CMMS invites applicants to participate in a competition for the full-time National Science Centre (NCN) – funded scholarship position (post-doc) available in Polymer Physics Department – research conducted within NCN OPUS project ” Cavitation in polymer nanocomposites”:
The improved properties of a nanocomposite are preserved as long as the contacts on interfaces exist. Any excessive deformation, such as incidental bending, may cause the debonding between the nanoparticles and the polymer matrix leading to a loss of properties. Around a nanoparticle a nanocavity is formed. If nanocomposite is further deformed then nanocavities transform to cavities in micrometer range, visible as whitening. We think that cavitation occurs mainly at the polymer-nanoparticle interface and the cavitation progresses with increasing strain through an initial phase with no detectable cavitation to a period of faster cavitation which can be sensed by x-ray methods and detected ex-situ in various microscopes. The increase of volume of composite when cavitation begins is usually not significant, which means that the actual critical strain/stress for the onset of cavitation is much lower than the measured value. The aims of this project are:
to determine the onset of cavitation as a function of interfacial bonding in several polymer nanocomposites varying in the shape of dispersed nanoparticles from nanograins, nanotubes to nanoplates.
to explore further stages of cavitation with increasing strain for nanocomposites prepared and tested in Aim #1.
to evaluate and analyze the acting stresses on the interface between nanoparticle and a polymer matrix considering in particular: interfacial tension, thermal stresses arising during compounding and solidification, and the pressure resulting from extreme curvature of the interface around nanoparticles (p=2σ/r, which can amount to few hundred or even thousand bars).
to correlate macroscopic properties of nanocomposites with debonding and cavitation.
Position name: adjunct (full time NCN-funded scholarship)
Type of NCN competition: OPUS ST8
Requirements:
PhD in science or engineering (engineering, material science, physics, chemistry, or related)
High average grade of studies;
interest in experimental physics/chemistry of polymers;
solid background in polymer physics and physical chemistry, especially in nanomaterials and nanocomposites
good record of publications in the field of nanocomposites and nanomaterials
skills in experimental methods: all microscopies, x-ray scattering and diffraction, calorimetry, mechanical testing, reometry, polymer processing
good command of English.
high motivation for scientific work and a strong commitment to research work.
readiness to continuously improve and expand their skills.
readiness to participate actively in the academic life of the Institute and the research team.
Description of tasks and other work, to be performed by a candidate: Research conducted within the project ” Cavitation in polymer nanocomposites “.
Performing research tasks in the framework of the project, including:
to determine the onset of cavitation as a function of interfacial bonding in several polymer nanocomposites varying in the shape of dispersed nanoparticles from nanograins, nanotubes to nanoplates.
to explore further stages of cavitation with increasing strain for nanocomposites prepared and tested in Aim #1.
to evaluate and analyze the acting stresses on the interface between nanoparticle and a polymer matrix considering in particular: interfacial tension, thermal stresses arising during compounding and solidification, and the pressure resulting from extreme curvature of the interface around nanoparticles (p=2σ/r, which can amount to few hundred or even thousand bars).
to correlate macroscopic properties of nanocomposites with debonding and cavitation.
Compilation of data and results; documentation and maintenance of laboratory notebooks.
Communication and discussion of results within the research team.
Analysis of results and preparation of publication in scientific journals and presentations at scientific conferences.
Deadline of sending application: 28 July, 2017. 23:59
Form of applications: Applications in English can be send by e-mail to Prof. Andrzej GALESKI, , and the copy (CC) to Dr. B. Jezynska, ; with a note ” Post-doc position in Polymer Physics Department”,
please, attach the requested documents in the PDF format.
During the recruitment process the selected candidates may be invited for an interview.
Relevant documents: Qualified researchers interested in applying for the position should submit the following documents:
letter of motivation
CV / scientific resume
copy of the PhD diploma
the list of scientific achievements (publications, participation in conferences), awards, scientific stays
letter(s) of recommendation obtained from people (e.g. promoters) directly cooperating with the candidate.Please include in the application the following statement: “I hereby authorize to process my personal data included in my application for the needs of the recruitment process (in accordance with the Act of 08.20.1997 r. on personal data protection – Dz. U. No 133, item 883 ) “.
Conditions of Employment: taxed National Science Centre (NCN) funded scholarship in the amount 7000 zł (Polish zloty) gross per month; while being employed in the Institute (health care, insurance). The expected beginning of employment is August-September 2017.
Additional information:
– Period of payment of the scholarship: up to 24 months. There is a possibility of employment in CMMS after the scholarship period.
For additional information please contact Prof. Andrzej Galeski (project leader) tel. +48 (42) 6803-250, e-mail: , or Dr. Barbara Jezynska (Scientific Secretary of CMMS), tel. +48 (42) 6803-232 , e-mail:
Informujemy, że stypendium typu post-doc w Projekcie NCN w Zakładzie Fizyki Polimerów – badania prowadzone w ramach projektu OPUS pt. ”Kawitacja nanokompozytów polimerowych” uzyskała p. dr Hanieh Kargazadeh
Autor: Centrum Badań Molekularnych i Makromolekularnych
