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Isothermal crystallization kinetic modeling of poly(etherketoneketone) (PEKK) copolymer

Choupin, T.; Fayolle, B.; Régnier, G.; Paris, C.; Cinquin, J.; Brulé, B.

Customer publications

Isothermal crystallization kinetic modeling of poly(etherketoneketone) (PEKK) copolymer

Choupin, T.; Fayolle, B.; Régnier, G.; Paris, C.; Cinquin, J.; Brulé, B.

Isothermal melt and cold crystallizations of a poly(etherketoneketone) (PEKK) copolymer prepared from diphenyl ether (DPE), terephthalic acid (T) and isophthalic acid (I) with a T/I ratio of 60/40 have been investigated by differential scanning calorimetry, wide-angle X-ray scattering and polarized optical microscopy. For the first time, the two-stage overall crystallization…
Integration of lysozyme into chitosan nanoparticles for improving antibacterial activity

Wu, Tiantian; Wu, Chunhua; Fu, Shalu; Wang, Liping; Yuan, Chunhong; Chen, Shiguo; Hu, Yaqin

Customer publications

Integration of lysozyme into chitosan nanoparticles for improving antibacterial activity

Wu, Tiantian; Wu, Chunhua; Fu, Shalu; Wang, Liping; Yuan, Chunhong; Chen, Shiguo; Hu, Yaqin

Lysozyme was integrated into chitosan nanoparticles (CS-NPs) to improve the antibacterial activity. CS-NPs and chitosan-lysozyme nanoparticles (CS-Lys-NPs) were prepared according to the ionic gelation technique and then characterized by average size, zeta potential, polydispersity index (PDI), atomic force microscopy (AFM), fourier transform infrared (FT-IR), small-angle X-ray scattering (SAXS),…
Inter-fibrillar tie chains determined critical stress of large strain cavitation in tensile stretched isotactic polypropylene

Lu, Ying; Lyu, Dong; Xiong, Bijin; Chen, Ran; Men, Yongfeng

(Natural) polymersCustomer publicationsOrientation analysisPolymer researchUSAXSWAXS

Inter-fibrillar tie chains determined critical stress of large strain cavitation in tensile stretched isotactic polypropylene

Lu, Ying; Lyu, Dong; Xiong, Bijin; Chen, Ran; Men, Yongfeng

Isotactic polypropylene (iPP) samples with pure mesophase, pure α modification, and coexistence of both phases were used to investigate the sudden stress whitening triggered at large strain during stretching. This whitening was caused by the cavities generated in the highly oriented amorphous network. The critical stresses of such cavitation-induced whitening…
Insights into gliadin supramolecular organization at digestive pH 3.0

Herrera, M. G.; Vazquez, D. S.; Sreij, R.; Drechsler, M.; Hertle, Y.; Hellweg, T.; Dodero, V. I.

Customer publications

Insights into gliadin supramolecular organization at digestive pH 3.0

Herrera, M. G.; Vazquez, D. S.; Sreij, R.; Drechsler, M.; Hertle, Y.; Hellweg, T.; Dodero, V. I.

Alpha-gliadin is a highly immunogenic protein from wheat, which is associated with many human diseases, like celiac disease and non-celiac gluten sensitivity. Because of that, gliadin solution is subject to intense biomedical research. However, the physicochemical nature of the employed gliadin solution at physiological pH is not understood. Herein, we…
Initiation of cavitation upon drawing of pre-oriented polypropylene film: In situ SAXS and WAXD studies

Xiong, Bijin; Kang, Jian; Chen, Ran; Men, Yongfeng

Customer publications

Initiation of cavitation upon drawing of pre-oriented polypropylene film: In situ SAXS and WAXD studies

Xiong, Bijin; Kang, Jian; Chen, Ran; Men, Yongfeng

Initiation of cavitation upon drawing of pre-oriented polypropylene films has been investigated via in-situ small angle X-ray scattering (SAXS) and wide angle X-ray diffraction (WAXD) techniques. The macroscopic strains for the initiation of the cavitation εcav and for the initiation of crystal shear εcs have been estimated from in-situ SAXS…
Influence of propylene-based elastomer on stress-whitening for impact copolymer

Lu, Ying; Sun, Yingying; Li, Lan; Men, Yongfeng

Customer publications

Influence of propylene-based elastomer on stress-whitening for impact copolymer

Lu, Ying; Sun, Yingying; Li, Lan; Men, Yongfeng

Two pure impact copolymer polypropylenes (ICP), one pure homo-polypropylene (HPP) and their compounds with different type and fraction of Vistamaxx™ propylene-based elastomer (“Vistamaxx”) were used to investigate the stress whitening activated in the impact processes via ultra-small-angle X-ray scattering technique. The whitening presented in ICP is confirmed to be caused…
Improving the fracture toughness of epoxy with nanosilica-rubber core-shell nanoparticles

Liu, Songlin; Fan, Xiaoshan; He, Chaobin

Customer publications

Improving the fracture toughness of epoxy with nanosilica-rubber core-shell nanoparticles

Liu, Songlin; Fan, Xiaoshan; He, Chaobin

Nanocomposites from epoxy and nanosilica-rubber core–shell nanoparticles were fabricated. The soft shell was a copolymer synthesized from caprolactone and meso-lactide and was designed compatible with the cured epoxy system. The core–shell nanoparticles achieved a reasonably good dispersion in the matrix with minor aggregations. With the addition of the nanosilica based…
Hydrazinium-loaded perovskite solar cells with enhanced performance and stability

Akbulatov, Azat F.; Frolova, Lyubov A.; Anokhin, Denis V.; Gerasimov, Kirill L.; Dremova, Nadezhda N.; Troshin, Pavel A.

Customer publications

Hydrazinium-loaded perovskite solar cells with enhanced performance and stability

Akbulatov, Azat F.; Frolova, Lyubov A.; Anokhin, Denis V.; Gerasimov, Kirill L.; Dremova, Nadezhda N.; Troshin, Pavel A.

In this study, we investigated the effects of partial substitution of methylammonium (MA) with hydrazinium (HA) cations on the optical properties, film morphology, crystal structure and photovoltaic performance of the hybrid perovskites MA1−xHAxPbI3. Planar heterojunction solar cells with an optimal hydrazinium loading demonstrated an enhanced power conversion efficiency of 11.6%…