Synthesis and characterization of APTMS/melamine cured hyperbranched polyester-epoxy hybrid coatings

Allauddin, Shaik; Chandran, M.; Jena, Kishore K.; Narayan, Ramanuj; Raju, K. Mohana

doi:10.1016/j.porgcoat.2013.04.015

Cited by 21 publications

(8 citation statements)

References 28 publications

(26 reference statements)

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“…Moreover, the unique globular structures can reduce the shrinkage of some thermosetting polymers, especially epoxy resins, due to the compact architecture stretching when their terminal groups interact with other functional groups of polymer matrix . Because of these favorable characteristics, hyperbranched polymers are widely used as modifiers for epoxy resins . However, the introduction of HBPs into epoxy composites may affect several mechanical properties, such as tensile strength and modulus, stiffness, and flexural strength and modulus owing to the introduction of flexible chains, which are contained in the architecture of HBPs .…”

Section: Introductionmentioning

confidence: 99%

Synergetic reinforcements of epoxy composites with glass fibers and hyperbranched polymers

Cui

et al. 2017

Polymer Composites

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Glass fibers (GFs) and hyperbranched polymers with amino terminal groups (HBPA) were introduced into epoxy/ polyamide system to fabricate high-performance composites. The impact resistance and mechanical characterization of epoxy/HBPA/GFs composites was performed to investigate the effect of GFs in the composites. The composites revealed noticeable improvement in tensile strength, elongation at break, flexural strength as well as impact resistance in comparison with the unmodified and HBPA modified epoxy/polyamide thermosets. FESEM morphologies showed that the toughening mechanisms could be attributed to the yielding deformation, phase separation and micro-crack toughening mechanisms. POLYM. COMPOS., 00:000-000,

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Section: Introductionmentioning

confidence: 99%

Synergetic reinforcements of epoxy composites with glass fibers and hyperbranched polymers

Cui

et al. 2017

Polymer Composites

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“…Since the use of coupling agents is highly advisable, the preparation of multifunctional coupling agents by silylation of the final groups of HBPs can be greatly advantageous to improve epoxy resins by the generation of silica particles by the sol-gel process from the alkoxysilanes at the end groups of the hyperbranched structures [67]. As an alternative, the use of epoxy-terminated HBP as an epoxy component has also been proposed [203].…”

Section: Ethoxysilylation Of Hyperbranched Pei and The Use In The Prementioning

confidence: 99%

Improved epoxy thermosets by the use of poly(ethyleneimine) derivatives

Acebo

Ramis

Serra

2017

Physical Sciences Reviews

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Epoxy resins are commonly used as thermosetting materials due to their excellent mechanical properties, high adhesion to many substrates and good heat and chemical resistances. This type of thermosets is intensively used in a wide range of fields, where they act as fiber-reinforced materials, general-purpose adhesives, high-performance coatings and encapsulating materials. These materials are formed by the chemical reaction of multifunctional epoxy monomers forming a polymer network produced through an irreversible way. In this article the improvement of the characteristics of epoxy thermosets using different hyperbranched poly(ethyleneimine) (PEI) derivatives will be explained.Postprint (published version

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“…Figure 2 shows the TEM microphotographs of some of the hybrids materials prepared. An alternative use of HBPs in hybrid epoxy thermosets was proposed, using an epoxy-terminated hyperbranched polyester as the epoxy component [81]. Hybrid epoxy thermosets were prepared by reaction of the epoxy-HBP with APTMS and curing with anhydrides.…”

Section: Epoxy Hybrids By Using Hyperbranched Polymersmentioning

confidence: 99%

Epoxy Sol-Gel Hybrid Thermosets

2016

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Sol-gel methodologies are advantageous in the preparation of hybrid materials in front of the conventional addition of nanoparticles, because of the fine dispersion of the inorganic phase that can be reached in epoxy matrices. In addition, the use of organoalkoxysilanes as coupling agents allows covalent linkage between organic and inorganic phases, which is the key point in the improvement of mechanical properties. The sol-gel process involves hydrolysis and condensation reactions under mild conditions, starting from hydrolysable metal alkoxides, generally alkoxy silanes. Using the sol-gel procedure, the viscosity of the formulation is maintained, which is an important issue in coating applications, whereas the transparency of the polymer matrix is also maintained. However, only the proper combination of the chemistries and functionalities of both organic and inorganic structures leads to thermosets with the desired characteristics. The adequate preparation of hybrid epoxy thermosets enables their improvement in characteristics such as mechanical properties (modulus, hardness, scratch resistance), thermal and flame resistance, corrosion and antimicrobial protection, and even optical performance among others.

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Synthesis and characterization of APTMS/melamine cured hyperbranched polyester-epoxy hybrid coatings

Cited by 21 publications

References 28 publications

Synergetic reinforcements of epoxy composites with glass fibers and hyperbranched polymers

Synergetic reinforcements of epoxy composites with glass fibers and hyperbranched polymers

Improved epoxy thermosets by the use of poly(ethyleneimine) derivatives

Epoxy Sol-Gel Hybrid Thermosets

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