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Yang J, Shen A, Velankar SS. The preparation and thermomechanical properties of high‐temperature foams based on thermoplastic poly(phthalazinone ether ketone). J Appl Polym Sci 2021. [DOI: 10.1002/app.49699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Junyu Yang
- Department of Chemical and Petroleum Engineering University of Pittsburgh Pittsburgh Pennsylvania USA
| | - Aaron Shen
- Dalian Join King Fine Chemical Co. Ltd. Dalian China
| | - Sachin S. Velankar
- Department of Chemical and Petroleum Engineering University of Pittsburgh Pittsburgh Pennsylvania USA
- Department of Mechanical Engineering and Materials Science University of Pittsburgh Pittsburgh Pennsylvania USA
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Matsuo M, Bin Y. Education program for controversial defect of recent X-ray instrument termed as a simultaneous small angle X-ray scattering and wide angle X-ray diffraction measuring instrument. PURE APPL CHEM 2018. [DOI: 10.1515/pac-2017-0801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Simultaneous rotations of sample and X-ray detected counter are needed to evaluate orientation distribution of crystallites and amorphous chains oriented predominantly parallel to the film surface in addition to exact diffraction peak profiles obtained without the complicated intensity corrections. The rotation mode is known as “θ–2θ scanning” system (θ: film, 2θ: counter). The system has been mainly used in research and development institutes. However, such instruments are not produced at present. Recently, small angle X-ray scattering (SAXS) and wide angle X-ray diffraction (WAXD) intensities have been measured by using X-ray beam generated along one direction. The brand name of the instrument is “a simultaneous SAXS and WAXD measuring instrument”. The X-ray beam generated by the instrument has surely high luminance providing high degree resolution of peak profiles by diffraction and/or scattering. The sample stage and detector, however, are fixed, since the intensities for SAXS and WAXD are obtained by the digital display of the number of X-ray photons detected on the imaging plate. Such optical system contains controversial defect on evaluating orientation of crystal planes parallel to the surface of films prepared by T-die and inflation methods as well as the exact profile. The imaging plate cannot detect the diffraction intensity from the crystal planes existing in the angle range between incident beam and Bragg angle associated with the diffraction peak position of the individual crystal planes.
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Affiliation(s)
- Masaru Matsuo
- Department of Polymer Science and Materials , Dalian University of Technology , Dalian 116024 , P. R. China
| | - Yuezhen Bin
- Department of Polymer Science and Materials , Dalian University of Technology , Dalian 116024 , P. R. China
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Study of the structural orientation and mechanical strength of the electrospun nanofibers from polymers with different chain rigidity and geometry. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2073-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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