Effect of amine‐reactive elastomer on the properties of poly(lactic acid) films obtained by solvent‐cast 3D printing

Blends of poly(lactic acid) (PLA) and amine‐terminated butadiene‐acrylonitrile (ATBN) elastomer were prepared by solution with ATBN contents of 8–20 wt%. Films were molded by liquid deposition modeling 3D printing. Fourier transform infrared (FTIR) spectroscopy showed that the terminal carboxylic gr...

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Bibliographic Details
Published in:Polymer engineering and science 2022-10, Vol.62 (10), p.3088-3098
Main Authors: Oliveira, Lucas R. D., Nonato, Renato C., Bonse, Baltus C., Morales, Ana R.
Format: Article
Language:English
Subjects:
3D printing
ATBN
blends
Chain scission
Chains
Elastomers
Elongation
Fourier transforms
Hydrolysis
Phase separation
PLA
Polylactic acid
Polymer blends
Properties
telechelic elastomer
Thermal stability
Thermogravimetric analysis
Three dimensional models
Three dimensional printing
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Summary:Blends of poly(lactic acid) (PLA) and amine‐terminated butadiene‐acrylonitrile (ATBN) elastomer were prepared by solution with ATBN contents of 8–20 wt%. Films were molded by liquid deposition modeling 3D printing. Fourier transform infrared (FTIR) spectroscopy showed that the terminal carboxylic groups of the PLA chains reacted with the terminal amino groups of ATBN. Water was the byproduct of this reaction, causing PLA hydrolysis and accelerating the reaction. Thermogravimetric analysis (TGA) showed that components interaction caused a loss of PLA thermal stability. Scanning electron microscopy (SEM) of the blends revealed a porous morphology and no phase separation. There was change in the elongation when compared with neat PLA. Although the addition of a telechelic elastomer could improve PLA toughness, any benefits arising from such addition seem to be neutralized by PLA chain scission due to hydrolysis and porosity, resulting from the condensation reaction. Blends of PLA with reactive elastomer – ATBN produced by 3D printing.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.26086