Thermo and photo-oxidation of functionalized metallocene high density polyethylene: Effect of hydrophilic groups

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Orden Hernández, María Ulagares de la and Montes, J. M. and Martínez Urreaga, Joaquín and Bento, Artur J. and Ribeiro, María Rosário and Pérez Tabernero, Ernesto and Cerrada Garcia, María Luisa (2014) Thermo and photo-oxidation of functionalized metallocene high density polyethylene: Effect of hydrophilic groups. Polymer Degradation and Stability, 111 . pp. 78-88. ISSN 0141-3910

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Official URL: http://www.sciencedirect.com/science/article/pii/S0141391014004030




Abstract

Incorporation of a small content of undecenoic acid is proposed as an approach to introduce polar groups within the macromolecular architecture of high density polyethylene-based materials in order to promote an easier degradation after their useful service life. The influence of these hydrophilic groups during thermo and photo-oxidation processes has been then evaluated by several complementary techniques. In addition to different degradation rates, distinct ratios of oxidized species (lactones, ketones, carboxylic acids, esters and aldehydes) are found depending on: a) the initial material (neat high density polyethylene or ethylene-co-undecenoic acid copolymer); b) the type of oxidation (thermo or photoinduced); and c) the absence or presence of a specific prodegradant additive. An important increase of crystallinity has been observed in the final oxidized samples, indicating that the extent of degradation is rather significant.


Item Type:Article
Uncontrolled Keywords:Undecenoic acid; Polyethylene; Oxidation processes; Prodegradant; FTIR; Crystallinity; Degradation; Esters; Ethylene; Hydrophilicity; Ketones; Macromolecules; Organometallics; Oxidation resistance; Polyethylenes Crystallinities; FTIR; Oxidation process; Prodegradant; Undecenoic acid
Subjects:Sciences > Chemistry > Crystallography
Sciences > Chemistry > Chemistry, Technical
Sciences > Chemistry > Chemistry, Organic
ID Code:29456
Deposited On:14 Apr 2015 10:49
Last Modified:01 Jan 2017 00:01

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