•Microscopic characterization of recycled carbon black.•Incorporation of recycled carbon black obtained from waste tyre pyrolysis in EPDM rubber.•Comparison of recycled carbon black with N550 with ...respect to cure characteristics, thermal and mechanical properties.•Study the effect of heat aging on mechanical properties.
End-of-life (EOL) tyres and their decomposition present severe environmental concern due to their resistance to moisture, oxygen, natural degradation, etc. Pyrolysis is considered to be the most effective and sustainable process for recycling, due to its eco-friendly process. The current work studied the effect of recycled carbon black (rCB), obtained from the pyrolysis of EOL tyres, on the properties of ethylene propylene diene rubber (EPDM). The rCB was characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and chemical methods. rCB was incorporated solely, into a conventional EPDM formulation and also in combination with N550 carbon black. The physico-mechanical properties of the EPDM vulcanizates, before and after aging, were succinctly studied by SEM, TGA, Differential Scanning Calorimetry (DSC), tensile tests and cross-link density. The average particle size of rCB was observed to be 8 µm and the ash content was observed to be higher when compared to the conventional N550 carbon black, which was evident, by the TGA and SEM-EDX analyses. The reinforcing effect and the cross-link density of the rCB-filled vulcanizates were found to be marginally inferior in comparison to the conventional carbon black (N550). The morphology of the tensile- and tear-fractured surfaces were studied by SEM and it was observed that the breaking mechanism follows the rubber chain detachment from the surface mode.
The present study explores the feasibility of using a mathematical enhancement, such as the second order derivative of FTIR-ATR spectra, for compositional analyses of natural rubber (NR), chloroprene ...rubber (CR) and their blends in carbon black-filled vulcanizates. The infrared spectra of natural rubber, polychoroprene rubber and their respective carbon black-filled vulcanizates were recorded by using FTIR-ATR on a germanium crystal. Subsequently, the second order derivative of the spectra was obtained for analysis. The important infrared bands for the identification of these materials were assigned, and compositional analyses of the blends were carried out by using the second order derivative spectra.
Purpose
The purpose of this paper is to develop a new model in which the interrelationship between the barriers can be determined that hinder the implementation of effective recycling processes in ...the plastic sectors of India.
Design/methodology/approach
Today manufacturers do not want their input to be deemed waste and subsequently be discarded, so their efforts and resources have been channeled into the development of efficient recycling methods. However, there are several barriers hindering the implementation of effective and efficient recycling. In this paper several of the most influential barriers are taken into consideration and implemented in the interpretive structural modeling.
Findings
The results divided the barriers into four clusters and identified the weak and strong barriers and implemented relationships between them.
Research limitations/implications
Globally plastic waste has been steadily increasing. Recycling plastic has received much attention because many companies are using it as a strategic tool to serve their customers and to generate good revenue, but there is a lack of effective recycling units in India. The work of this paper and its results will be helpful in the implementation of an effective and efficient recycling unit for the plastic sector.
Practical implications
The recycling process can be improved by avoiding barriers of PLASTIC recycling.
Originality/value
In this paper, the plastic industries of India are studied and analyzed, and the barriers are found.
A Letter to My Daughter Datta, Suchismita
The Journal of emergency medicine,
January 2023, 2023-Jan, 2023-01-00, 20230101, Letnik:
64, Številka:
1
Journal Article
In 2016, summarily outlawing all chemical inputs, the Indian state of Sikkim transitioned to completely organic agriculture. Despite “organic discontents” of farmers and citizens about autocratic ...implementation, lowered yields, and unsatisfactory prices, “Sikkim Organic” enjoys global accolades and local compliance. The paradox of alternative agriculture in the Global South is that it is often promoted by the same state-science-capital hegemonic formation that pushed the conventional paradigm. How has the Sikkimese state negotiated this paradox and continued to claim success, when other radical state-led organic transformations have failed? Recent scholarship advocates for contextual definitions of organic success, beyond the parameters of yield and profit. They examine the socio-political concerns of farmers, middlemen and consumers that shape their engagement with the phenomenon. This lens is seldom applied to the state. Drawing on ethnographic conversations with farmers, local consumers, state officials and discourse analysis of governmental literature and speeches, this article analyzes the Sikkimese state’s efforts at consolidating its hegemony as a process of political brand-building. Highlighting the cultural aspects of policy implementation, it analyzes the affective resonances about traditional agrarian practices and about the morality of organic markets that the state discursively creates to support its organic regime. This extends the critique of the state beyond the focus on governmentality and neoliberalization through state-led certification/standardization. The article neither absolves the state of its failures nor dismisses the potential of progressive organic policies. It shows the significance of contextual cultural-political framings in determining outcomes of large-scale experiments towards sustainable agrarian futures.
Response to the Letter to the Editor Das, Suchismita
Environmental science and pollution research international,
12/2020, Letnik:
27, Številka:
34
Journal Article
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