New trends in polylactide (PLA)-based materials: “Green” PLA-Calcium sulfate (nano)composites tailored with flame retardant properties |
| |
Authors: | Marius Murariu Paint Yoann Serge Bourbigot |
| |
Institution: | a Centre of Innovation and Research in Materials & Polymers (CIRMAP), Laboratory of Polymeric and Composite Materials (LPCM), University of Mons & Materia Nova Research Centre, Place du Parc 20, 7000 Mons, Belgium b Laboratoire Procédés d'Elaboration des Revêtements Fonctionnels (PERF), LSPES - UMR/CNRS 8008, Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Avenue Dimitri Mendeleïev - Bât. C7a, BP 90108, 59652 Villeneuve d'Ascq Cedex, France |
| |
Abstract: | Starting from gypsum, a by-product of lactic acid fabrication process, novel “green” composites have been produced by melt-blending polylactide (PLA) and this filler after a previous specific dehydration to obtain anhydrite II (AII). Such a material is potentially interesting in biodegradable/rigid packaging and in technical applications requiring rigidity, heat resistance and dimensional stability. In order to obtain PLA-AII composites characterized by specific end-use flame retardant properties, the addition of selected organo-modified layered silicates (OMLS) was considered. Co-addition of AII and OMLS leads to PLA (nano)composites characterized by good (nano)filler dispersion, thermal stability and adequate mechanical resistance. The flame retardant properties as shown by cone calorimetry showed significant increase in the ignition time compared to neat PLA and a substantial decrease, i.e., ca. 40%, of the maximum rate of heat release, whereas the UL94 HB test was successfully passed revealing non-dripping effect and extensive char formation. The study represents a new approach in formulating novel PLA grades with improved characteristic features. |
| |
Keywords: | Polylactide Calcium sulfate anhydrite Silicates (Nano)composites Clay Flame retardancy Thermo-mechanical properties |
本文献已被 ScienceDirect 等数据库收录! |
|