Features of Crystallographic Texture and Residual-Stresses’ Formation in Titanium VT22 Alloy under Combined Action of Intensive Thermomechanical Processing and Rapid Heating

Karasevska, О. P.; Markovsky, P.E.; Antonyuk, S. L.; Havrysh, І. М.

doi:10.15407/mfint.38.05.0617

Cited by 1 publication

(1 citation statement)

References 6 publications

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“…In both vulcanized and unvulcanized NR, the mechanism of SIC was thought to be that the short chains between the network crosslinking points are fully stretched and become the oriented crystal nuclei. The coiled chains around them were then partially aligned parallel to the nucleus to form a highly oriented crystallite. − Unlike NR, unvulcanized TKS rubber did not exhibit the SIC phenomenon. When both rubbers were purified with acetone under the same conditions and vulcanized, TKS rubber exhibited mechanical properties and SIC comparable to NR.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Taraxacum kok-saghyz Rubber and Biofuel Ethanol Simultaneously by the Yeast Fermentation Process

Zhao

Xiang

et al. 2023

ACS Omega

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Taraxacum kok-saghyz (TKS) rubber is considered the most ideal alternative source of natural rubber (NR). Extracting rubber from TKS with high quality, low cost, and low pollution is the basis of commercial development. The TKS roots were subjected to morphological observation and detailed compositional analysis. Scanning electron microscopy (SEM) images confirm that rubber filaments are physically entangled with plant tissues due to differences in molecular polarity. Compared with the traditional solvent TKS rubber extraction process, a new rubber extraction process developed in this study, namely, the microbial extraction (″ME″) process, is less harmful to the environment and lower in cost. The ″ME″ process is divided into three steps: dilute acid pretreatment process, enzyme degradation process, and fermentation process. After each step is completed, the purity of TKS rubber will gradually increase from 84.8% to 93.8 to 95.5%. The TKS rubber finally obtained fully meets the requirements of the traditional rubber industry, especially the tire industry. Besides, the yield of biofuel ethanol, a by-product of cellulose fermentation, reaches 2.05 g/100 g of TKS roots (dry weight), which can effectively reduce the production cost of TKS rubber. In the rubber extraction process, microorganisms have little effect on the quality of TKS rubber. The results show that the molecular weight and chemical structure of TKS rubber is very close to NR, so the ″ME″ process can be used as a new method for large-scale extraction of TKS rubber.

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