Study on structure and property relations of α-iPP during uniaxial deformation via in situ synchrotron SAXS/WAXS and POM investigations

2017 ◽  
Vol 58 (2) ◽  
pp. 160-169
Author(s):  
Yingrui Shang ◽  
Puqing Ning ◽  
Yao Zhang ◽  
Feifei Xue ◽  
Ziwei Cai ◽  
...  
Keyword(s):  
Uniaxial Deformation ◽  
Structure And Property ◽  
Property Relations ◽  
Synchrotron Saxs

Structure and property relations between the polyacrylonitrile-based prestabilized fibers and the partially carbonized fibers

2011 ◽  
pp. n/a-n/a
Author(s):  
Meijie Yu ◽  
Yong Xu ◽  
Chengguo Wang ◽  
Bo Zhu ◽  
Yanxiang Wang ◽  
...  
Keyword(s):  
Structure And Property ◽  
Property Relations

In Situ Biaxial Mechanical Testing at the Neutron Time-of-Flight Diffractometer POLDI

2013 ◽  
Vol 768-769 ◽  
pp. 60-65 ◽  
Author(s):  
Julia Repper ◽  
Markus Niffenegger ◽  
Steven van Petegem ◽  
Werner Wagner ◽  
Helena van Swygenhoven
Keyword(s):  
Steel Sample ◽  
Mechanical Tests ◽  
Image Correlation ◽  
Uniaxial Deformation ◽  
Spatially Resolved ◽  
Neutron Diffractometer ◽  
Neutron Time ◽  
Strain Paths ◽  
Biaxial Mechanical Testing

Complex strain paths are often applied to materials during production processes. This paper shows the first successful in-situ biaxial mechanical tests during neutron diffraction performed on a cruciform steel sample and reports on the differences compared to uniaxial deformation. Digital image correlation is demonstrated to be an appropriate tool to monitor spatially resolved the macroscopic straining. The new, modular biaxial machine that will be installed at the neutron diffractometer POLDI is presented.

In situ study of skim milk structure changes under high hydrostatic pressure using synchrotron SAXS

2018 ◽  
Vol 77 ◽  
pp. 772-776 ◽  
Author(s):  
Zhi Yang ◽  
Qinfen Gu ◽  
Weam Banjar ◽  
Na Li ◽  
Yacine Hemar
Keyword(s):  
Hydrostatic Pressure ◽  
High Hydrostatic Pressure ◽  
Skim Milk ◽  
In Situ Study ◽  
Structure Changes ◽  
Synchrotron Saxs

Research of In Situ Polymerization and Core-Shell Structure Modified Emulsified Asphalt

2011 ◽  
Vol 71-78 ◽  
pp. 928-931
Author(s):  
Jin Liang Wu ◽  
Yong Xing Zhang ◽  
Chun Sun Zhang
Keyword(s):  
Shell Structure ◽  
In Situ Polymerization ◽  
Core Shell ◽  
Asphalt Emulsion ◽  
Sound Effect ◽  
Structure And Property ◽  
Modified Asphalt ◽  
Core Shell Structure ◽  
Emulsified Asphalt

Nowadays, there are dominantly two ways of producing modified emulsified asphalt ,one of which is to emulsify modified asphalt, the other to modify asphalt emulsion. But they have the same defect that modifier cannot be evenly mixed with asphalt emulsion, which has side effect on the performance of modified emulsified asphalt. The emulsified asphalt and modifier have different traits in structure and property. In order to make the modifier disperse in asphalt emulsion evenly to improve the performance of modified emulsified asphalt, a tentative idea is brought forward: we shall utilize in-situ polymerization and core-shell structure to enhance feature of emulsified asphalt. Core-shell structure is a method of synthesizing composite material, which can assist to achieve sound effect of the two kinds of materials. The point to emphasize is, in this paper, the introduction and feasibility of the method, its specialty against current mainly methods, the difficulties encountered in practice as well as its promising prospect and the anticipated target to achieve will all be illustrated.

