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MMT and LDH organo-modification with surfactants tailored for PLA nanocomposites
- Source :
- eXPRESS Polymer Letters, Vol 11, Iss 3, Pp 163-175 (2017), Express polymer letters 11 (2017): 163–175. doi:10.3144/expresspolymlett.2017.18, info:cnr-pdr/source/autori:Coiai S.; Cicogna F.; de Santi A.; Perez Amaro L.; Spiniello R.; Signori F.; Fiori S.; Oberhauser W.; Passaglia E./titolo:MMT and LDH organo-modification with surfactants tailored for PLA nanocomposites/doi:10.3144%2Fexpresspolymlett.2017.18/rivista:Express polymer letters/anno:2017/pagina_da:163/pagina_a:175/intervallo_pagine:163–175/volume:11
- Publication Year :
- 2017
- Publisher :
- Budapest University of Technology, 2017.
-
Abstract
- Low molecular weight polyesters were end-functionalized with ammonium and carboxylate salts and used in ionic exchange reactions with respectively cationic (MMT) and anionic (LDH) clays. The hybrid organic-inorganic substrates were structurally analysed to determine the ester oligomers’ modification degree and their thermal behaviour owing to confinement effects. The dispersion of such hybrids in polylactic acid (PLA) matrix was performed and the ultimate structural, morphological and thermal properties of the collected nanocomposites were investigated and correlated to the tailored interfacial properties with the different inorganic substrates. While the composites with MMT proved to be stable under thermo-oxidative conditions, the samples obtained by dispersing the LDH hybrid suffered from poor final thermostability owing to molecular weights decrease. Deeper insights about the effect of the interactions at interface (polymer chain-surfactant and polymer chain- inorganic surface) evidenced that by promoting an intimate contact between PLA chains and LDH surface (through oligoester used as inorganic substrate modifier) a certain extent of PLA hydrolysis triggered by both surfactant and inorganic surface (LDH) occurred and cannot completely avoided.
- Subjects :
- Nanocomposite
Materials science
Polymers and Plastics
LDH
General Chemical Engineering
Organic Chemistry
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
lcsh:Chemical technology
01 natural sciences
0104 chemical sciences
Nanocomposites
MMT
Chemical engineering
Materials Chemistry
lcsh:TA401-492
PLA
lcsh:Materials of engineering and construction. Mechanics of materials
lcsh:TP1-1185
tailor-made polymer
Physical and Theoretical Chemistry
0210 nano-technology
Subjects
Details
- Language :
- English
- Volume :
- 11
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- eXPRESS Polymer Letters
- Accession number :
- edsair.doi.dedup.....593a9b3d57af28c961ac99a5bb578986