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Online since: January 2013
Authors: Ying Yu, Yu Xin Zuo, Zhao Zhang, Chun Cheng Zuo
Morphology Transition of Diblock Copolymer with Nanoparticles Confined in Cylindrical Nanopores Ying YU1, a, Yuxin ZUO1, b, Zhao ZHANG1, c and Chuncheng ZUO1, d 1 College of Mechanical Science and Engineering, Jilin University, Changchun, 130025, China ayuying11@mails.jlu.edu.cn, bzuoyx11@jlu.edu.cn, czhaozhang11@mails.jlu.edu.cn, dzuocc@jlu.edu.cn Keywords: diblock copolymer, morphology transition, self-assembly, nanoparticles Abstract.
Coarse-grained molecular dynamics simulations on self-assembly behavior of diblock copolymers (DCP) with nanoparticles confined in cylindrical nanopores are perfomed to study the morphology transition of DCP affected by the confined ratio of the cylindrical confinement diameter to the block copolymer domain spacing, the wall-polymer interactions, the particle-polymer interaction potential and the component concentration.
Introduction A cylindrical confinement has been proved to have a significant influence on the morphology transition of DCP.Another important factor affecting morphology transition is the nanoparticles(NPs) added to the self-assembly system.
The attractive potential used to model the equilibrium properties of DCP melts is the Lennard- Jones potential which is cut and shifted at different values from that presented in Eq. 3
Online since: January 2022
Authors: Tatiana Kozlova
Therefore, the issue of investigating and modernizing mechanical, physical and technological properties of steels remains highly relevant [1].
The introduction of hydrogen into the structure of austenitic stainless steel affects their properties in a multifaceted way.
Currently, the question of changing the properties of steels under operating conditions at low temperatures is very relevant.
Hydrogen introduced into metal can radically change its properties.
One of the factors that reduces the energy of the steel packaging defects and contributes to phase transitions is the test temperature.
Online since: September 2011
Authors: Ji Jie Zeng, An Hui Cai, Xiao Song Li
Different processing liquid for processing, the depth of residual stress generated is much the same, but closer to the surface, the worse the cooling capacity (quench degrees) and surface physical properties of processing fluids, the greater the residual stress.
In this paper, Under different processing conditions, the distribution of EDM surface residual stress often used by cold-working die steel (Cr12MoV)during mold manufacturing is investigated and the influence factors and causes is analyzed, and proposed measures to reduce the residual stress.
In summary, the distribution of residual stress is not solely determined by the discharge energy put into between the electrodes, when the discharge current peaks and the combination of pulse width is not the same, discharge current peak value will affect the surface residual stress, and pulse width will affect the depth of distribution of the stress.
After two kinds of processing liquid processing of the reason why there are differences between the residual stress distribution is due to the different cooling capacity (quench degrees) and surface physical properties.
(3) Different processing fluids for EDM, the depth of residual stress generated is much the same, but closer to the surface, the worse the cooling capacity (quench degrees) and surface physical properties of processing fluids, the greater the residual stress
Online since: February 2007
Authors: Fa Guang Leng, Wei Wen Li, Feng Xing
Introduction Concrete cracks not only affect the bearing capacity of structure, but affect its durability greatly.
To spread and apply this Cemfiber well at home, the paper does experimental research on the properties of cracking resistance of Cemfiber.
The main physical mechanical properties of DF fiber and Cemfiber are shown in Table1 and Table 2 respectively.
The properties of cracking resistance of reinforced mortar improve lineally with the increasing of the content of Cemfiber.
Many factors may add the shrinkage and lead to crack, such as high cement or water content, due to the increase of the amount and the tensile stress of the capillary.
Online since: November 2013
Authors: Wen Jian Weng, Meng He, Kui Cheng
Introduction Surface structure was identified as one of crucial factors particularly important for bone implant.
As preliminary knowledge, wettability and surface roughness affect cell response synergistically even though how to affect is not explicit[1].
Our previous work showed that nano structured TiO2 had excellent properties of proteins adsorption and cytocompatibility, as well as innovative application in cell sheet technology[9].
Wettability is one of most important factors that dominate cell response to the surface of materials.
As an interface between substrate and adhesive cells, mechanical stability of films is significant requirement.
Online since: June 2022
Authors: Mohammed Hamza Al-Maamori, Rola Abdul Al Khader Abbas
If the material was proved to have the shape memory effect (SME) property, then it will be allowed to predict many thermo-mechanical properties.
