Dresden , Germany
2015-06-21
2015-06-26

Join us for our main events at EPF2015 !

Lunchtime session

SAXS/WAXS investigation of polymer materials: from structure to properties

Tuesday June 23^rd

12:45 – 13:45, Room Konf. 1/2

Come & join us for our special lunch time session in room Konf 1/2 at 12:45.

The aim of this session is to illustrate the latest achievements in polymer characterization using cutting-edge lab Small-Angle X-ray Scattering instruments (USAXS, SAXS, WAXS).

 

Confirmed Invited speakers:

• Prof. Yongfeng Men, Changchun Institute of Applied Chemistry, Chinese Academy of Science, China
• Prof. Dimitri Ivanov, Institute of Materials Science of Mulhouse, CNRS UMR 7361, France

“Stress-whitening in Isotactic Polypropylene at large Strains during Tensile Deformation at Elevated Temperatures”

Ying Lu and Yongfeng Men*

State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Renmin Street 5625, 130022 Changchun, P.R. China

Abstract:

Two quenched isotactic polypropylene samples with different molecular weight were used to explore the sudden stress whitening activated at large strains during stretching at elevated temperatures via ultra small angle X-ray scattering technique. This kind of stress whitening was confirmed to be caused by the creation of cavities within the highly oriented samples. The critical strain for initiating the stress whitening increases with the increase of stretching temperature and molecular weight whereas the critical stress for the stress whitening depends only on molecular weight irrespective of stretching temperature. Thus, this peculiar stress whitening behavior under large strain deformation can be understood as a consequence of disentanglement of the highly oriented amorphous network caused by successive breaking of the tie chains connecting fibrils. During large strain deformation, two independent processes can occur. Besides the disentanglement induced cavitation, stacked lamellar structure within micro-fibrils can be destroyed in high molecular weight sample. In such case, the critical stress for lamellae destruction is lower than that of disentanglement.

“Advanced structural characterization of thin organic films for electronic and optical applications. Further perspectives for integration of in-situ chip calorimetry for studies of nano-gram-sized samples.”

Prof. Dimitri Ivanov

Abstract:

In the talk, several examples of structural characterization of thin organic films using grazing-incidence X-ray scattering with Xenocs SAXS/WAXS system will be presented. It will be shown how the information on the film structure and texture allow understanding the potential of the materials such as indigo [1] for applications in organic electronics and optics. The research on thin films will be illustrated on materials ranging from small organic molecules to high polymers and copolymers. The perspectives of further instrumentation development including integration of ultra-fast chip calorimetry will be described [2].The latter will allow employing nano-gram-sized samples for the structural analysis at various temperatures.

References:

[1] D. V. Anokhin, L. I. Leshanskaya, A. A. Piryazev, D. K. Susarova, N. N. Dremova, E. V. Shcheglov, D. A. Ivanov, V. F. Razumov and P. A. Troshin // Towards understanding the behavior of indigo thin films in organic field-effect transistors: a template effect of the aliphatic hydrocarbon dielectric on the crystal structure and electrical performance of the semiconductor. Chem. Commun. 50 (2014)7639-7641.

[2] Christian Riekel, Emanuela Di Cola, Manfred Burghammer, Michael Reynolds, Martin Rosenthal, David Doblas, Dimitri A. Ivanov // Thermal Transformations of Self-Assembled Gold Glyconanoparticles Probed by Combined Nanocalorimetry and X‑ray Nanobeam Scattering. Langmuir 31 (2015) 529–534.

 

Food and drinks allowed in the room. Buffet lunch just in front of the room.

Drawing

Thursday June 25^th

13:00, Xenocs booth

 

Win a week-end for two for the spectacular “fête des lumières” in Lyon, France !

For the International year of Light, win a week-end for 2 in Lyon, France, for the famous & spectacular “fête des lumières” !*

Come to Xenocs booth all week long to fill in your coupon.

Drawing on our booth at 1pm on Thursday 25^th!

