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Shear-Induced Transformation of Polymer-Rich Lamellar Phases to Micron-Sized Vesicles

Großkopf, Sören; Tiersch, Brigitte; Koetz, Joachim; Mix, Andreas; Hellweg, Thomas

Customer publications

Shear-Induced Transformation of Polymer-Rich Lamellar Phases to Micron-Sized Vesicles

Großkopf, Sören; Tiersch, Brigitte; Koetz, Joachim; Mix, Andreas; Hellweg, Thomas

In the present work, we study the shear-induced transformation of polymer-rich lamellar phases into vesicles. The evolution of vesicle size is studied by different scattering techniques, rheology, and microscopy methods. The lamellar phase found in the system D2O/o-xylene/Pluronic PE9400/C8TAB can be fully transformed to multilamellar vesicles (MLVs) by applying shear.…
Large strain cavitation induced stress whitening in propylene-butene-1 copolymer during stretching

Lyu, Dong; Tang, Yujing; Qian, Li; Chen, Ran; Lu, Ying; Men, Yongfeng

Customer publications

Large strain cavitation induced stress whitening in propylene-butene-1 copolymer during stretching

Lyu, Dong; Tang, Yujing; Qian, Li; Chen, Ran; Lu, Ying; Men, Yongfeng

Large strain cavitation induced stress whitening was observed in propylene-butene-1 copolymer during stretching by means of ultra-small angle X-ray scattering technique. The critical stress for initiating this cavitation depended on the stretching temperature (Ts). A constant critical stress was found below Ts of 125 °C while the stress started to increase…
Oxidation reactions in kink banded regions of UHMMPE fiber-based laminates used in body armor: A mechanistic study

Tsinas, Zois; Forster, Amanda L.; Al-Sheikhly, Mohamad

Customer publications

Oxidation reactions in kink banded regions of UHMMPE fiber-based laminates used in body armor: A mechanistic study

Tsinas, Zois; Forster, Amanda L.; Al-Sheikhly, Mohamad

This work demonstrates the synergy between the thermo-mechanical and humidity induced degradation as well as the oxidation reactions in the kink-banded areas of ultra-high molar mass polyethylene (UHMMPE) fiber-based laminates used in body armor. For aged materials, the energy-dispersive X-ray spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR) results reveal…
Achieving grazing-incidence ultra-small-angle X-ray scattering in a laboratory setup

Zheng, N.; Yi, Z.; Li, Z.; Chen, R.; Lai, Y.; Men, Y.

Customer publications

Achieving grazing-incidence ultra-small-angle X-ray scattering in a laboratory setup

Zheng, N.; Yi, Z.; Li, Z.; Chen, R.; Lai, Y.; Men, Y.

A grazing-incidence sample stage was designed for realizing grazing-incidence scattering measurements, especially in the ultra-small-angle regime, in a modified Xenocs Xeuss system in the laboratory. The designed sample stage, which is composed of four separate motorized positioning stages, allows the sample to be moved along four different directions to locate…
Adsorption of F127 onto Single-Walled Carbon Nanotubes Characterized Using Small-Angle Neutron Scattering

Kastrisianaki-Guyton, E. S.; Chen, L.; Rogers, S. E.; Cosgrove, T.; van Duijneveldt, J. S.

Customer publications

Adsorption of F127 onto Single-Walled Carbon Nanotubes Characterized Using Small-Angle Neutron Scattering

Kastrisianaki-Guyton, E. S.; Chen, L.; Rogers, S. E.; Cosgrove, T.; van Duijneveldt, J. S.

Aqueous single-walled carbon nanotube dispersions are often made using polymers from the pluronic family of amphiphilic block copolymers; however, relatively few studies have been conducted using small-angle neutron scattering techniques to discover the mechanism by which they act. SANS results reported here show that a relatively simple core?shell cylinder model…