Real-Time Infrared–Mechano-Optical Behavior and Structural Evolution of Polypropylene and Hydroxyl-Functionalized Polypropylene during Uniaxial Deformation

2015 ◽  
Vol 48 (17) ◽  
pp. 6294-6305 ◽  
Author(s):  
I. Offenbach ◽  
S. Gupta ◽  
T. C. M. Chung ◽  
R. A. Weiss ◽  
M. Cakmak
Keyword(s):  
Real Time ◽  
Structural Evolution ◽  
Uniaxial Deformation ◽  
Optical Behavior

scholarly journals Effect of tungsten disulfide nanotubes on crystallization of polylactide under uniaxial deformation and annealing

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Fausta Loffredo ◽  
Loredana Tammaro ◽  
Tiziana Di Luccio ◽  
Carmela Borriello ◽  
Fulvia Villani ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Structural Evolution ◽  
Tungsten Disulfide ◽  
Fine Tuning ◽  
Nanocomposite Films ◽  
Uniaxial Deformation ◽  
Scanning Calorimetry ◽  
X Ray ◽  
X Ray Scattering

AbstractTungsten disulfide (WS2) nanotubes (NTs) are examined here as a filler for polylactide (PLA) for their ability to accelerate PLA crystallization and for their promising biocompatibility in relevant to biomedical applications of PLA-WS2 nanocomposites. In this work, we have studied the structural and thermal properties of PLA-WS2 nanocomposite films varying the concentration of WS2 NTs from 0 (neat PLA) to 0.6 wt%. The films were uniaxially drawn at 90 °C and annealed at the same temperature for 3 and 10 min. Using wide angle x-ray scattering, Raman spectroscopy and differential scanning calorimetry, we probed the effects of WS2 NT addition on the structure of the PLA films at various stages of processing (unstretched, stretching, annealing). We found that 0.6 wt% of WS2 induces the same level of crystallinity in as stretched PLA-WS2 as annealing in neat PLA for 10 min. These data provide useful insights into the role of WS2 NTs on the structural evolution of PLA-WS2 composites under uniaxial deformation, and extend their applicability to situations where fine tuning of PLA crystallinity is desirable.

Real-time structural evolution at the interface of an organic transistor during thermal annealing

2014 ◽  
Vol 2 (17) ◽  
pp. 3390-3400 ◽  
Author(s):  
Timothy C. Anglin ◽  
Austin P. Lane ◽  
Aaron M. Massari
Keyword(s):  
Real Time ◽  
Thermal Annealing ◽  
Structural Evolution ◽  
Organic Transistor

Real-time X-ray scattering studies of film evolution in high performing small-molecule–fullerene organic solar cells

2015 ◽  
Vol 3 (16) ◽  
pp. 8764-8771 ◽  
Author(s):  
Sebastian Engmann ◽  
Felicia A. Bokel ◽  
Andrew A. Herzing ◽  
Hyun Wook Ro ◽  
Claudio Girotto ◽  
...  
Keyword(s):  
Solar Cells ◽  
Real Time ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Structural Evolution ◽  
X Ray ◽  
High Performing ◽  
X Ray Scattering ◽  
Comprehensive Studies ◽  
Ray Scattering

Comprehensive studies of the influence of the formulation additive 1,8-diiodooctane on the structural evolution of small molecule BHJ films with GIWAXS and GISAXS are presented.

scholarly journals Structural evolution of ZnO/sapphire(001) heteroepitaxy studied by real time synchrotron x-ray scattering

2000 ◽  
Vol 77 (3) ◽  
pp. 349-351 ◽  
Author(s):  
Sang Il Park ◽  
Tae Sik Cho ◽  
Seok Joo Doh ◽  
Jong Lam Lee ◽  
Jung Ho Je
Keyword(s):  
Real Time ◽  
Structural Evolution ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Structural evolution of OBC/carbon nanotube bundle nanocomposites under uniaxial deformation

RSC Advances ◽  
2015 ◽  
Vol 5 (42) ◽  
pp. 32909-32919 ◽  
Author(s):  
Siduo Wu ◽  
Guangsu Huang ◽  
Jinrong Wu ◽  
Feng Tian ◽  
Hui Li
Keyword(s):  
Carbon Nanotube ◽  
Block Copolymer ◽  
Structural Evolution ◽  
Uniaxial Deformation ◽  
Long Period ◽  
Solution Blending ◽  
Nanotube Bundle ◽  
Evolution Trend ◽  
Neat Matrix

A regulated morphology of multi-walled CNT bundles in an olefin block copolymer matrix is achieved via solution blending after sonication. We observed an unexpected inverse evolution trend of long period in nanocomposites compared to that in neat matrix.

scholarly journals On the question of two-step nucleation in protein crystallization

2015 ◽  
Vol 179 ◽  
pp. 41-58 ◽  
Author(s):  
Andrea Sauter ◽  
Felix Roosen-Runge ◽  
Fajun Zhang ◽  
Gudrun Lotze ◽  
Artem Feoktystov ◽  
...  
Keyword(s):  
Real Time ◽  
Intermediate Phase ◽  
Early Stage ◽  
Protein Crystallization ◽  
Structural Evolution ◽  
Equation Model ◽  
Nucleation Mechanism ◽  
Crystal Nucleation ◽  
Time Study ◽  
Nucleation Kinetics

We report a real-time study on protein crystallization in the presence of multivalent salts using small angle X-ray scattering (SAXS) and optical microscopy, focusing particularly on the nucleation mechanism as well as on the role of the metastable intermediate phase (MIP). Using bovine beta-lactoglobulin as a model system in the presence of the divalent salt CdCl2, we have monitored the early stage of crystallization kinetics which demonstrates a two-step nucleation mechanism: protein aggregates form a MIP, which is followed by the nucleation of crystals within the MIP. Here we focus on characterizing and tuning the structure of the MIP using salt and the related effects on the two-step nucleation kinetics. The results suggest that increasing the salt concentration near the transition zonepseudo-c** enhances the energy barrier for both MIPs and crystal nucleation, leading to slow growth. The structural evolution of the MIP and its effect on subsequent nucleation is discussed based on the growth kinetics. The observed kinetics can be well described, using a rate-equation model based on a clear physical two-step picture. This real-time study not only provides evidence for a two-step nucleation process for protein crystallization, but also elucidates the role and the structural signature of the MIPs in the nonclassical process of protein crystallization.

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