Macromolecular Materials and Engineering: Nanoscale Cellular Foams From A Poly(Propylene)-Rubber Blend.(Reprint)

Foams with nano/micro-scale cellular structures were prepared from semicrystalline PP and thermoplastic PS elastomers (hydrogenated PS-block-polybutadiene-block-PS rubber and hydrogenated PS-block-polyisoprene-block PS) using a temperature-quench batch physical foaming method with carbon dioxide as the blowing agent. By taking advantage of the crystalline form of PP, viscoelasticity was increased in the matrix and carbon dioxide solubility was lowered in the matrix more than in the disperse domains so that bubble nucleation …