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The purpose of this paper is to evaluate the fire resistance of an innovative carbon-reinforced PEKK composite for aeronautical applications. To this end, thermal degradation analysis under inert and oxidative atmosphere is carried out. Moreover, a linear model fitting approach is compared to a generally used isoconversional method to validate its reliability for kinetic triplet estimation.

Thermogravimetric analysis carried out under inert and oxidative atmospheres, between 25 and 1000°C for three different heating rates (5, 15, 25°C/min), followed by a qualitative SEM observation of the samples before and after thermal treatment. After the reaction identification by TG/DTG curves, an isoconversional analysis is carried out to estimate the activation energy as a function of the reaction conversion rate. For the identified reactions, the kinetic triplet is estimated by different methods and the results are compared to evaluate their reliability.

In inert case, one global reaction, observed between 500-700°C, seems able to describe the degradation of carbon-PEKK resin. Under oxidative atmosphere, three main reactions are identified, besides the resin degradation, the other two are attributed to char and fiber oxidation. Good agreement achieved between isoconversional and linear model fitting methods in activation energy calculation. The achieved results demonstrate the high thermal resistance of PEKK associated with the ether and ketone bonds between the three aromatic groups of its monomer.

This paper provides a possible degradation model useful for numerical implementation in CFD calculations for aircraft components design, when exposed to high temperatures and fire conditions.

This article wants to propose deeper insights and clarifications into the effects of organizational politics which have been at the center of many debates in decision-making literature. For a long time, the debate focused on the negative effects of organizational politics and how to avoid them. This article wants to explore the positive effects of organizational politics and see how this impacts the consensus process in teams moderated by organizational change.

The article model and propositions are grounded in the organisational politics literature. The analysis builds on the “positive” politics literature which has been gaining steam in the last two decades and links this with the consensus literature.

The article proposes an integrated model which clearly shows how the three core concepts influence each other through the four proposed hypotheses. Organizational politics can help to create more consensus in a team decision-making process, and this can have a positive effect on team performance.

The article aims to expand insights of organizational politics on decision-making by putting the light on possible positive effects of organizational politics. The article addresses the theoretical gap of how organizational politics can impact the consensus process.

Religious expression at work (REW) has a unique place in France. The authors studied the perception of the postures of four organizations in the face of this phenomenon, focusing on the gap between official posture and the posture applied by managers.

Using a qualitative approach, the authors conducted semi-structured interviews (40), observation periods and documentary analysis within four organizations. This multiple embedded case study was undertaken in four different firms in France: an international private firm, a public organization, and two small- and medium-sized enterprises (SMEs) with original models of REW management.

A distinction between aligned and non-aligned postures emerged. There was a lack of alignment in only two of the four organizations, and this alignment concerned only two units of analysis: prayer on break and wearing religious symbols. Several extrinsic factors were identified in this lack of alignment between the official posture and the posture actually applied by managers: the form of REW, the religion concerned and whether it had minority status in the country, the degree of clarity of the official posture, the degree of formalization of the official posture, the size and scope of the company, the degree of awareness of managers and their teams, the degree of involvement of leaders in the definition and implementation of the posture, and the purpose of the official posture.

This research provides a sensitive understanding of religious expression at work and shows that alignment is sought specifically for each form of REW. The distinction between official posture and applied posture is highlighted through the study of perceptions. In addition, this study enables the identification of factors that influence the alignment of official and operational postures.

These results call for clarity of the official posture and for it to be defended by leaders, provision of meaning to postures by raising awareness among intermediate hierarchical lines, understanding of the applicable legal framework to transpose it to the local level, and analysis of unaligned forms of REW to build a strong, shared posture.

This study, which was carried out within a specific French context, concerns areas that have received little attention or have not been studied at all to date, such as REW in SMEs or in the public sector, and demonstrates for the first time the distinction between official postures and effective postures.