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A cryo-bulge apparatus for in situ weather balloon crystallization capturing during blowing by synchrotron radiation x-ray scattering

文献类型： 外文期刊

作者： Chen, Pinzhang 1 ; Xia, Zhijie 1 ; Luo, Yongyue 4 ; Chen, Wei 1 ;

作者机构： 1.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Peoples R China

2.Univ Sci & Technol China, Anhui Prov Engn Lab Adv Funct Polymer Film, CAS Key Lab Soft Matter Chem, Hefei 230026, Peoples R China

3.Shanghai Aircraft Design & Res Inst, Mat Engn Dept, Jinke Rd 5188, Shanghai 201210, Peoples R China

4.Chinese Acad Trop Agr Sci CATAS, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China

期刊名称：REVIEW OF SCIENTIFIC INSTRUMENTS （ 影响因子：1.6； 五年影响因子：1.7 ）

ISSN： 0034-6748

年卷期： 2022 年 93 卷 5 期

页码：

收录情况： SCI

摘要： A cryo-bulge apparatus, which can be directly installed in the synchrotron radiation x-ray scattering beamline, is designed and manufactured. Using the cryo-bulge apparatus, the crystallization of natural rubber during blowing can be captured in situ. For mechanical measurements, the rubber film is tightly clamped at the periphery of a circular window. A low temperature measurement is achieved by the presence of a large iron block, which ensures low temperature variation (<+/- 2 degrees C in 1 h) during x-ray data acquisition. Since the incident x-ray beam passes through the top-most position of the rubber film, the information obtained by the current equipment is essentially under an equibiaxial deformation mode. Owing to precisely controlled internal pressure and temperature, the crystallization of rubber can be observed in situ by wide-angle x-ray scattering. The onset of crystallization is observed at a temperature T < 0 degrees C with an internal pressure P > 21 kPa. This suggests that the crystallization of rubber during blowing can occur under the equibiaxial deformation condition at low temperatures. The power scaling law is found to be 0.52%/kPa. The cryo-bulge apparatus is capable of clarifying the microstructural evolution of rubber during multi-dimensional deformation, which can provide guidance for the optimization of a weather balloon.

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