Simultaneous SAXS-WAXS experiments on semi-crystalline polymers: Example of PA11 and its brill transition
TypeArticles dans des revues avec comité de lecture
This manuscript of the special issue “Microstructural Evolution and Mechanical Behavior of Semi-Crystalline Polymers” aims to show that Small Angle X-ray Scattering (SAXS) and Wide Angle X-ray Scattering (WAXS) experiments performed simultaneously constitute a unique tool to obtain valuable information on the hierarchical structure of semi-crystalline polymers. These structural quantitative data are needed tomodel macroscopic properties of polymeric materials, for example their mechanical properties. To illustrate our point, we focus our study on the structure and morphology of polyamide 11. Through a simultaneous SAXS-WAXS experiment, we show that the absence of enthalpic signal in Differential Scanning Calorimetry (DSC) is not synonymous with the absence of structural and morphological evolution with temperature. The case of a thermally activated crystal–crystal transition, the Brill transition, is particularly detailed. Through this SAXS-WAXS study, we show, among other points, and for the first time, that the periodicity of crystalline lamellae (LP) changes at the transition, probably due to a modification of the amorphous phase’s free volume at the Brill transition. We also explain the crucial role of annealing to stabilize polymeric materials that may experience temperature changes over their lifetime. The influence of the annealing on the perfection of crystalline structure, morphology and mechanical behavior is more particularly studied.
Files in this item
Showing items related by title, author, creator and subject.
High and Temperature-Independent Dielectric Constant Dielectrics from PVDF-Based Terpolymer and Copolymer Blends THUAU, Damien; KALLITSIS, Konstantinos; HA, Sara; BARGAIN, François; SOULESTIN, Thibaut; PÉCASTAINGS, Gilles; TENCÉ-GIRAULT, Sylvie; DOMINGUES-DOS SANTOS, Fabrice; HADZIIOANNOU, Georges P. (Wiley, 2020)Relaxor ferroelectric polymers exhibit high k at their structural phase transition around room temperature. They are particularly attractive as gate dielectric in organic field effect transistor (OFET). Nevertheless, their ...
Thermal behavior of poly(VDF-ter-TrFE-ter-CTFE) copolymers: Influence of CTFE termonomer on the crystal-crystal transitions BARGAIN, François; THUAU, Damien; PANINE, Pierre; HADZIIOANNOU, Georges; DOMINGUES DOS SANTOS, Fabrice; TENCE-GIRAULT, Sylvie (elsevier, 2019)Depending on their CTFE content (from 0 to 10 mol %), poly (VDF-ter-TrFE-ter-CTFE), poly(vinylidene fluoride-ter-trifluoroethylene-ter-chlorotrifluoroethylene) copolymers exhibit ferroelectric (FE) or relaxor ferroelectric ...
NGUYEN, Anh Ngoc; SOLARD, Jeanne; NONG, Huyen Thi Thanh; OSMAN, Chirine Ben; GÓMEZ, Andrés; BOCKELÉE, Valérie; TENCÉ-GIRAULT, Sylvie; SCHOENSTEIN, Frederic; SIMÓN-SORBED, Maite; CARRILLO, Anna Esther; MERCONE, Silvana (MDPI, 2020)We optimize the elaboration of very thin film of poly(vinylidene fluoride) (PVDF) polymer presenting a well-controlled thickness, roughness, and nano-inclusions amount. We focused our effiort on the spin coating elaboration ...
KALLITSIS, Konstantinos; SOULESTIN, Thibaut; TENCÉ-GIRAULT, Sylvie; BROCHON, Cyril; CLOUTET, Éric; DOMINGUES-DOS SANTOS, Fabrice; HADZIIOANNOU, Georges P. (American Chemical Society, 2019)Fluorinated electroactive polymers (FEPs) are among the most interesting insulating materials for the production of organic electronic devices. Their ability to tune their response to an applied electric field makes them ...
Microstructure-mechanical properties relationships in vibration welded glass-fiber-reinforced polyamide 66: A high-resolution X-ray microtomography study MOFAKHAMI, Eeva; TENCÉ-GIRAULT, Sylvie; PERRIN, Jonathan; SCHEEL, Mario; GERVAT, Laurent; OVALLE RODAS, Cristian; LAIARINANDRASANA, Lucien; FAYOLLE, Bruno; MIQUELARD-GARNIER, Guillaume (ELSEVIER, 2020)The effect of initial fiber orientation and welding conditions on the mechanical properties and microstructure of 30 wt% glass-fiber-reinforced polyamide 66 was systematically evaluated. For all conditions studied no ...