Viscometric Temperature Sensitivity of Engine Lubricants at Low Temperature and Moderately High Shear Conditions

2009 ◽  
pp. 14-14-21
Author(s):  
Kenneth O. Henderson ◽  
C. Patrick Maggi
Keyword(s):  
Low Temperature ◽  
Temperature Sensitivity ◽  
High Shear

Viscometric Temperature Sensitivity of Engine Lubricants at Low Temperature and Moderately High Shear Conditions

2007 ◽  
Vol 4 (10) ◽  
pp. 100894 ◽  
Author(s):  
Kenneth O. Henderson ◽  
C. Patrick Maggi ◽  
Simon Tung ◽  
Bernard Kinker ◽  
Mathias Woydt ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Sensitivity ◽  
High Shear

scholarly journals Study on Performance Damage and Mechanism Analysis of Asphalt under Action of Chloride Salt Erosion

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3089
Author(s):  
Peilei Zhou ◽  
Wensheng Wang ◽  
Lili Zhu ◽  
Haoyun Wang ◽  
Yongming Ai
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
High Temperature ◽  
Low Temperature ◽  
Temperature Sensitivity ◽  
Salt Solution ◽  
Solution Concentration ◽  
Chloride Salt ◽  
Temperature Performance ◽  
Low Temperature Performance

This study aims to investigate the performance evolution and mechanism of asphalt under action of chloride salt erosion. Asphalt samples soaked with five different snow melting chloride salt concentrations were taken as the research object. Then, the high-temperature performance, low-temperature performance, temperature sensitivity and asphalt–aggregate adhesion property of asphalt samples were carried out. Additionally, Fourier transform infrared spectroscopy (FTIR) was used to explore the mechanism of chloride salt erosion on asphalt. Test results showed the linear variation relationships of high-temperature performance, low-temperature performance and temperature sensitivity with chloride salt concentrations. The high-temperature performance of asphalt would be improved by chloride snowmelt salt. With the increase in the chloride salt solution concentration, the low-temperature performance of asphalt became worse, and the temperature sensitivity increased. Moreover, after the effect of the chloride salt solution, the asphalt–aggregate adhesion property decreased with the increase in the chloride salt solution concentration. It is necessary to control the amount of chloride snowmelt salt in the actual snow removal projects. Finally, based on Fourier transform infrared spectroscopy, the mechanism of chloride salt erosion on asphalt was preliminarily explored. With the increase in the chloride salt solution concentration, the proportion of light components (saturated fraction, aromatic fraction) in asphalt decreased, and the proportion of heavy components (resin and asphaltene) with good thermal stability increased.

Fiber interferometry with low temperature sensitivity

2020 ◽  
Author(s):  
Zitong Feng ◽  
Vincent Michaud-Belleau ◽  
Jayanta K. Sahu ◽  
Johan Nilsson ◽  
Christophe A. Codemard ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Sensitivity

Microwave-Vacuum Integrated Cavity with a Low Temperature Sensitivity for Cs Fountain Clocks

2021 ◽  
Author(s):  
Fasong Zheng ◽  
Fang Fang ◽  
Weiliang Chen ◽  
Kun Liu ◽  
Shaoyang Dai ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Sensitivity

Application of FBG Strain Sensor with Low Temperature Sensitivity in Static Pressure PHC Pipe Pile Penetration Test

2018 ◽  
Vol 55 (4) ◽  
pp. 040602
Author(s):  
王永洪 Wang Yonghong ◽  
张明义 Zhang Mingyi ◽  
张春巍 Zhang Chunwei ◽  
白晓宇 Bai Xiaoyu ◽  
刘倩 Liu Qian
Keyword(s):  
Low Temperature ◽  
Temperature Sensitivity ◽  
Static Pressure ◽  
Strain Sensor ◽  
Penetration Test ◽  
Pipe Pile ◽  
Pile Penetration

