Crystallization behavior and morphological features of ethylene-vinyl alcohol 44 copolymer
Article dans une revue avec comité de lecture
This work is a first attempt to study the crystallization behavior of ethylene-vinyl alcohol copolymer with 44 mol% of ethylene units (EVOH44) and to observe the supermolecular structures developed during its crystallization. Thermal analysis has evidenced a very fast crystallization and the formation of different crystal populations during isothermal crys-tallization. In-situ wide-angle X-ray scattering experiments using a synchrotron radiation source have shown a unique or-thorhombic morphology, independently of the crystallization conditions. Small spherulites (with an average radius of about 1 µm) were observed using polarized optical microscopy and confirmed by typical four-leaf patterns obtained by small-angle light scattering. In-situ atomic force microscopy has revealed stacked lamellae growing from common centers to form small spherulitic entities. Finally, studies of isothermal crystallization have evidenced the existence of partial crystallization (especially at high crystallization temperatures) and the need for higher undercooling to complete crystallization. © BME-PT.
Showing items related by title, author, creator and subject.
Article dans une revue avec comité de lectureROLAND, Sébastien; MIQUELARD-GARNIER, Guillaume; GERVAIS, Matthieu; GUINAULT, Alain; SOLLOGOUB, , Cyrille (Elsevier, 2016)We report the making of multilayered self-assembled films by coextrusion, composed of alternated layers of confining polycarbonate and confined poly(styrene-. b-butadiene-. b-methyl methacrylate), whose blocks are chemically ...
Impact on thermomechanical behaviour of a maleic anhydride grafted ABS on ABS/PC multi-layered blends Communication sans acteGERVAIS, Matthieu; ALKHUDER, A; GRANDMONTAGNE, A.; GUINAULT, Alain; SOLLOGOUB, Cyrille (2013)The significant increase of Waste Electric and Electronic Equipment (WEEE) has led to an important research in upgrading recycled engineering plastics by means of a blending technique. In particular, there is an interest ...
Combined compatibilization and plasticization effect of low molecular weight poly(Lactic acid) in poly(lactic acid)/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) blends Article dans une revue avec comité de lectureMIQUELARD-GARNIER, Guillaume; GUINAULT, Alain; SOLLOGOUB, C.; GERVAIS, Matthieu (BME-PT Hungary, 2018)Improving overall properties of poly(lactic acid) (PLA) by blending it with another biobased polymer has been a strong field of research over the last years. In this study we demonstrate the synergetic effect of a small ...
Article dans une revue avec comité de lectureBAHRY, Teseer; KHURSHID, Benazir; CHOULI, Yamina; ABOU ZEID, Souad; SOLLOGOUB, Cyrille; GERVAIS, Matthieu; BUI, Thanh-Tuân; GOUBARD, Fabrice; REMITA, Samy (Royal Society of Chemistry (RSC), 2021)In the present study, copolymers of pyrrole (Py) with different co-monomers (thiophene derivatives) were originally polymerized through two radiolytic approaches: water radiolysis and dichloromethane radiolysis. This method ...
Optimal strategy based on radiation chemistry for facile and direct synthesis of poly(3-thiophene acetic acid) polymers in water and dichloromethane Article dans une revue avec comité de lectureBAHRY, Teseer; CUI, Zhenpeng; DENISET-BESSEAU, Ariane; GERVAIS, Matthieu; MBOMEKALLE, Israël; SOLLOGOUB, Cyrille; AUBERT, Pierre-Henri; BUI, Thanh-Tuân; REMITA, Samy (Royal Society of Chemistry, 2020)In this work, synthesis of nanostructured conducting poly(3-thiophene acetic acid) (PTAA) polymers was developed by means of γ-induced oxidative polymerization of TAA monomers dissolved either in water or in dichloromethane. ...