Injection molding of cross-linked low density foams made from poly(ethylene-co-octene) resins results from simultaneous reactions occurring during the process. The ultrasonic quasi-static technique (no flow) can mimic adequately the conditions prevailing during the molding process (pressure, temperature, time). In this work, compounds prepared from resins with different MFIs are investigated, exhibiting the influence of the degree of cross-linking on the CBA decomposition, as well as the effect of viscosity on the degassing conditions. Experiments demonstrate the complexity of CBA decomposition and of gas molecules diffusion in the polymer matrix.
展开▼
