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Heat‐Resistant Fully Bio‐Based Nanocomposite Blends Based on Poly(lactic acid)
Author(s) -
Nuzzo Anna,
Coiai Serena,
Carroccio Sabrina C.,
Dintcheva Nadka Tz.,
Gambarotti Cristian,
Filippone Giovanni
Publication year - 2014
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201300051
Subject(s) - materials science , nanocomposite , polyamide , lactic acid , glass transition , composite material , organoclay , microstructure , drop (telecommunication) , phase (matter) , polymer , genetics , bacteria , biology , telecommunications , chemistry , organic chemistry , computer science
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 (70 wt%). 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.