Postdocs

POST DOC RHEOLOGY AND PROCESSING OF MULTI-MICRO-/NANOLAYERED POLYMERS BASED ON TPE OR ELASTOMERS

POST DOC Rheology and processing of multi-Micro-/Nanolayered polymers based on TPE or elastomers  (PDF téléchargeable)

Description of the postdoctoral position :
Currently, nanostructured multilayer films have attracted tremendous interest because of their unique properties from the multiscale assembly, spatial confinement and interfacial effects. The challenge of this field is to design such nanostructured materials with controlled architectures and properties. Such nanostructured materials with controlled architectures and performances can be obtained by an innovative processing based on co-extrusion. Based on the concept of layer multiplication, this technology renders it possible to control the layer architecture and thickness from the micro- to the nano-scale. Herein, the multi-nanolayer film maximizes interface/interphase contributions and/or confinement-induced phenomena. The obtained nanostructured multilayer polymer films demonstrate in general highly tunable mechanical, electrical/dielectric, optical, gas/water barrier, and shape memory properties, arising mainly from the layer-layer interface effect. During processing, some interfacial instabilities (viscous encapsulation or secondary flows) occur. Moreover, interfacial distortions, layer heterogeneities, nano-droplets or layer breakup can be generated. Under such conditions, the interfacial properties are far from well understood to optimize the process and customize the target properties. In our recent works, a great effort has been dedicated to investigate the rheology, dynamics and processing of multi-micro/nanolayered polymers based on compatible or incompatible pairs. The keywords for this research are: structure-rheology-processing-property relationships.

Objectives :
When confined in the form of micro/nano-layers, TPEs are able to adopt original behaviors depending of their nanostructuration. The present proposal deals with the Multi-scale Studies of Confined TPE polymers in micro/nanolayered Structures based on model polymers with tailored interface/interphases properties. The main goal is to master/tune controlled associations of TPEs and/or elastomers and then study their rheological, morphological and tribological behavior in relation to the obtained structure. The nanostructured materials will be fabricated by coextrusion with the specific means of the IMP laboratory (Oyonnax). They will be the subject of mechanical and physicochemical characterizations at INSA in Lyon and at Michelin research center at Clermont-Ferrand. On one hand, the materials used for this study are to be defined on the basis of a well-known TPEs and elastomers formulated at Michelin research Centre. 
The guideline is to identify the property offsets of these structures compared to traditional materials depending of the target applications. 
On the other hand, the results will help to understand the fundamentals of the interfacial phenomena over different length scales. Some innovative interfacial rheological investigation will be developed. Hence, they will offer some new enlightenment for fundamental understanding of TPE layer confinement and the interphases development. Dual experiments and modelling will be performed for the high mismatched viscoelastic TPE materials. Overall, based on these finding, the outcome of the post-doctoral proposal should foster development of new nanostructured materials with tailored properties. 
This study will be carried out as part of a collaboration between the Lab.” Ingénierie des Matériaux Polymères” and the Michelin Company. This 12-months project will take place mainly at Oyonnax (IMP). Host institutions and laboratories : *UMR5 CNRS 2223 « Ingénierie des Matériaux Polymères », Pôle de compétences-Sterhéo : Structure et rhéologie des polymères – procédés et Modélisation. *Manufacture Française des Pneumatiques Michelin, Centre d’Étude et de Recherche de Ladoux.

Profile of candidate and expected skills  :
researcher trained in polymeric materials, rheology and mechanical testing/properties. PhD or confirmed engineer should have an interdisciplinary profile either in polymer science, rheology and/or polymer processing, tool design and modelling.

   Responsibilities and expected outputs : 
   - To conduct and develop an individual research topic, 
   - Potential supervision of early stage researchers, 
   - Presentation of the results at the company and during the internal lab meetings … 
   - Experience in topics related to the project - Must possess a PhD degree and/or a good research experience       as an Engineer, 
   - Fluency in written and spoken English for reports… 
  
   To apply :
The application must include: (i) the candidate’s detailed CV, (ii) letters of intent, (iii) a list of publications for phd candidate or detailed CV for engineer, (iv) copies of degrees. The successful applicant is expected to be an enthusiastic and self-motivated person with strong intellect who is able to take a creative approach to scientific tasks. The applicant should have the skills necessary to be an independent researcher in their respective areas of specialization. The ability to lead and a communicative personality are strong advantages 

Context :
Duration: 12 months. 
Cross salary:  2100 € neat/month including the French social insurance.
This 12-months project will take place mainly at Oyonnax (IMP).
Deadline : (Urgent) The selection will start asap. The project is scheduled to start on September 1st 2022. 

