Poly(lactic acid) (PLA) is melt mixed with polyamide 11 (PA11) to obtain a heat-resistant fully bio-based blend with PLA as the dominant component. The goal is achieved by adding small amounts of organoclay (OMMT), which is used to manipulate the blend microstructure. The selective positioning of the OMMT inside the PA11 and at the PLA/PA11 interface turns the blend morphology from drop/matrix into co-continuous at high PLA content (70wt%). The OMMT-rich PA11 framework that interpenetrates the major PLA phase effectively contributes to bear stresses, and the nanocomposite blend keeps its structural integrity up to ≈160°C, i.e., about 100°C above the PLA glass transition.
Heat-resistant fully bio-based nanocomposite blends based on poly(lactic acid) / A., Nuzzo; S., Coiai; S., Carroccio; Dintcheva, N. T. Z.; C., Gambarotti; Filippone, Giovanni. - In: MACROMOLECULAR MATERIALS AND ENGINEERING. - ISSN 1439-2054. - 299:(2014), pp. 31-40. [10.1002/mame.201300051]
Heat-resistant fully bio-based nanocomposite blends based on poly(lactic acid)
FILIPPONE, GIOVANNI
2014
Abstract
Poly(lactic acid) (PLA) is melt mixed with polyamide 11 (PA11) to obtain a heat-resistant fully bio-based blend with PLA as the dominant component. The goal is achieved by adding small amounts of organoclay (OMMT), which is used to manipulate the blend microstructure. The selective positioning of the OMMT inside the PA11 and at the PLA/PA11 interface turns the blend morphology from drop/matrix into co-continuous at high PLA content (70wt%). The OMMT-rich PA11 framework that interpenetrates the major PLA phase effectively contributes to bear stresses, and the nanocomposite blend keeps its structural integrity up to ≈160°C, i.e., about 100°C above the PLA glass transition.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