 

* From December 5^th to 8^th 2015, Lyon will be awash with light!… www.fetedeslumieres.lyon.fr/en/

* Includes return flight, one hotel room for 2 nights in Lyon and lunch for 2 people in a typical Lyonnais restaurant.

Talk

Monday June 22^nd

16:15 – 16:30, Konf. 1/2 – Nanomaterials

« Semi-crystalline polymer films investigation using simultaneous SAXS/WAXS out-of-equilibrium experiments”

P. Panine, M. Fernandez-Martinez, S. Desvergne, F. Bossan and P. Hoghoj

Xenocs S.A., Sassenage, France – [email protected]

Abstract:

Ultimate performance of polymeric materials are often related to the phases present and to their relative levels of crystallinity. Processing departments determine empirical routes, by the mean of annealing protocol prior delivering the material toward end user. Such steps are time and energy consuming but often only limited ones are necessary in the attempt to erase any prior thermal history. These protocols are usually predefined using standard thermal tool i.e. differential calorimetry (DSC) but do not evidence the precise phase content or distribution. It is also often observed the interdependence of a structure present at the atomic scale (crystalline phase) and at the mesoscale (i.e. lamellar, hexagonal…) but the related signature in the DSC remains imprecise with this respect. It is therefore of particular interest to perform a simultaneous investigation of the structures present, both at the atomic and mesoscopic scale. Combining Small Angle X-Ray Scattering (SAXS) and Wide Angle X-ray Scattering (WAXS) provide together information on sample structure parameters 1 nm to beyond 100 nm (SAXS) and on length-scales down to 0.1 nm (WAXS). In this paper, we present recent results on the thermal behavior of polymeric films undergoing crystalline phase transformation during a thermal process after film formation.

 

NANO‐L‐7 10199 Desvergne (Konf. 1/2 – Nanomaterials)

Please come & meet us after the talk !

Poster session

Monday 22^nd– Tuesday June 23^rd

13:30-15:00

« Investigation of semi-crystalline polymer structures with a laboratory SAXS/WAXS instrument”

S. Desvergne-Bléneau, M. Fernández-Martínez, P. Panine, F. Bossan, S. Rodrigues and N. Galatanu

Xenocs SA, Sassenage, France – [email protected]

Abstract:

During industrial transformation, most polymers are involved in specific processes resulting in macromolecular chain orientation. Such orientation occurs from the nano-scale to the mesoscale and sometimes up to the macroscopic scale. Moreover, new materials based on a bottom up approach (i.e. self-assembly of complex materials as such as block copolymer) are of significant interest for a wide range of applications. Still, further control and understanding of their morphology is needed, either for fundamental studies or for routine quality verification.
Small Angle X-ray Scattering (SAXS) is a powerful measuring method for investigating nanostructured polymer materials providing information in the range from 1 nm to beyond 150 nm such as nanoscale morphology, mesoscale phase identification, as few examples. Furthermore, orientational functions of stretched matrices or of self assembled polymers can be derived from 2-dimensional x-ray patterns. Crystalline structure can also be investigated by Wide Angle X-ray Scattering (WAXS) measurements. Major developments in components and sub-assemblies achieved in the past years offer capabilities for fast routine measurements, screening process parameters or samples [2].
This poster summarizes important developments on SAXS/WAXS laboratory instrumentation, emphasizing the impact for semi-crystalline polymers characterization. Recent results on the thermal behavior of polymeric films undergoing crystalline phase transformation during a thermal process will illustrate the interest for simultaneous data collection to reveal nanoscale structure and crystalline phase. Moreover, a high throughput characterization of microinjected semicrystalline polymers is presented. In this experiment, is emphasized the nanostructure orientation and processing relationships within the polymer. Finally, recent results obtained from measurements on in-situ stretched Polybutene-1 (PB-1) illustrate the capability to perform lab measurement equivalent to Synchrotron USAXS (Ultra Small Angle X-Ray scattering), and demonstrate the capability to study the microscopic structural evolution and macroscopic strain-whitening phenomenon correlation with laboratory based instruments.

 

Poster session SOFT P-045

We are looking forward to exchanging ideas ! Please do come along !