Low-temperature sensitivity periodically tapered photonic crystal-fiber-based refractometer

2013 ◽  
Vol 38 (19) ◽  
pp. 3795 ◽  
Author(s):  
Pengfei Wang ◽  
Lin Bo ◽  
Chunying Guan ◽  
Yuliya Semenova ◽  
Qiang Wu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Low Temperature ◽  
Photonic Crystal Fiber ◽  
Temperature Sensitivity ◽  
Crystal Fiber

Crystallizable Trans-Butadiene-Piperylene Elastomers

1978 ◽  
Vol 51 (5) ◽  
pp. 907-924 ◽  
Author(s):  
M. Bruzzone ◽  
A. Carbonaro ◽  
L. Gargani
Keyword(s):  
Glass Transition ◽  
Melting Point ◽  
Low Temperature ◽  
Temperature Sensitivity ◽  
General Purpose ◽  
Strain Sensitivity ◽  
Rational Utilization ◽  
Green Strength ◽  
Synthetic Rubber ◽  
Vanadium Based Catalysts

Abstract The synthesis of a crystallizable synthetic rubber based on butadiene and piperylene in the presence of active vanadium-based catalysts is described. This outlet for piperylene (a cocomponent with isoprene of the C5 cut of naphtha crackers) would allow a rational utilization of both monomers present in the same cut and draw the best advantage from the complementary properties of the copolymer described in this work and cis-1,4-polyisoprene. The butadiene units in the copolymer are in the trans-1,4-configuration. The piperylene content giving a good compromise between crystallization at low temperature (temperature sensitivity) and crystallization upon stretching (strain sensitivity) is 30 ± 5 mol%. The copolymer shows outstanding green strength and tack, and it is less prone than high-cis-polybutadiene and trans-polypentenamer to crystallization at low temperature, because of a particular combination of thermodynamic parameters. Among these, melting point and glass transition are somewhat adjustable by controlling the piperylene content in the range specified. The properties of this crystallizable rubber suggest its use as a general-purpose rubber, possibly in combination with other conventional elastomers.

Thermal Adaptation of Pennisetum: Leaf Structure and Composition

1977 ◽  
Vol 4 (4) ◽  
pp. 541 ◽  
Author(s):  
CJ Pearson ◽  
DG Bishop ◽  
M Vesk
Keyword(s):  
Low Temperature ◽  
Temperature Sensitivity ◽  
Thermal Adaptation ◽  
Chloroplast Ultrastructure ◽  
Lipid Phase ◽  
Genotypic Differences ◽  
Lipid Phase Transitions ◽  
Chlorophyll Accumulation ◽  
Chlorophyll Distribution ◽  
Lower Temperature

Studies were made of the effects of growth temperatures and transition to colder temperature on chloroplast ultrastructure, chlorophyll accumulation, lipids and protein of two Pennisetum americanum cultivars and a P. americanum × P. purpureum biotype which differed in temperature sensitivity. All genotypes had structure and chlorophyll distribution consistent with NADP-malic enzyme C4 systems and lipid phase transitions at temperatures similar to those of other 'chilling-sensitive' plants. All accumulated less starch at low temperature and there was mobilization of starch, aggregation of thylakoids in mesophyll chloroplasts and swelling of loculi on transition from 24/19 to 18/13°C. Intolerance of Pennisetum to low temperature was clearly not due to accumulation of starch, nor were genotypic differences in temperature sensitivity related to starch. The cold susceptibility of cv. Ingrid Pearl, in contrast with the tolerance of the intraspecific and interspecific hybrids, was associated with inability to accumulate chlorophyll in the mesophyll of some leaves; fluctuations in chlorophyll a/b ratios within 5 days of transition to lower temperature; and inability to accumulate higher concentrations of soluble proteins in apparently normal leaves grown at 18/13°C. Genotypic differences in temperature sensitivity did not appear related to the physical properties of membranes, which did not change within 5 days of transition to 18/13°C.

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