Effect of clay mineral on the accelerated hydrolytic degradation of polylactide in the polymer/clay nanocomposites
PBN-AR
Instytucja
Wydział Inżynierii Materiałowej i Ceramiki (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Materials Letters
ISSN
0167-577X
EISSN
1873-4979
Wydawca
Elsevier Science BV
Rok publikacji
2015
Numer zeszytu
Strony od-do
73--76
Numer tomu
146
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.28
Autorzy
Pozostali autorzy
+ 1
Słowa kluczowe
EN
nanocomposites
nanoparticles
thermal properties
polymeric composites
hydrolytic degradation
Streszczenia
Język
EN
Treść
Although the degradation of polylactide has been relatively well understood, there is still a lack of reliable data on the behavior of its composites at specific temperatures. This paper studies the hydrolytic degradability of polylactide/not activated smectite clay nanocomposites in the 6 weeks accelerated degradation at 80 °C which has not been widely documented so far. The composites with 3 wt%, 5 wt% and 10 wt% of smectite filler content obtained by injection molding were investigated and compared to the neat polylactide matrix material. The results of degradation at 80 °C were referred to the hydrolytic degradation at 25 °C and 37 °C. Macroscopic changes in the nanocomposites, their molecular weight and pH of medium was monitored during the degradation time. The influence of clay addition on the crystallization, glass transition and the melting temperature was also studied by differential scanning calorimetry (DSC). The DSC results show that the presence of smectite clay results in a shift of the onset peak for the melting temperatures towards higher values while for the glass transition towards the lower ones. A significant difference in degradation rate between the polylactide matrix and the polylactide/clay nanocomposites was also noted. The shortened degradation time of the nanocomposites increases their potential for use in biomedical applications, but also in disposable thermoplastic products which are increasingly used. © 2015 Elsevier B.V. All rights reserved.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:087966
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