Fabrication of lightweight microcellular foams in injection-molded polypropylene using the synergy of long-chain branches and crystal nucleating agents

Unprecedented microcellular injection-molded foams of LCBPP/MD blends having cell diameter of 2.5 μm and cell density on the order of 1010 cells/cm3 were achieved at a high void fraction of 50%, reaching a nearly 4-fold increase in the tensile toughness.294