Poly I-lactide-layered double hydroxide nanocomposites via in situ polymerization of I-lactide

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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Poly I-lactide-layered double hydroxide nanocomposites via in situ polymerization of I-lactide. / Katiyar, Vimal; Gerds, N.; Koch, C.B.; Risbo, J.; Hansen, H.C.B.; Plackett, David.

In: Polymer Degradation and Stability, Vol. 95, No. 12, 2010, p. 2563-2573.

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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Katiyar, Vimal; Gerds, N.; Koch, C.B.; Risbo, J.; Hansen, H.C.B.; Plackett, David / Poly I-lactide-layered double hydroxide nanocomposites via in situ polymerization of I-lactide.

In: Polymer Degradation and Stability, Vol. 95, No. 12, 2010, p. 2563-2573.

Publication: Research - peer-reviewJournal article – Annual report year: 2010

Bibtex

@article{345090c0d6aa4995b9cb65ecf869204f,
title = "Poly I-lactide-layered double hydroxide nanocomposites via in situ polymerization of I-lactide",
publisher = "Elsevier Ltd.",
author = "Vimal Katiyar and N. Gerds and C.B. Koch and J. Risbo and H.C.B. Hansen and David Plackett",
year = "2010",
doi = "10.1016/j.polymdegradstab.2010.07.031",
volume = "95",
number = "12",
pages = "2563--2573",
journal = "Polymer Degradation and Stability",
issn = "0141-3910",

}

RIS

TY - JOUR

T1 - Poly I-lactide-layered double hydroxide nanocomposites via in situ polymerization of I-lactide

A1 - Katiyar,Vimal

A1 - Gerds,N.

A1 - Koch,C.B.

A1 - Risbo,J.

A1 - Hansen,H.C.B.

A1 - Plackett,David

AU - Katiyar,Vimal

AU - Gerds,N.

AU - Koch,C.B.

AU - Risbo,J.

AU - Hansen,H.C.B.

AU - Plackett,David

PB - Elsevier Ltd.

PY - 2010

Y1 - 2010

N2 - The use of clay nanofillers offers a potential route to improved barrier properties in polylactide films. Magnesium–aluminium layered double hydroxides (LDHs) are interesting in this respect and we therefore explored synthesis of PLA-LDH nanocomposites by ring-opening polymerization. This method is attractive because it should ensure good dispersion of LDH in the polymer. The effect of adding either LDH carbonate (LDH-CO3) or laurate-modified LDH (LDH-C12) was investigated. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy revealed that exfoliated nanocomposites were obtained when using LDH-C12 but that LDH-CO3 gave a partly phase-separated morphology. Thermogravimetric analysis showed that PLA-LDH combinations exhibited higher degradation onset temperatures and differential scanning calorimetry confirmed that LDHs can act as nucleating agents. However, PLA molecular weight was significantly reduced when in-situ polymerization was conducted in the presence of the LDHs and we suggest that chain termination via LDH surface hydroxyl groups and/or metal-catalyzed degradation could be responsible.

AB - The use of clay nanofillers offers a potential route to improved barrier properties in polylactide films. Magnesium–aluminium layered double hydroxides (LDHs) are interesting in this respect and we therefore explored synthesis of PLA-LDH nanocomposites by ring-opening polymerization. This method is attractive because it should ensure good dispersion of LDH in the polymer. The effect of adding either LDH carbonate (LDH-CO3) or laurate-modified LDH (LDH-C12) was investigated. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy revealed that exfoliated nanocomposites were obtained when using LDH-C12 but that LDH-CO3 gave a partly phase-separated morphology. Thermogravimetric analysis showed that PLA-LDH combinations exhibited higher degradation onset temperatures and differential scanning calorimetry confirmed that LDHs can act as nucleating agents. However, PLA molecular weight was significantly reduced when in-situ polymerization was conducted in the presence of the LDHs and we suggest that chain termination via LDH surface hydroxyl groups and/or metal-catalyzed degradation could be responsible.

KW - Biopolymers

KW - Solar energy

KW - Biopolymerer

KW - Solenergi

U2 - 10.1016/j.polymdegradstab.2010.07.031

DO - 10.1016/j.polymdegradstab.2010.07.031

JO - Polymer Degradation and Stability

JF - Polymer Degradation and Stability

SN - 0141-3910

IS - 12

VL - 95

SP - 2563

EP - 2573

ER -