So the method of showing the shape memory effect property (i.e. the programming method) gives the material science researcher and engineer a kind of independence and dispensation from the need for the chemists in the production of various polymers in their thermo-mechanical properties [6].
Therefore, many researchers have worked on the necessity of conducting extensive studies on the programming cycles of all types in order to get deeply in understanding their conditions, work basics, and the circumstances affecting them.
Before the yield point, this material show the properties of elasticity, and after the yield point, the properties of plasticity appear.
Darmawan, "Mechanical properties and curing characteristics of shape memory natural rubber", IOP Conference Series: Materials Science and Engineering, 541 (2019): 012012(1-6)
Online since: October 2012
Authors: Baralu Jagannatha Rashmi, Daniela Rusu, Kalappa Prashantha, Marie France Lacrampe, Patricia Krawczak
The concentration of chain extender, blowing agent (BA) and surfactant were varied and their effects on physical, mechanical and morphological properties of foams were investigated.
Properties of prepared foams.
It is generally known that the mechanical properties of a cellular material mainly depend on its density.
The concentration of chain extender, blowing agent and surfactant were varied and their effects on physical, mechanical and morphological properties of foams were investigated.
W J Seo, H C Jung, J C Hyun, W N Kim, Y-B Lee, K H Choe, S-B Kim, Mechanical, morphological, and thermal properties of rigid polyurethane foams Blown by Distilled Water, J.
Online since: May 2012
Authors: Wei Zheng, Yong Wang, Guo Gang Chen, Chao Hui Zhang, Tao Jin
That is, the water is an important factor that causes the slope loose stability.
Through experiment data calculation, the sliding surface parameters can be achieved in table (Table 1) as follows: Table 1 Calculation Parameters Type Unit weight (kN/m-3) Natural strength parameters Strong rainfall parameters  Natural Strong rainfall Strong weathered silt mudstone 21.5 22.5 60 29 15 18 Middle weathered fined sandstone 25.5 25.5 90 32 60 26 Sliding surface 21.5 22.5 10 12 8 9 Influence Factors According to topography and geomorphology of this landslide, geological conditions etc, main influence factors about landslide stability can be follows: (1) Free faces and gullies exist in the slope. (2) Upper loose soil stratum has properties of bad degree of consolidation, water softening etc. (3) Impact of both regional tectonic and rivers cutting normally exist.
Fig. 2 Stability calculation model of bedding landslide slope The relative selection of physical and mechanical parameters, which are used to get the safety factors of design by Eq. 1 and Eq. 2 under strong rainfall condition, for instance, safety factors are shown in Table 2.
Table 2 Safety Factors Slope specifications Landslide design Geo-Slope Natural Strong rainfall Natural Strong rainfall Natural Strong rainfall O B J M O B J M 1.01 0.84 0.96 0.80 0.94 0.95 0.94 0.78 0.81 0.78 Annotation: 1.
[2] LiW.G, Analysis of Affecting Factors of Along-Bed Landslide of Rock Mass and Its Stability Under a Rainfall Condition, Ground Pressure and Strata Control, Vol. 23 (4), ( 2006).
Online since: December 2006
Authors: Dong Ming Yan, Gao Lin
But majority of the available documents concerning the dynamic properties of concrete do not take initial static load into consideration.
But Majority of available documents concerning the dynamic properties of concrete does not take the initial static loads into consideration.
It is necessary to find out whether and how the initial load influences the rate-dependent properties of concrete in dynamic loadings.
To fully understand the mechanical behaviors of the material, more tests must be conducted corresponding to the range of strain rates and loading paths encountered in the applications of interest.
Factors affecting the relationship between rate of loading and measured compressive strength of concrete.
Online since: May 2015
Authors: Jiří Janovec, Petr Ducháček
., creep temperature), cause diffusive processes affecting the structural stability, and mechanical properties of the welds.
The use of Regulations VGB as a comparison standard showed that the hardness properties of variant No. 1 were superior than variant No. 2 which exceeded the allowed VGB hardness values.
In addition, the presence of diffusion-affected zones, especially carburized zones, were observed.
Differences in mechanical properties in different regions of the heterogeneous welded joints result from these thermodynamic processes.
An important factor that can affect the stability of heterogeneous welded joints is the use of suitable consumables, which can significantly reduce the effects of any alloying element concentration gradient in the base material as demonstrated in variant No. 1.
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