[en] 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.
Disciplines :
Chemistry
Author, co-author :
Marius, Murariu
Bonnaud, Leila
Yoann, Paint
Fontaine, Gaëlle
Bourbigot, Serge
Dubois, Philippe ; Université de Mons > Faculté des Sciences > Matériaux Polymères et Composites
Language :
English
Title :
New trends in polylactide (PLA)-based materials: 'Green' PLAeCalcium sulfate (nano)composites tailored with flame retardant properties
Publication date :
01 March 2010
Journal title :
Polymer Degradation and Stability
ISSN :
0141-3910
eISSN :
1873-2321
Publisher :
Elsevier, Netherlands
Volume :
95
Issue :
3
Pages :
374-381
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S816 - Matériaux Polymères et Composites
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Commentary :
Lecture en ligne: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TXS-4XS6FGC-6-F&_cdi=5598&_user=532054&_pii=S0141391009003826&_origin=search&_coverDate=03%2F31%2F2010&_sk=999049996&view=c&wchp=dGLbVlb-zSkzS&md5=944b30695b616f6ad23a4ff92cf87bc2
Publié en ligne le 23 novembre 2009