Hassan, Azman Impact: modification and properties of solid and foamed PVC-U Impact: modification and properties of solid and foamed PVC-U Polymers;PVC-U;Impact modifiers;Rubber toughening;Impact properties;Foamed plastics;Fracture;Toughening mechanisms;Materials Engineering not elsewhere classified 2010-12-03
    https://repository.lboro.ac.uk/articles/thesis/Impact_modification_and_properties_of_solid_and_foamed_PVC-U/9232130