Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites
Authorized Users Only
2019
Authors
Tomić, MilošDunjić, Branko
Nikolić, Marija S.
![](/themes/MirageVinar/images/orcid.png)
Trifković, Kata
![](/themes/MirageVinar/images/orcid.png)
Stanković, Nadežda
![](/themes/MirageVinar/images/orcid.png)
Pavlović, Vladimir B.
![](/themes/MirageVinar/images/orcid.png)
Bajat, Jelena B.
![](/themes/MirageVinar/images/orcid.png)
Đonlagić, Jasna A.
Article (Published version)
![](/themes/MirageVinar//images/creativecommons/arr.png)
© 2019 Elsevier B.V.
Metadata
Show full item recordAbstract
In the present study the commercial multifunctional fatty acid polyamidoamine (PAA) was for the first time simultaneously applied as a curing agent and clay modifier for epoxy/clay nanocomposites (NC) based on diglycidyl ether of bisphenol A. The montmorillonite (Cloisite®Na + ) was modified with different quantities of partially and fully protonated polyamidoamine. The NCs with 0.5 wt% novel organoclay were prepared by solution intercalation method. The major aims of this paper are investigations of the effects of the composition of PAA modified clays on structure, mechanical, barrier properties and corrosion stability on steel substrates of NCs were studied. The thermogravimetric, flame photometry and X-ray diffraction analyses confirmed the efficient modification of clay surface with polyamidoamine, predominantly located within layers. The NCs exhibited an intercalated/exfoliated morphology and the presence of free amino groups and increased content of modifier facilitated dispersio...n of clay particles within the polymer matrix, as shown by electron microscopy techniques (SEM, TEM). Under an optimized loading of PAA (molar quantity of total amino groups per clay cation exchange capacity of 1.75), the layers in stacks were separated by 5.0 nm and high number of individual layers was present in NC. Clay modified by PAA with free amino groups showed increased storage modulus in the rubbery state, glass transition temperature of NCs, while dumping factor was decreased. The tensile test confirmed that introduction of flexible modifier on the epoxy/clay interface lead to increase in the ultimate tensile strenght and elongation at break by 31% and toughness up to 83%. The electrochemical impedance spectroscopy and permeability tests proved the pronounced barrier effect of clay particles against corrosive species and water vapor when high dispersion degree of clay in NC was achieved. © 2019 Elsevier B.V.
Keywords:
Polyamidoamine / Clay / Modification / Epoxy resin / CorrosionSource:
Progress in Organic Coatings, 2019, 131, 311-321Funding / projects:
- Synthesis and characterization of novel functional polymers and polymeric nanocomposites (RS-MESTD-Basic Research (BR or ON)-172062)
- Directed synthesis, structure and properties of multifunctional materials (RS-MESTD-Basic Research (BR or ON)-172057)
- Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45012)
- Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45019)
DOI: 10.1016/j.porgcoat.2019.02.037
ISSN: 0300-9440
WoS: 000466453100035
Scopus: 2-s2.0-85062222822
URI
https://linkinghub.elsevier.com/retrieve/pii/S0300944018312487https://vinar.vin.bg.ac.rs/handle/123456789/8076
Collections
Institution/Community
VinčaTY - JOUR AU - Tomić, Miloš AU - Dunjić, Branko AU - Nikolić, Marija S. AU - Trifković, Kata AU - Stanković, Nadežda AU - Pavlović, Vladimir B. AU - Bajat, Jelena B. AU - Đonlagić, Jasna A. PY - 2019 UR - https://linkinghub.elsevier.com/retrieve/pii/S0300944018312487 UR - https://vinar.vin.bg.ac.rs/handle/123456789/8076 AB - In the present study the commercial multifunctional fatty acid polyamidoamine (PAA) was for the first time simultaneously applied as a curing agent and clay modifier for epoxy/clay nanocomposites (NC) based on diglycidyl ether of bisphenol A. The montmorillonite (Cloisite®Na + ) was modified with different quantities of partially and fully protonated polyamidoamine. The NCs with 0.5 wt% novel organoclay were prepared by solution intercalation method. The major aims of this paper are investigations of the effects of the composition of PAA modified clays on structure, mechanical, barrier properties and corrosion stability on steel substrates of NCs were studied. The thermogravimetric, flame photometry and X-ray diffraction analyses confirmed the efficient modification of clay surface with polyamidoamine, predominantly