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What is the meaning, pronunciation and online translation of couplant

Superplasticizer Powder 2021-06-21 09:12 56
Coupling agent

1.2 axis shear wave, gap scanning, automatic coupling agent monitoring, automatic contour change compensation 26nbsp;% 26nbsp;% 26nbsp; The purpose of this study is to overcome the compatibility between polyimide and multiwalled carbon nanotubes (MWNTs). Therefore, the MWNTs were pretreated with mixed acid (H2SO4: HNO3 = 3:1, vol%), The carboxylic acid group was grafted on the surface of carbon nanotubes by ultrasonic vibration. The coupling agent was used to react with the precursor PAA of polyimide, and then the carbon nanotubes containing carboxylic acid group were introduced into the composite material of alkoxysilane terminated amino acid / mwnt-cooh by covalent bonding, Then, the polyimide carbon nanotube composite film was prepared by spin coating and thermal curing 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp; In this research,MWNTs were modified by mix acid(H2SO4:HNO3=3:1, vol%) under sonication for pretreatment to overcome the compatibility between polyimide and carbon nanotubes. The MWNTs were grafted with carboxylic groups on the wall of the tubes. Besides, APrTEOS was introduced as coupling agent. With ethoxysilane group, it can react with precursor of polyimide, which then combined with modified carbon nantubes to form covalent bond. The PI/MWNTs composites were obtained by a spin coating and multi-step thermal curing process. In this study, The MWNTs were introduced into the matrix in order to increase its electrical and mechanical properties 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp; Fujifilm's PSHC (Pure, Stable and High-performance dye-forming Coupler) Technology gives it high color purity, stability and color formation efficiency, This technology forms the basis for the film's high color saturation performance 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp; Continuous couplant monitoring by flow sensor and ultrasonically.

5 Results 83 cases of early ectopic pregnancy were diagnosed by transvaginal color Doppler ultrasound, 79 cases were confirmed by operation and pathology, the diagnostic coincidence rate was 95.2% 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp;% 26nbsp;% 26 26nbsp;% 26nbsp;% 26nbsp; Methods〕

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