TY - JOUR TI - Effect of sulfonation level on solubility and viscosity behavior of low to medium charged sulfonated polystyrenes PY - 2003 AU - Carvalho, Antonio José Felix de AU - Curvelo, Antonio Aprigio da Silva T2 - Macromolecules SN - 0024-9297 PP - Washington VL - 36 SP - 5304-5310 ER -