Simultaneous estimation of the phase content and lamellar thickness in isotactic polypropylene by the simulated annealing of wide-angle X-ray scattering data

2010 ◽  
Vol 117 (4) ◽  
pp. 2386-2394 ◽  
Author(s):  
Gopinath Subramanian ◽  
Rahmi Ozisik
Keyword(s):  
Simulated Annealing ◽  
Isotactic Polypropylene ◽  
Scattering Data ◽  
Simultaneous Estimation ◽  
Lamellar Thickness ◽  
Wide Angle ◽  
Phase Content ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

In-house simultaneous collection of small-angle X-ray scattering, wide-angle X-ray diffraction and Raman scattering data from polymeric materials

2014 ◽  
Vol 47 (3) ◽  
pp. 922-930 ◽  
Author(s):  
Raita Hirose ◽  
Taiyo Yoshioka ◽  
Hiroko Yamamoto ◽  
Kummetha Raghunatha Reddy ◽  
Daisuke Tahara ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Small Angle ◽  
Polymeric Materials ◽  
Scattering Data ◽  
Present System ◽  
Wide Angle ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

An in-house X-ray scattering system, which can simultaneously measure small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD) data, as well Raman scattering data, has been developed to study the phase transitions of polymeric materials. To date, these types of measurements have been limited to synchrotron radiation. The present system is an in-house SAXS system combined with a WAXD detector and a Raman spectrometer. A rotating-anode X-ray generator and multilayer optic are employed to provide a high-flux X-ray beam. Two two-dimensional hybrid pixel detectors are utilized for the rapid-scan time-resolved SAXS and WAXD measurements. The Raman unit consists of a compact probe with a near-infrared excitation laser operating at a wavelength of 1064 nm. This long-wavelength laser produces less fluorescence than conventional excitation lasers with wavelengths of 532 or 785 nm. The performance of this system was tested by investigating the thermally induced ferroelectric phase transition of vinylidene fluoride–trifluoroethylene (VDF-TrFE) copolymers. It has been demonstrated that the combination of SAXS, WAXD and Raman techniques gives useful information for revealing the relationship between the structural change in the crystal lattice and the morphological change in the lamellar stacking mode in polymer samples of complicated hierarchical structure.

Effects of different colorants on morphological development of sheared isotactic polypropylene: A study using synchrotron wide-angle x-ray scattering

2008 ◽  
Vol 103 (12) ◽  
pp. 124906 ◽  
Author(s):  
Peng-wei Zhu ◽  
Jason Tung ◽  
Graham Edward ◽  
Lance Nichols
Keyword(s):  
Isotactic Polypropylene ◽  
Morphological Development ◽  
Wide Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals The Diffraction Pattern Calculator(DPC) toolkit: a user-friendly approach to unit-cell lattice parameter identification of two-dimensional grazing-incidence wide-angle X-ray scattering data

2014 ◽  
Vol 47 (6) ◽  
pp. 2090-2099 ◽  
Author(s):  
Anna K. Hailey ◽  
Anna M. Hiszpanski ◽  
Detlef-M. Smilgies ◽  
Yueh-Lin Loo
Keyword(s):  
Crystal Structure ◽  
Grazing Incidence ◽  
Unit Cell ◽  
Lattice Parameters ◽  
Scattering Data ◽  
Wide Angle ◽  
Two Dimensional ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

TheDPCtoolkit is a simple-to-use computational tool that helps users identify the unit-cell lattice parameters of a crystal structure that are consistent with a set of two-dimensional grazing-incidence wide-angle X-ray scattering data. The input data requirements are minimal and easy to assemble from data sets collected with any position-sensitive detector, and the user is required to make as few initial assumptions about the crystal structure as possible. By selecting manual or automatic modes of operation, the user can either visually match the positions of the experimental and calculated reflections by individually tuning the unit-cell parameters or have the program perform this process for them. Examples that demonstrate the utility of this program include determining the lattice parameters of a polymorph of a fluorinated contorted hexabenzocoronene in a blind test and refining the lattice parameters of the thin-film phase of 5,11-bis(triethylsilylethynyl)anthradithiophene with the unit-cell dimensions of its bulk crystal structure being the initial inputs.

Microstructure characterization in a single isotactic polypropylene spherulite by synchrotron microfocus wide angle X-ray scattering

Polymer ◽  
2018 ◽  
Vol 142 ◽  
pp. 387-393 ◽  
Author(s):  
Baobao Chang ◽  
Konrad Schneider ◽  
Nilesh Patil ◽  
Stephan Roth ◽  
Gert Heinrich
Keyword(s):  
Isotactic Polypropylene ◽  
Microstructure Characterization ◽  
Wide Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

A revisit to the flow and pressure jointly induced thick lamellae in isotactic polypropylene: A synchrotron radiation small‐ and wide‐angle X‐ray scattering study

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Shu‐Gui Yang ◽  
Yue Li ◽  
Zhe Ma ◽  
Jun Lei ◽  
Liangbin Li ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Isotactic Polypropylene ◽  
Wide Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering

Mapping structural gradients in isotactic polypropylene using scanning wide-angle X-ray scattering

Polymer ◽  
2013 ◽  
Vol 54 (7) ◽  
pp. 1867-1875 ◽  
Author(s):  
Håvard Granlund ◽  
Jostein Bø Fløystad ◽  
Morteza Esmaeili ◽  
Eirik Torbjørn Bakken ◽  
Martin Bech ◽  
...  
Keyword(s):  
Isotactic Polypropylene ◽  
Wide Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Reduction of two-dimensional small- and wide-angle X-ray scattering data

2007 ◽  
Vol 40 (s1) ◽  
pp. s423-s427 ◽  
Author(s):  
Peter Boesecke
Keyword(s):  
Scattering Data ◽  
Wide Angle ◽  
Two Dimensional ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering
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