Molecular stitches for enhanced recycling of packaging. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Science Année : 2017

Molecular stitches for enhanced recycling of packaging.

Résumé

Polymers made of even slightly different repeat units are usually immiscible and form materials with two separate phases, like oil and water. Not only do different polymers not mix, but the interfaces between them are very sharp and mechanically weak. This lack of interfacial strength poses a very serious challenge to the recycling of blends of different polymers and, notably, polyethylene (PE) and isotactic polypropylene (iPP), the two polymers most commonly found in the industrial and domestic waste that come from packaging. If these two tough polymers are simply blended together, the resulting material is brittle and cannot be used. On page 814 of this issue, Eagan et al. (1) report that adding just 1% of a suitable block copolymer—a chain of PE connected to a chain of iPP—can create molecular stitches between the two phases and make the resulting blend as tough as iPP and PE themselves.
Fichier non déposé

Dates et versions

hal-01584202 , version 1 (08-09-2017)

Identifiants

Citer

Costantino Creton. Molecular stitches for enhanced recycling of packaging.. Science, 2017, 355 (6327), pp.797-798. ⟨10.1126/science.aam5803⟩. ⟨hal-01584202⟩
120 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More