Combustion Behavior and Thermal Degradation Properties of Wood Impregnated with Intumescent Biomass Flame Retardants: Phytic Acid, Hydrolyzed Collagen, and Glycerol

Durable phosphorus-based flame retardants were applied to twill fabrics con taining cotton and wool to study the effect of wool on the flame retardancy and physical properties of the blend fabrics. The presence of wool in untreated blend fabrics caused burning rates to decrease and oxygen index values to increase as wool content increased in the blends. These effects were also observed in cotton/ wool blends treated with low levels of the Thps-urea-TMM flame retardant, but were less pronounced in fabrics treated at high levels. Thermogravimetric analyses were conducted to study the thermal degradation of the treated and untreated fabrics. The presence of wool in treated blend fabrics did not sig nificantly change strength retention, area shrinkage and wrinkle recovery values in comparison to similarly treated 100% cotton fabrics.

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Thermal Degradation Characteristic and Flame Retardancy of Polylactide-Based Nanobiocomposites

Molecules ◽

10.3390/molecules23102648 ◽

2018 ◽

Vol 23 (10) ◽

pp. 2648 ◽

Cited By ~ 8

Author(s):

Kuruma Malkappa ◽

Jayita Bandyopadhyay ◽

Suprakas Ray

Keyword(s):

Thermal Degradation ◽

Flame Retardancy ◽

High Performance ◽

Flame Retardants ◽

Degradable Polymers ◽

Melt Blending ◽

Degradation Characteristic ◽

Sustainable Materials ◽

Fire Properties ◽

Intumescent Flame Retardants

Polylactide (PLA) is one of the most widely used organic bio-degradable polymers. However, it has poor flame retardancy characteristics. To address this disadvantage, we performed melt-blending of PLA with intumescent flame retardants (IFRs; melamine phosphate and pentaerythritol) in the presence of organically modified montmorillonite (OMMT), which resulted in nanobiocomposites with excellent intumescent char formation and improved flame retardant characteristics. Triphenyl benzyl phosphonium (OMMT-1)- and tributyl hexadecyl phosphonium (OMMT-2)-modified MMTs were used in this study. Thermogravimetric analysis in combination with Fourier transform infrared spectroscopy showed that these nanocomposites release a smaller amount of toxic gases during thermal degradation than unmodified PLA. Melt-rheological behaviors supported the conclusions drawn from the cone calorimeter data and char structure of the various nanobiocomposites. Moreover, the characteristic of the surfactant used for the modification of MMT played a crucial role in controlling the fire properties of the composites. For example, the nanocomposite containing 5 wt.% OMMT-1 showed significantly improved fire properties with a 47% and 68% decrease in peak heat and total heat release rates, respectively, as compared with those of unmodified PLA. In summary, melt-blending of PLA, IFR, and OMMT has potential in the development of high-performance PLA-based sustainable materials.

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Multi-Functional Methacrylates Bearing Thermal Degradation Properties-Synthesis, Photo- and Thermal Curing, and Thermolysis-

Journal of Photopolymer Science and Technology ◽

10.2494/photopolymer.18.199 ◽

2005 ◽

Vol 18 (2) ◽

pp. 199-202 ◽

Cited By ~ 10

Author(s):

Masamitsu Shirai ◽

Kazuyuki Mitsukura ◽

Haruyuki Okamura ◽

Masahiro Miyasaka

Keyword(s):

Thermal Degradation ◽

Thermal Curing ◽

Degradation Properties

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Self-Extinguishing and Non-Drip Flame Retardant Polyamide 6 Nanocomposite: Mechanical, Thermal, and Combustion Behavior

Flame Retardancy and Thermal Stability of Materials ◽

10.1515/flret-2018-0001 ◽

2018 ◽

Vol 1 (1) ◽

pp. 1-13 ◽

Cited By ~ 3

Author(s):

Hao Wu ◽

Rogelio Ortiz ◽

Renan De Azevedo Correa ◽

Mourad Krifa ◽

Joseph H. Koo

Keyword(s):

Maleic Anhydride ◽

Flame Retardant ◽

Polymer Matrix ◽

Flame Retardants ◽

Polyamide 6 ◽

Twin Screw Extrusion ◽

Elongation At Break ◽

Combustion Behavior ◽

Screw Extrusion ◽

Twin Screw

AbstractIncorporation of flame-retardant (FR) additives and nanoclay fillers into thermoplastic polymers effectively suppresses materials flammability and melt dripping behavior. However, it largely affects other properties, such as toughness and ductility. In order to recover the lost toughness and ductility of flame retardant polyamide 6, various loadings of maleic anhydride modified SEBS elastomer were added and processed by twin screw extrusion. TEM images showed exfoliated nanoclay platelets and reveals that the clay platelets well dispersed in the polymer matrix. By balancing the ratio of flame retardants, nanoclay and elastomers, formulation with elongation at break as high as 76% was achieved. Combining conventional intumescent FR and nanoclay, UL-94 V-0 rating and the LOI value as high as 32.2 were achieved. In conclusion, effective self-extinguishing and non-drip polyamide 6 nanocomposite formulations with significant improvement in toughness and ductility were achieved.

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