One-step synthesized azo-dye modified Mg-Al LDH reinforced biobased semi-aromatic polyamide containing naphthalene ring; study on thermal stability and optical properties

Hajibeygi, Mohsen; Omidi-Ghallemohamadi, Mehrdad

doi:10.1007/s10965-017-1212-9

Cited by 15 publications

(9 citation statements)

References 46 publications

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“…However, studies into the effects of organic-inorganic pigments on the performance of polymer composites have still been rather limited, especially regarding elastomeric matrices. Hajibeygi et al [28] investigated the influence of organo-azo dye-modified aluminum-magnesium hydroxycarbonates on the thermal and optical properties of biobased semi-aromatic polyamide. Well-dispersed modified aluminum-magnesium hydroxycarbonates were found to be an efficient modifier for polyamide.…”

Section: Introductionmentioning

confidence: 99%

Aluminum-Magnesium Hydroxycarbonate/Azo Dye Hybrids as Novel Multifunctional Colorants for Elastomer Composites

et al. 2018

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This study presents the preparation and characterization of new organic-inorganic pigments based on aluminum-magnesium hydroxycarbonate (LH) and azo dyes. Solvent resistance studies, XRD, SEM, and TGA confirmed the successful formation of hybrid pigments, which were characterized in terms of their physicochemical properties. The new hybrid pigments were applied in acrylonitrile-butadiene (NBR) and ethylene-propylene (EPM) rubber composites and cured with sulfur and peroxide curing systems, respectively. The mechanical properties, dispersion quality, and flame-retardant properties of the NBR/hybrid and EPM/hybrid pigment composites were determined by dynamic mechanical analysis (DMA), SEM, and microscale combustion calorimetry (MCC). Complex experimental investigations revealed that the layered nature of hybrid pigments could improve the barrier ability and flame retardancy of elastomer composites. In comparison to unmodified aluminum-magnesium hydroxycarbonate, the modified LH dye structures contributed to significantly decrease the heat release rate and the total heat release of the NBR and EPM composites, offering a new approach to imparting low flammability to elastomer materials.

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Section: Introductionmentioning

confidence: 99%

Aluminum-Magnesium Hydroxycarbonate/Azo Dye Hybrids as Novel Multifunctional Colorants for Elastomer Composites

et al. 2018

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“…The decrease in mobility of PAI chain in presence of LDH layers improved the thermal stability of the resulted nanocomposites . Also, due to presence of abundant surface hydroxyl groups in the LDH structure and high intermolecular interactions between functional groups of PAI such as amine, sulfone, carboxyl and hydroxyl group of LDH, thermal properties were improved in nanocomposites as compared to pure PAI .…”

Section: Characterization Of the Pai/ldh Nanocomposites (Painc)mentioning

confidence: 98%

Preparation and characterization of poly(amide‐imide)/Mg‐Al LDH nanocomposites; effect of organo‐modified LDH on thermal properties and morphology

Hajibeygi

Omidi-Ghallemohamadi

2017

Polymer Composites

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New poly(amide‐imide) Mg‐Al/layered double hydroxide (LDH) nanocomposites (PAINC) were prepared from synthesized poly(amide‐imide) (PAI) containing sulfone and ether linkages with two new organo modified Mg‐Al LDH (OLDH) by solution intercalation technique. OLDH were prepared from two different organo modifier with and without imide heterocyclic structure by one step method. The results of X‐ray diffraction (XRD), field emission‐scanning electron microscopy (FE‐SEM) and transmission electron microscopy (TEM) showed uniform distribution for LDH sheets in the PAI matrix. Thermal properties of all the samples were studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The thermal properties results showed that by OLDH loading in PAI matrix the thermal stabilities were increased. The temperature at 5% mass loss (T5) was increased from 225°C to 300°C for PAINC containing 5 mass% of OLDH containing imide hetrocyclic rings. The theoretical study indicated that the d‐value of OLDH has been related to structure of its organo‐modifier. POLYM. COMPOS., 39:E1669–E1681, 2018. © 2017 Society of Plastics Engineers

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“…Although particular attention is paid to the bio-based polyamide composites with natural or cellulose fibers or mixtures of those natural fillers with glass or carbon fibers, there are also reports on biopolyamides composites reinforced by carbon fibers, boron nitride microparticles, composites containing nutshell powder modified with nanosilver particles or rice husk and nanoclay [92][93][94][95]. For instance, Hajibeygi and Omidi-Ghallemohamadi have synthesized a semi-aromatic bio-based polyamide via triphenyl phosphite-activated polycondensation reaction and prepared Mg-Al layered double hydroxide containing composites with enhanced thermal stability [96]. There are also some investigations of thermal stability and flammability of polyamide 11 composites with lignins or nanoboehmite, which causes the increase in thermal stability and reduction of heat release and mass loss rate [97,98].…”

Section: Biopolyamides Reinforced By Other Additivesmentioning

confidence: 99%

Modern biopolyamide-based materials: synthesis and modification

2019

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The wider use of renewable feedstock in structural applications, where high mechanical performance is required, can be achieved by the application of recently developed engineering biopolymers and their further modification by micro-and nanoparticles. In this review, we present the current state of the art of biopolyamide materials for structural and functional applications. The overview includes all stages of the manufacturing-from the synthesis of building blocks, through the synthesis of polymers and its physical modification, with special emphasis on the properties of the obtained engineering biocomposites as a final product of modern polymer technology. In the first part, the synthetic routes of bio-derived counterparts of common polyamides as well as specialty polymers with functional properties arising from the complex structure of biochemicals were exemplified. The development of environmentally friendly composites and nanocomposites based on biopolyamides and natural fillers, such as plant fibers or cellulosic nanofibers, was of particular interest due to preserved sustainable character of such materials.

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One-step synthesized azo-dye modified Mg-Al LDH reinforced biobased semi-aromatic polyamide containing naphthalene ring; study on thermal stability and optical properties

Cited by 15 publications

References 46 publications

Aluminum-Magnesium Hydroxycarbonate/Azo Dye Hybrids as Novel Multifunctional Colorants for Elastomer Composites

Aluminum-Magnesium Hydroxycarbonate/Azo Dye Hybrids as Novel Multifunctional Colorants for Elastomer Composites

Preparation and characterization of poly(amide‐imide)/Mg‐Al LDH nanocomposites; effect of organo‐modified LDH on thermal properties and morphology

Modern biopolyamide-based materials: synthesis and modification

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