Degradation of polyethylene during extrusion. II. Degradation of low‐density polyethylene, linear low‐density polyethylene, and high‐density polyethylene in film extrusion

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When this article was published, Figure 5 was printed incorrectly. It is shown here (see next page) in its correct form. (A) Molecular mass (M̄w) and polydispersity (M̄n/M̄w) for LDPE as function of exposure time, air gap, and extrusion process temperature (⧫ 260, ▪ 280, and ▴ 325°C). The value at 0 mm air gap represents the starting material. (B) Molecular mass (M̄w) and polydispersity (M̄n/M̄w) for LLDPE as function of exposure time, air gap, and extrusion process temperature (⧫ 260, ▪ 280, and ▴ 325°C). The value at 0 mm air gap represents the starting material. (C) Molecular mass (M̄w) and polydispersity (M̄n/M̄w) for HDPE as function of exposure time, air gap, and extrusion process temperature (⧫ 260, ▪ 280, and ▴ 325°C). The value at 0 mm air gap represents the starting material.