly elucidates the connection between the global conformation of a star polymer and the local stiffness of its constituent branch. 
Xin Li, Changwoo Do, Yun Liu, Luis E. S\'anchez-Di\'az, Kunlun Hong,   Gregory S. Smith, and Wei-Ren Chen
physics.chem-ph cond-mat.soft