Contacts :
Khalid LAMNAWAR (Khalid.lamnawar @ insa-lyon.fr) (Professor,  IMP @INSA de Lyon), Tel. 04 74 81 93 09 ou 06 73 80 56 98. 
(Khalid.lamnawar @ insa-lyon.fr)Abderrahim Maazouz (Abderrahim.maazouz @ insa-lyon.fr) (Professor, IMP @INSA de Lyon), Tel. 04 72 43 63 32 ou 06 25 54 45 88. 
Jean Coué (jean.coue @ michelin.com) (Groupe Michelin) 

Websites : 
https://www.michelin.fr/ 
www.imp.cnrs.fr www.insa-lyon.fr 



POST DOC développement d'un mélange de polymères résistant au feu

POST DOC développement d'un mélange de polymères résistant au feu (PDF Téléchargeable)

Projet :

Le projet collaboratif ‘Ferroplaques’ a pour objectif de développer un matériau à base de polycarbonate / terpolymère acrylonitrile-butadiène-styrène (PC/ABS) adapté aux nouvelles contraintes du marché ferroviaire en termes de résistance au feu. En effet le matériau ignifugé actuellement utilisé ne répond plus à la nouvelle norme européenne. Le projet d’une durée de 3 ans est financé par le FUI et rassemble 4 partenaires principaux (entreprises Epsotech et Vercors thermoformage, laboratoires académiques IMP et UMET) ainsi qu’1 partenaire associé (Epsa). Ce projet entre dans sa dernière année et il reste 12 mois de contrat pour un post doctorant.
Dans ce cadre , le laboratoire Ingénierie des Matériaux Polymères (IMP - UMR CNRS 5223) recherche un post-doctorant. Son rôle sera de :
-Contribuer à la mise à jour de l’état de l’art sur l’ignifugation des mélanges PC/ABS en termes de brevets et publications scientifiques.
-Optimisation du développement de la formulation du nouveau matériau ignifugé développé dans le projet.
par ajout d’additifs de nouvelles générations par extrusion.
-Développement de nouveaux matériaux par génération in-situ du composé ignifugeant par extrusion réactive

Profil recherché :
Le candidat, docteur de préférence, devra nécessairement connaitre les polymères et leurs procédés de transformation, les méthodes de caractérisation, avoir des qualités de communication et d’intégration dans divers environnements.

Contexte :
Durée : 12 mois
Salaire mensuel : environ 2000 € net selon expérience.
Localisation : Laboratoire Ingénierie des Matériaux Polymère (IMP) – INSA de Lyon, Bât Jules Verne, 17 avenue Jean Capelle, 69621, Villeurbanne Cedex  (http://www.imp-umr5223.fr/
Employeur: INSAVALOR

Candidature :
CV à envoyer à:
Dr Véronique Bounor- Legaré : veronique.bounor-legare @ univ-lyon1.fr
Raphaël Brunel: raphael.brunel @ insa-lyon.fr

 



POST DOC IN REcycling by Reactive Extrusion

PA/Glass fiber recycling by reactive extrusion (PDF téléchargeable)

Project:
The objective is to develop performing materials from chemical recycling of PA/Glass Fibers using the reactive extrusion process. The driving idea is to reduce the viscosity of the PA by chemical modification in order to limit the breakup of glass fibers while in situ synthesis of an organic crosslinked phase in order to regenerate the polyamide/glass fibers interphase. The study aims to go from the fundamental aspects of the reaction/structuration to the scaling-up of the reactive extrusion process. Morphology evolution will be also evaluated. Besides, specific properties such as thermal, mechanical, creep will be deeply scrutinized.

Skills:
Polymer chemistry, polymer processing, polymer formulation

Context:
Duration: 24 months
Net monthly salary : 2140 €
Location: Ingénierie des Matériaux Polymères IMP UMR 5223 CNRS, Univerity Lyon1,, Villeurbanne, France

Contacts and supervisors:
Philippe Cassagnau: philippe.cassagnau @ univ-lyon1.fr 
Véronique Bounor-Legaré : veronique.bounor-legare @ univ-lyon1.fr