The formation of fibrous structure of polyamide 6 induced by the three‐step forming process and its prominent reinforcement in nitrile rubber

2019 ◽  
Vol 136 (19) ◽  
pp. 47472 ◽  
Author(s):  
Ziqing Cai ◽  
Zhenyu Jia ◽  
Tao Wang
Keyword(s):  
Polyamide 6 ◽  
Nitrile Rubber ◽  
Fibrous Structure ◽  
Forming Process

scholarly journals A study of interface adhesion between polyamide 6 (PA6) and nitrile rubber (NBR)

2014 ◽  
Vol 46 (10-11) ◽  
pp. 1000-1004 ◽  
Author(s):  
Yuan Wang ◽  
Oana Ghita ◽  
Dave Kavanagh ◽  
Duncan Chandler
Keyword(s):  
Polyamide 6 ◽  
Nitrile Rubber ◽  
Interface Adhesion

Microstructure Evolution of Copper Strip during Continuous Extrusion and Rolling Forming

2018 ◽  
Vol 913 ◽  
pp. 277-285
Author(s):  
Xin Bing Yun ◽  
Tian Tian ◽  
Hong Zhan ◽  
Cong Wang ◽  
Ying Zhao
Keyword(s):  
Dynamic Recrystallization ◽  
Microstructure Evolution ◽  
Shear Bands ◽  
Rolling Direction ◽  
Optical Microscope ◽  
Rolling Reduction ◽  
Fibrous Structure ◽  
Forming Process ◽  
Copper Strip ◽  
Continuous Extrusion

During the continuous extrusion and rolling forming process, the microstructure evolution of copper strip was investigated by the optical microscope and transmission electron microscope. The results indicated that the grains in the centre of as-cast rod billet were squashed in the clamping zone and were elongated in the rigid mobile zone. The fibrous structure formed in the upsetting zone. In the adhesion zone, the dynamic recrystallization occurred and the shear band was found. In the right-angle bending zone, the fibrous structure, recrystallized grains and shear bands existed together. The full dynamic recrystallization occurred in the extending extrusion zone. After continuous extrusion forming, the size of the grains of copper strip was larger than that in the extending extrusion zone. After rolling, the grains in copper strip were evidently stretched along the rolling direction, which resulted in the formation of stable direction. With the increase of rolling reduction, the grains were squashed gradually. When the rolling reduction increased from 2 to 6 mm, the tensile strength increased from 250 to 400 MPa, and the elongation decreased from 48% to 13%.

Characterization of crystalline structure and free volume of polyamide 6/nitrile rubber elastomer thermoplastic vulcanizates: Effect of the processing additives

2017 ◽  
Vol 134 (48) ◽  
pp. 45576 ◽  
Author(s):  
Ana Catarina de O. Gomes ◽  
Bluma G. Soares ◽  
Marcia G. Oliveira ◽  
José C. Machado ◽  
Dario Windmöller ◽  
...  
Keyword(s):  
Free Volume ◽  
Crystalline Structure ◽  
Polyamide 6 ◽  
Nitrile Rubber ◽  
Thermoplastic Vulcanizates

Validation of the FEA of a Sheet Metal Forming Process of Composite Material and Steel Foil in Sandwich Design

2015 ◽  
Vol 794 ◽  
pp. 75-80 ◽  
Author(s):  
Nenad Grbic ◽  
Anas Bouguecha ◽  
Milan Vucetic ◽  
A. Neumann ◽  
Tomasz Osiecki ◽  
...  
Keyword(s):  
Composite Material ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Polyamide 6 ◽  
Unidirectional Composite ◽  
Forming Process ◽  
Metal Forming Process ◽  
Reinforced Thermoplastics ◽  
Steel Foils

A multi-material concept in sandwich design using two steel foils and continuous fiber-reinforced thermoplastics represents a promising structural approach to the production of hybrid parts. This contribution deals with the experimental and numerical analysis of a conventional sheet metal forming process using a composite material based on Polyamide 6 (PA6) with unidirectional endless glass fiber reinforcement and HC220Y+ZE steel foil. A unidirectional composite plate is positioned between two steel foils in sandwich design and formed into the hybrid part under appropriate temperature conditions. Afterwards, the forming process is analysed numerically with the software LS-DYNA and for verification of the FEA the geometry of the hybrid part is measured optically with ATOS system of the company GOM.