Synthesis and properties of low coefficient of thermal expansion copolyimides derived from biphenyltetracarboxylic dianhydride with p-phenylenediamine and 4,4′-oxydialinine

e-Polymers ◽  
2016 ◽  
Vol 16 (4) ◽  
pp. 295-302 ◽  
Author(s):  
Yonglin Lei ◽  
Yuanjie Shu ◽  
Jinhua Peng ◽  
Yongjian Tang ◽  
Jichuan Huo
Keyword(s):  
Thermal Stability ◽  
Thermal Expansion ◽  
Coefficient Of Thermal Expansion ◽  
Thermomechanical Analysis ◽  
Amic Acid ◽  
Molar Ratio ◽  
Structure And Property ◽  
Property Relations ◽  
Ft Ir ◽  
Biphenyltetracarboxylic Dianhydride

AbstractA series of copolyimides were prepared by thermal imidization of poly(amic acid)s (PAAs) derived from 3,3′,4,4′-biphenyltetracarboxylic dianhydride (s-BPDA), 2,3′,3,4′-biphenyltetracarboxylic dianhydride (a-BPDA), p-phenylenediamine (PDA) and 4,4′-oxydialinine (4,4′-ODA) commonly used for the production of commercial polyimides. The flexible copolyimide films were obtained from that the molar ratio of s-BPDA, a-BPDA, PDA and 4,4′-ODA was 9:1:8:2 (Co-PIs-3), 8:2:9:1 (Co-PIs-5) and 8:2:8:2 (Co-PIs-6). These obtained copolyimide films were characterized by Fourier transform-infrared spectroscopy(FT-IR), wide angle X-ray (WAXD), Thermogravimetric (TG), dynamic mechanical thermal analysis (DMA), thermomechanical analysis (TMA), field-emission scanning electron microscopy (FE-SEM) and mechanical properties measurement. The results showed that three copolyimides remained semi-crystalline and exhibited high glass transition temperature (Tg), high thermal stability, great ultimate tensile strength and low coefficient of thermal expansion (CTE). The Co-PIs-5 had lower crystallinity, lower CTE, greater elongation at break, higher Tg and thermal stability and the greater dense extent, compared with Co-PIs-3 and Co-PIs-6. Structure and property relations of the prepared polyimides were also briefly discussed. The results revealed that the copolymerization of s-BPDA/PDA with a small number of 4,4′-ODA/a-BPDA was a useful means for enhancing flexibility without sacrificing low CTE.

An in-situ simultaneous SAXS and WAXS survey of PEBAX® nanocomposites reinforced with organoclay and POSS during uniaxial deformation

Polymer ◽  
2012 ◽  
Vol 53 (15) ◽  
pp. 3360-3367 ◽  
Author(s):  
Tahseen Kamal ◽  
Soo-Young Park ◽  
Myong-Chan Choi ◽  
Young-Wook Chang ◽  
Wei-Tsung Chuang ◽  
...  
Keyword(s):  
Uniaxial Deformation

In situ synchrotron SAXS/WAXD studies during melt spinning of modified carbon nanofiber and isotactic polypropylene nanocomposite

2004 ◽  
Vol 282 (8) ◽  
pp. 802-809 ◽  
Author(s):  
Shaofeng Ran ◽  
Christian Burger ◽  
Igors Sics ◽  
Kyunghwan Yoon ◽  
Dufei Fang ◽  
...  
Keyword(s):  
Isotactic Polypropylene ◽  
Melt Spinning ◽  
Carbon Nanofiber ◽  
Synchrotron Saxs

In-situ synchrotron SAXS and WAXS investigations on deformation and α–β transformation of uniaxial stretched poly(vinylidene fluoride)

CrystEngComm ◽  
2013 ◽  
Vol 15 (8) ◽  
pp. 1597 ◽  
Author(s):  
Huilong Guo ◽  
Yao Zhang ◽  
Feifei Xue ◽  
Ziwei Cai ◽  
Yingrui Shang ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride ◽  
Synchrotron Saxs

In situ microstructure evolution of oxide dispersion strengthened ferritic steel under uniaxial deformation

2012 ◽  
Vol 428 (1-3) ◽  
pp. 98-102 ◽  
Author(s):  
Yong Seok Choi ◽  
Do Hyun Kim ◽  
Sung-Hwan Kim ◽  
Suk Hoon Kang ◽  
Jinsung Jang ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Ferritic Steel ◽  
Oxide Dispersion Strengthened ◽  
Oxide Dispersion ◽  
Uniaxial Deformation
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