Novel nanocomposites consisting of a semi-crystalline polyamide and Mg–Al LDH: Morphology, thermal properties and flame retardancy

Shabanian, Meisam; Basaki, Nemat; Khonakdar, Hossein Ali; Jafari, Seyed Hassan; Hedayati, Kambiz; Wagenknecht, Udo

doi:10.1016/j.clay.2013.12.033

Cited by 58 publications

(44 citation statements)

References 41 publications

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“…Meanwhile, the generated char residue and mixed metal oxide can protect the bulk polymer from air exposure and suppress the release of smoke [26][27][28][29]. Therefore, LDH has attracted considerable attention as a flame retardant and thermal stabilizer [30][31][32][33][34][35][36][37][38]. In particular, Wang et al confirmed that MgAl LDH and CoAl LDH can efficiently improve the flame retardancy of PP [39,40].…”

Section: Introductionmentioning

confidence: 93%

Thermal Stability, Combustion Behavior, and Mechanical Property in a Flame-Retardant Polypropylene System

2017

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Abstract:In order to comprehensively improve the strength, toughness, flame retardancy, smoke suppression, and thermal stability of polypropylene (PP), layered double hydroxide (LDH) Ni 0.2 Mg 2.8 Al-LDH was synthesized by a coprecipitation method coupled with the microwave-hydrothermal treatment. The X-ray diffraction (XRD), morphology, mechanical, thermal, and fire properties for PP composites containing 1 wt %-20 wt % Ni 0.2 Mg 2.8 Al-LDH were investigated. The cone calorimeter tests confirm that the peak heat release rate (pk-HRR) of PP-20%LDH was decreased to 500 kW/m 2 from the 1057 kW/m 2 of PP. The pk-HRR, average mass loss rate (AMLR) and effective heat of combustion (EHC) analysis indicates that the condensed phase fire retardant mechanism of Ni 0.2 Mg 2.8 Al-LDH in the composites. The production rate and mean release yield of CO for composites gradually decrease as Ni 0.2 Mg 2.8 Al-LDH increases in the PP matrix. Thermal analysis indicates that the decomposition temperature for PP-5%LDH and PP-10%LDH is 34 • C higher than that of the pure PP. The mechanical tests reveal that the tensile strength of PP-1%LDH is 7.9 MPa higher than that of the pure PP. Furthermore, the elongation at break of PP-10%LDH is 361% higher than PP. In this work, the synthetic LDH Ni 0.2 Mg 2.8 Al-LDH can be used as a flame retardant, smoke suppressant, thermal stabilizer, reinforcing, and toughening agent of PP products.

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Section: Introductionmentioning

confidence: 93%

Thermal Stability, Combustion Behavior, and Mechanical Property in a Flame-Retardant Polypropylene System

2017

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“…1,2 However, the application of neat PA6 or PA66, two kinds of nylon, has been limited to some special fields due to its relatively low thermal conductivity. Therefore, PA is mostly compounded with other polymers [3][4][5] or rigid particles [6][7][8][9][10][11][12][13] to overcome these limitations. Graphene is an atomically thick, two-dimensional (2D) sheet composed of sp 2 carbon atoms arranged in a honeycomb structure.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties, morphology and thermal conductivity of polyamide composites filled with graphene nanoplatelets, Al₂O₃and graphite

Lin

Du³

et al. 2015

Materials Research Innovations

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In this work, PA6/PA66/GNP thermal composites were prepared via a melt blending method. Mechanical properties, morphology and thermal properties of PA6/PA66/GNP composites were investigated. The thermal conductivity of composite containing 50 wt-% of graphene nanoplatelets was measured as 5·03 W m -1 K -1 at 30°C. When the Al 2 O 3 was replaced for graphene nanoplatelets, the thermal conductivity of composites decreased, but the mechanical properties improved. The optimum amount of Al 2 O 3 which replaced graphene nanoplatelets is 10%. When graphite was used to replace for graphene nanoplatelets, thermal conductivity basically remained unchanged but mechanical properties decreased.

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“…The XRD patterns of PSNCs also indicate that FSNP does not exert any significant effects on the PESA structures. This means that the nanoparticles are either too small or very amorphous …”

Section: Resultsmentioning

confidence: 99%

Amide-acid functional SiO₂nanocomposites based on new semi-crystalline poly(ether-sulfone-amide): thermal, combustion and mechanical studies

2016

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New amide–acid functional SiO2 nanoparticle (FSNP)‐reinforced semi‐crystalline aliphatic–aromatic poly(ether‐sulfone‐amide) (PESA) was synthesized using a solution method in dimethylformamide. The surfaces of SiO2 nanoparticles were functionalized with phthalic anhydride, and subsequently PESA was synthesized using direct polymerization with good yield and desired molar mass. PESA/SiO2 nanocomposites (PSNCs) were prepared with three different contents of FSNP and the morphology and mechanical, thermal and combustion properties of the PSNCs were studied. The results of X‐ray diffraction, field‐emission scanning electron microscopy and transmission electron microscopy showed a uniform dispersion for FSNP in the PESA matrix. According to the results of mechanical tests, the tensile strength and the Young's modulus of PESA were enhanced by FSNP loading. Thermogravimetric analysis and derivative thermogravimetry results showed a substantial improvement in thermal properties of PESA. The temperature at 5% mass loss was increased from 371.7 to 395.8 °C for the PSNC containing 8 mass% of FSNP, as well as the char yield being enhanced greatly, which was about 30% higher than that of neat PESA. Significant improvements in combustion properties were observed for PSNCs from microscale combustion calorimetry. The peak heat release rate showed an obvious improvement and decreased by about 57% compared to that of neat PESA on 8 mass% loading of FSNP. © 2016 Society of Chemical Industry

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Novel nanocomposites consisting of a semi-crystalline polyamide and Mg–Al LDH: Morphology, thermal properties and flame retardancy

Cited by 58 publications

References 41 publications

Thermal Stability, Combustion Behavior, and Mechanical Property in a Flame-Retardant Polypropylene System

Thermal Stability, Combustion Behavior, and Mechanical Property in a Flame-Retardant Polypropylene System

Mechanical properties, morphology and thermal conductivity of polyamide composites filled with graphene nanoplatelets, Al₂O₃and graphite

Amide-acid functional SiO₂nanocomposites based on new semi-crystalline poly(ether-sulfone-amide): thermal, combustion and mechanical studies

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Novel nanocomposites consisting of a semi-crystalline polyamide and Mg–Al LDH: Morphology, thermal properties and flame retardancy

Cited by 58 publications

References 41 publications

Thermal Stability, Combustion Behavior, and Mechanical Property in a Flame-Retardant Polypropylene System

Thermal Stability, Combustion Behavior, and Mechanical Property in a Flame-Retardant Polypropylene System

Mechanical properties, morphology and thermal conductivity of polyamide composites filled with graphene nanoplatelets, Al2O3and graphite

Amide-acid functional SiO2nanocomposites based on new semi-crystalline poly(ether-sulfone-amide): thermal, combustion and mechanical studies

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Product

Resources

About

Mechanical properties, morphology and thermal conductivity of polyamide composites filled with graphene nanoplatelets, Al₂O₃and graphite

Amide-acid functional SiO₂nanocomposites based on new semi-crystalline poly(ether-sulfone-amide): thermal, combustion and mechanical studies