located within layers. The NCs exhibited an intercalated/exfoliated morphology and the presence of free amino groups and increased content of modifier facilitated dispersion of clay particles within the polymer matrix, as shown by electron microscopy techniques (SEM, TEM). Under an optimized loading of PAA (molar quantity of total amino groups per clay cation exchange capacity of 1.75), the layers in stacks were separated by 5.0 nm and high number of individual layers was present in NC. Clay modified by PAA with free amino groups showed increased storage modulus in the rubbery state, glass transition temperature of NCs, while dumping factor was decreased. The tensile test confirmed that introduction of flexible modifier on the epoxy/clay interface lead to increase in the ultimate tensile strenght and elongation at break by 31% and toughness up to 83%. The electrochemical impedance spectroscopy and permeability tests proved the pronounced barrier effect of clay particles against corrosive species and water vapor when high dispersion degree of clay in NC was achieved. © 2019 Elsevier B.V. T2 - Progress in Organic Coatings T1 - Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites VL - 131 SP - 311 EP - 321 DO - 10.1016/j.porgcoat.2019.02.037 ER -
@article{ author = "Tomić, Miloš and Dunjić, Branko and Nikolić, Marija S. and Trifković, Kata and Stanković, Nadežda and Pavlović, Vladimir B. and Bajat, Jelena B. and Đonlagić, Jasna A.", year = "2019", abstract = "In the present study the commercial multifunctional fatty acid polyamidoamine (PAA) was for the first time simultaneously applied as a curing agent and clay modifier for epoxy/clay nanocomposites (NC) based on diglycidyl ether of bisphenol A. The montmorillonite (Cloisite®Na + ) was modified with different quantities of partially and fully protonated polyamidoamine. The NCs with 0.5 wt% novel organoclay were prepared by solution intercalation method. The major aims of this paper are investigations of the effects of the composition of PAA modified clays on structure, mechanical, barrier properties and corrosion stability on steel substrates of NCs were studied. The thermogravimetric, flame photometry and X-ray diffraction analyses confirmed the efficient modification of clay surface with polyamidoamine, predominantly located within layers. The NCs exhibited an intercalated/exfoliated morphology and the presence of free amino groups and increased content of modifier facilitated dispersion of clay particles within the polymer matrix, as shown by electron microscopy techniques (SEM, TEM). Under an optimized loading of PAA (molar quantity of total amino groups per clay cation exchange capacity of 1.75), the layers in stacks were separated by 5.0 nm and high number of individual layers was present in NC. Clay modified by PAA with free amino groups showed increased storage modulus in the rubbery state, glass transition temperature of NCs, while dumping factor was decreased. The tensile test confirmed that introduction of flexible modifier on the epoxy/clay interface lead to increase in the ultimate tensile strenght and elongation at break by 31% and toughness up to 83%. The electrochemical impedance spectroscopy and permeability tests proved the pronounced barrier effect of clay particles against corrosive species and water vapor when high dispersion degree of clay in NC was achieved. © 2019 Elsevier B.V.", journal = "Progress in Organic Coatings", title = "Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites", volume = "131", pages = "311-321", doi = "10.1016/j.porgcoat.2019.02.037" }
Tomić, M., Dunjić, B., Nikolić, M. S., Trifković, K., Stanković, N., Pavlović, V. B., Bajat, J. B.,& Đonlagić, J. A.. (2019). Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites. in Progress in Organic Coatings, 131, 311-321. https://doi.org/10.1016/j.porgcoat.2019.02.037
Tomić M, Dunjić B, Nikolić MS, Trifković K, Stanković N, Pavlović VB, Bajat JB, Đonlagić JA. Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites. in Progress in Organic Coatings. 2019;131:311-321. doi:10.1016/j.porgcoat.2019.02.037 .
Tomić, Miloš, Dunjić, Branko, Nikolić, Marija S., Trifković, Kata, Stanković, Nadežda, Pavlović, Vladimir B., Bajat, Jelena B., Đonlagić, Jasna A., "Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites" in Progress in Organic Coatings, 131 (2019):311-321, https://doi.org/10.1016/j.porgcoat.2019.02.037 . .