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Reaction Mechanism and Mechanical Property Improvement of Poly(Lactic Acid) Reactive Blending with Epoxy Resin
- Source :
- Polymers, Polymers, Vol 13, Iss 2429, p 2429 (2021)
- Publication Year :
- 2021
-
Abstract
- Polylactic acid (PLA) was melt-blended with epoxy resin to study the effects of the reaction on the mechanical and thermal properties of the PLA. The addition of 0.5% (wt/wt) epoxy to PLA increased the maximum tensile strength of PLA (57.5 MPa) to 67 MPa, whereas the 20% epoxy improved the elongation at break to 12%, due to crosslinking caused by the epoxy reaction. The morphology of the PLA/epoxy blends showed epoxy nanoparticle dispersion in the PLA matrix that presented a smooth fracture surface with a high epoxy content. The glass transition temperature of PLA decreased with an increasing epoxy content owing to the partial miscibility between PLA and the epoxy resin. The Vicat softening temperature of the PLA was 59 °C and increased to 64.6 °C for 0.5% epoxy. NMR confirmed the reaction between the -COOH groups of PLA and the epoxy groups of the epoxy resin. This reaction, and partial miscibility of the PLA/epoxy blend, improved the interfacial crosslinking, morphology, thermal properties, and mechanical properties of the blends.
- Subjects :
- Reaction mechanism
Toughness
Materials science
Polymers and Plastics
Organic chemistry
reaction
02 engineering and technology
010402 general chemistry
01 natural sciences
Miscibility
chemistry.chemical_compound
QD241-441
Polylactic acid
Ultimate tensile strength
Vicat softening point
Communication
thermal properties
toughness
General Chemistry
Epoxy
021001 nanoscience & nanotechnology
0104 chemical sciences
Chemical engineering
chemistry
visual_art
visual_art.visual_art_medium
0210 nano-technology
Glass transition
interfacial crosslink
Subjects
Details
- ISSN :
- 20734360
- Volume :
- 13
- Issue :
- 15
- Database :
- OpenAIRE
- Journal :
- Polymers
- Accession number :
- edsair.doi.dedup.....8953cbcbba5f46e51de1c5982359a02c