Thermoplastic Polymer based Modified Red Mud Composites Materials

Bhat, A. H.; Khalil, H. P. S. Abdul; Banthia, A. K.

doi:10.5772/14377

Cited by 7 publications

(5 citation statements)

References 27 publications

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“…On the basis of this proposal, our initial evaluation focused on the depolymerization of the commercial phenoxy resin (Table ). − We posited that the chain scission of this poly(hydroxy ether) would be favorable due to the stabilization of the C -centered radical by the adjacent oxygen atom within the backbone. Gratifyingly, we observed the degradation of the phenoxy resin ( M w ∼ 60,000 g/mol) upon subjecting it to our previously reported PCET conditions involving 3 mol % [Ir(dF(CF 3 )ppy) 2 (5,5′-d(CF 3 )bpy)]PF 6 ( Ir ), 25 mol % tetrabutylphosphonium dimethylphosphate (dMe-phosphate), and 25 mol % 2,4,6-triisopropylbenzene thiol (TRIP thiol) in toluene (i.e., mol % relative to hydroxyl repeat unit).…”

Section: Resultsmentioning

confidence: 99%

Depolymerization of Hydroxylated Polymers via Light-Driven C–C Bond Cleavage

et al. 2021

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The accumulation of persistent plastic waste in the environment is widely recognized as an ecological crisis. New chemical technologies are necessary both to recycle existing plastic waste streams into high-value chemical feedstocks and to develop next-generation materials that are degradable by design. Here, we report a catalytic methodology for the depolymerization of a commercial phenoxy resin and high molecular weight hydroxylated polyolefin derivatives upon visible light irradiation near ambient temperature. Proton-coupled electron transfer (PCET) activation of hydroxyl groups periodically spaced along the polymer backbone furnishes reactive alkoxy radicals that promote chain fragmentation through C–C bond β-scission. The depolymerization produces well-defined and isolable product mixtures that are readily diversified to polycondensation monomers. In addition to controlling depolymerization, the hydroxyl group modulates the thermomechanical properties of these polyolefin derivatives, yielding materials with diverse properties. These results demonstrate a new approach to polymer recycling based on light-driven C–C bond cleavage that has the potential to establish new links within a circular polymer economy and influence the development of new degradable-by-design polyolefin materials.

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Section: Resultsmentioning

confidence: 99%

Depolymerization of Hydroxylated Polymers via Light-Driven C–C Bond Cleavage

et al. 2021

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“…Another possible exploitation of raw hybrid materials is as catalysts [35]; for example, red mud, a secondary raw material composed primarily of iron oxides, can be used for pyrolysis and gasification of coal [36] as well as (composed with organic polymers) for many other applications [37]. Moreover, such materials can be utilised for adsorption of various pollutants from water ( [38]; for discussion on using hybrid materials for water treatment, please see the next section).…”

Section: Materials Efficiencymentioning

confidence: 99%

How Can Hybrid Materials Enable a Circular Economy?

Fijalkowski

Bardos

Kočí

et al. 2022

Ecological Chemistry and Engineering S

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Climate change, critical material shortages and environmental degradation pose an existential threat to the entire world. Immediate action is needed to transform the global economy towards a more circular economy with less intensive use of fossil energy and limited resources and more use of recyclable materials. Recyclable materials and manufacturing techniques will play a critical role in this transformation. Substantial advancements will be needed to achieve a more intelligent materials design to enhance both functionality and enhanced sustainability. The development of hybrid materials combining functionality at macro and nano scales based on organic and inorganic compounds, that are entirely recyclable could be used for tremendous applications. In this mini-review, we provide the reader with recent innovations on hybrid materials for application in water, energy and raw materials sectors. The topic is very modern and after its deep study we propose a creation an international research centre, that would combine the development of hybrid materials with green manufacturing. We have highlighted a framework that would comprise critical themes of the initial research needed. Such a centre would promote sustainable production of materials through intelligent hybridisation and eco-efficient, digital manufacturing and enable a circular economy in the long term. Such activities are strongly supported by current environmental and economical initiatives, like the Green Deal, REPower EU and digital EU initiatives.

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“…Polymer sand composites based on contaminated polyester waste have much higher properties in comparison to the systems based on polyolefins. [3] Niharika Mohanta, Dr S K Acharya [4] studied the polymer composites using materials like epoxy resin, e-glass fiber, red mud and dust. They reported that the micro-hardness increases as the filler concentration increases.…”

Section: International Journal Of Advance Engineering and Research Dementioning

confidence: 99%

A Review on Polymer Composites

2017

IJAERD

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Thermoplastic Polymer based Modified Red Mud Composites Materials

Cited by 7 publications

References 27 publications

Depolymerization of Hydroxylated Polymers via Light-Driven C–C Bond Cleavage

Depolymerization of Hydroxylated Polymers via Light-Driven C–C Bond Cleavage

How Can Hybrid Materials Enable a Circular Economy?

A Review on Polymer Composites

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