Oxazoline-functionalized hydrogenated nitrile rubber as impact modifier for polyamide-6

Polymer ◽  
2000 ◽  
Vol 41 (10) ◽  
pp. 3671-3681 ◽  
Author(s):  
J. Pigłowski ◽  
I. Gancarz ◽  
M. Wlaźlak
Keyword(s):  
Polyamide 6 ◽  
Nitrile Rubber ◽  
Impact Modifier

Structures Resembling Striated Rootlets in Oocytes

1972 ◽  
Vol 30 ◽  
pp. 124-125
Author(s):  
Valerie V. Ernst
Keyword(s):  
Golgi Complex ◽  
Fibrous Structure ◽  
Oocyte Development ◽  
The Cross

During the earliest stage of oocyte development in the limpet, Acmea scutum, Golgi complexes are small, few and randomly dispersed in the cytoplasm. As growth proceeds, the Golgi complexes increase in size and number and migrate to the periphery of the cell. At this time, fibrous structures resembling striated rootlets occur associated with the Golgi complexes. Only one fibrous structure appears to be associated with a Golgi complex.The fibers are periodically cross banded with an average of 4 dense fibrils and 6 lighter fibrils per period (Fig. 1). The cross fibrils have a center to center spacing of about 7 run which appears to be the same as that of the striated rootlets of the gill cilia in this animal.

The Potentials of Scanning Microscopy

1968 ◽  
Vol 26 ◽  
pp. 352-353
Author(s):  
A. V. Crewe
Keyword(s):  
Salient Feature ◽  
Secondary Emission ◽  
Resolving Power ◽  
X Rays ◽  
Scanning Microscope ◽  
Forming Process ◽  
Additional Tool ◽  
Detection Systems ◽  
Conventional Microscope ◽  
Present Information

If the resolving power of a scanning electron microscope can be improved until it is comparable to that of a conventional microscope, it would serve as a valuable additional tool in many investigations.The salient feature of scanning microscopes is that the image-forming process takes place before the electrons strike the specimen. This means that several different detection systems can be employed in order to present information about the specimen. In our own particular work we have concentrated on the use of energy loss information in the beam which is transmitted through the specimen, but there are also numerous other possibilities (such as secondary emission, generation of X-rays, and cathode luminescence).Another difference between the pictures one would obtain from the scanning microscope and those obtained from a conventional microscope is that the diffraction phenomena are totally different. The only diffraction phenomena which would be seen in the scanning microscope are those which exist in the beam itself, and not those produced by the specimen.

Microscopy of porous ceramics

1989 ◽  
Vol 47 ◽  
pp. 438-439
Author(s):  
H. M. Kerch ◽  
R. A. Gerhardt
Keyword(s):  
Porous Ceramics ◽  
Specimen Preparation ◽  
High Porosity ◽  
Ion Milling ◽  
Forming Process ◽  
Preparation Methods ◽  
Pore Texture ◽  
Proper Design ◽  
And Function ◽  
Function Information

Highly porous ceramics are employed in a variety of engineering applications due to their unique mechanical, optical, and electrical characteristics. In order to achieve proper design and function, information about the pore structure must be obtained. Parameters of importance include pore size, pore volume, and size distribution, as well as pore texture and geometry. A quantitative determination of these features for high porosity materials by a microscopic technique is usually not done because artifacts introduced by either the sample preparation method or the image forming process of the microscope make interpretation difficult.Scanning electron microscopy for both fractured and polished surfaces has been utilized extensively for examining pore structures. However, there is uncertainty in distinguishing between topography and pores for the fractured specimen and sample pullout obscures the true morphology for samples that are polished. In addition, very small pores (nm range) cannot be resolved in the S.E.M. On the other hand, T.E.M. has better resolution but the specimen preparation methods involved such as powder dispersion, ion milling, and chemical etching may incur problems ranging from preferential widening of pores to partial or complete destruction of the pore network.

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