Inorganic Polymers as Flame‐<scp>R</scp>etardant Materials

Mishra, Raghvendra Kumar; Eren, Tarık; Wang, De‐Yi

doi:10.1002/9783527819140.ch8

Cited by 7 publications

(6 citation statements)

References 93 publications

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“…Ferrocene has proved to enhance the features of the polymers to a great extent and has made them a pro table choice where materials are expected to show superior electroactivity, conductance and semiconductance, catalytic activity, optical properties, thermo-mechanical stability, magnetism and ameretarding behavior [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Ferrocene-Based Polyamides and Their Organic Analogues Terpolyamides: Influence of Aliphatic and Aromatic Sequences on Physico-Chemical Characteristics

Khan

Akhter

Gul

et al. 2022

J Inorg Organomet Polym

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Efforts have been devoted to synthesize and characterize processable polymers with desired properties.Herein, four different series of aromatic and aliphatic terpolyamides were prepared via solution phase polycondensation of 4,4'-oxydianiline and hexamethylenediamine (HMDA) with various diacids chlorides (isophthalyol dichloride, terepthalyol dichloride, 1, 1'-ferrocene dicarboxylic acid chloride and transazobenzene-4, 4'-dicarbonyl chloride). The structural, morphological and physico-chemical nature of as prepared polymers was explored by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermal analysis (TGA and DSC), and wide-angle x-ray diffraction (WAXRD). Moreover, an aliphatic diamine was incorporated in varying concentration as a exible methylene spacer and the effect of its concentration on the properties of polyamides was also studied. Changes in various physicochemical properties such as solubility, inherent viscosity, surface morphology and ame retarding behaviour were investigated. Marked difference in morphology and solubility was observed with the change in the ratio of segments in the chain. Inherent viscosities of polymers ranged from 1.8052-1.6274 dl/g indicating reasonably moderate molecular weights. Interestingly, ferrocene based aromatic polymers were more thermally stable (T g 260 o C, T i 310 o C, T h 525 o C, T f 720 o C, for PF 0 ), and also found to exhibit best ame retarding behavior (limiting oxygen index (LOI) value for PF 0 is LOI 33.15 %).

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Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Ferrocene-Based Polyamides and Their Organic Analogues Terpolyamides: Influence of Aliphatic and Aromatic Sequences on Physico-Chemical Characteristics

Khan

Akhter

Gul

et al. 2022

J Inorg Organomet Polym

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“…For example, the literature on carborane and POSS containing materials shows the unique ability of the 3D cage topology to dramatically rigidify a polymer backbone and yield more mechanically and thermally robust materials. Inorganic cages also imbue materials with element-specific effects such as neutron capture ability in carboranes . Beyond linear polymers, polyvalent cages are also well suited to make networked materials that exhibit solvent and gas porosity in some cases.…”

Section: Challenges and Opportunitiesmentioning

confidence: 99%

“…Inorganic cages also imbue materials with element-specific effects such as neutron capture ability in carboranes. 101 Beyond linear polymers, polyvalent cages are also well suited to make networked materials that exhibit solvent and gas porosity in some cases. Thus, the development of polymerizable inorganic cages has the potential to expand the repertoire of accessible materials in geometric ways that go beyond the electronic and steric tuning of monomers.…”

Section: ■ Challenges and Opportunitiesmentioning

confidence: 99%

Three-Dimensional Synthons for Cage-Dense Inorganic Polymers and Materials

Bedard,

Chitnis

2023

Chem. Mater.

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The relationship between the monomer structure and polymer properties is central to materials science. Here we discuss the notion of monomer dimensionality, as it refers to the presence of 1-dimensional chains, 2-dimensional rings, or 3-dimensional cages in inorganic polymers. We first highlight ring-containing systems, followed by classical 3-dimensional inorganic monomers (carboranes and polyhedral oligomeric silsesquioxanes, POSS). We then outline our development of modularly accessible phosphorus− nitrogen (PN) cages into polymerizable synthons to access linear or networked inorganic materials. Finally, we summarize the most important obstacles to advancement in the field and point toward areas where the most impactful discoveries are expected. Throughout the Perspective, an emphasis is placed on the properties that emerge when three-dimensional inorganic cages are present in the main chain, particularly as they contrast with materials containing monomers of lower dimensionality.

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“…Phosphorus-containing fire retardants are the most widespread as they are eco-friendly with several advantages such as: low toxicity, no release of dioxin and halogen acids, and producing low smoke during burning [2,[4][5][6]. Phosphorus-based fire retardants create a char coating on the polymer during the burning process, thus they serve to protect the unburned section of the polymer from the flame [7].…”

Section: Introductionmentioning

confidence: 99%