Mn2Al-LDH- and Co2Al-LDH-stearate as photodegradants for LDPE film

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Authors

Magagula, Bheki
Nhlapo, N.S. (Nontete Suzan)
Focke, Walter Wilhelm

Journal Title

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Volume Title

Publisher

Elsevier

Abstract

The layered double hydroxides (LDH) Mn2Al-LDH-stearate and Co2Al-LDH-stearate were prepared by a surfactant-assisted intercalation of the corresponding precursor LDH-CO3 forms. These compounds were evaluated as potential photodegradant additives in low density polyethylene films with a thickness of ca. 40 mm. They were incorporated into blown polyethylene films via a 10% masterbatch. The films were subjected to accelerated ageing in a QUV weatherometer. The machine was fitted with A320 lamps and operated on a dry cycle at 63 C and an irradiance of 0.67 W/m2. It was found that 100 h of QUV exposure was sufficient to cause mechanical embrittlement of films containing as little as 0.1% of either active additive.

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Keywords

Layered double hydroxide (LDH), Cobalt, Manganese, Photodegradation, Polyethylene

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Citation

Magagula, B, Nhlapo, N & Focke, WW 2009, 'Mn2Al-LDH- and Co2Al-LDH-stearate as photodegradants for LDPE film', Polymer Degradation and Stability, vol. 94, pp. 947-954. [www.elsevier.com/locate/polydegstab]