Preparation of Hyper-Branched Polymer and its Application in Synthetic Leather

2010 ◽  
Vol 152-153 ◽  
pp. 1894-1899
Author(s):  
Tao Tao Qiang ◽  
Min Luo ◽  
Xue Chuan Wang ◽  
Long Fang Ren
Keyword(s):  
Molecular Structure ◽  
Electron Microscope ◽  
Water Vapor ◽  
Maleic Anhydride ◽  
Moisture Absorption ◽  
Branched Polymer ◽  
Synthetic Leather ◽  
Finishing Process ◽  
Scanning Electron ◽  
Observation Results

The hyper-branched polymer with terminal carboxyl (HPAE-C) was prepared by modifying hyper-branched polymer with terminal hydroxyl with maleic anhydride. The molecular structure of HPAE-C was characterized by IR, 1H-NMR and 13C-NMR. The HPAE-C was used in the finishing process of microfiber synthetic leather, and its effect on the health properties of microfiber synthetic leather was studied. The results showed that hyper-branched polymer could improve the moisture absorption and permeability to water vapor of microfiber synthetic leather. When the dosage of HPAE-C was 8%, the permeability to water vapor and moisture absorption of microfiber synthetic leather were improved by 7% and 13%, respectively. The observation results obtained by using scanning electron microscope showed that HPAE-C could loose the fibers of synthetic leather.

The Research on Film-Forming Performance of a New Kind of Compound Inhibitor

2012 ◽  
Vol 550-553 ◽  
pp. 40-45
Author(s):  
Sheng Ping Fan ◽  
Fang Lin Zha ◽  
Shu Nan Cao
Keyword(s):  
Molecular Weight ◽  
Electron Microscope ◽  
Water Vapor ◽  
Decomposition Product ◽  
Low Molecular Weight ◽  
Decomposition Products ◽  
Film Forming ◽  
Site Water ◽  
Sem Test ◽  
Scanning Electron

The film-forming effect of a new kind of compound inhibitor at high temperature was researched, with taking pure octadecyamine and pure imidazoline as comparison tests. Coupon test has been taken with autoclave simulating the on-site water-vapor environment; the film-forming effect of the coupon has been evaluated by hydrophobic test, acid copper sulfate drip test ,AC impedance test and scanning electron microscope(SEM) test. The GC-MS test was taken to analysis decomposition products of the compound inhibitor. The results show that the compound inhibitor can film well, and decomposition product doesn’t contain low molecular weight organic acids and other harmful ingredients. The compound inhibitor can applied into practice safely and efficiently.

Effect of Raw Rubber on CH4 Formation from NBR Applied in Transformer Oil

2013 ◽  
Vol 631-632 ◽  
pp. 481-485 ◽  
Author(s):  
Fang Hu ◽  
Li Wen Tang ◽  
Song Zhang ◽  
Chun Hua Zhang ◽  
Dong Feng Chen ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Gas Chromatography ◽  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Work Environment ◽  
Transformer Oil ◽  
Infrared Analysis ◽  
Aging Resistance ◽  
Scanning Electron

The formation of CH4 from two kinds of NBR with different raw rubber applied in transformer oil were investigated. In this study, work environment of transformer was simulated，thermal aging tests were conducted for different times in 70°C transformer oil. Surface morphology, the release of CH4, and molecular structure were analyzed by using Gas Chromatography (GC), Scanning Electron Microscope (SEM), and Fourier Transform Infrared analysis (FTIR), respectively. In addition, the swelling property was also discussed in this work. The results illustrated that raw rubber with more content of acrylonitrile had excellent advantages in heat oil aging resistance and the formation of CH4.

The Influence of the Aqueous Dispersion of Maleic Anhydride Grafted Polypropylene (MAH-g-PP) on the Interfacial Crystallization of Glass Fiber Reinforced Polypropylene (PP/GF)

2014 ◽  
Vol 692 ◽  
pp. 251-254
Author(s):  
Xin Yi Zhao ◽  
Ke Zhao ◽  
Pei Qin Sun
Keyword(s):  
Electron Microscope ◽  
Maleic Anhydride ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Polarized Light ◽  
Aqueous Dispersion ◽  
Glass Fiber Reinforced ◽  
Suitable Temperature ◽  
Crystallization Of Glass ◽  
Scanning Electron

The aqueous dispersion of MAH-g-PP and KH-550 solution are used in the pretreatment of GF. The effects of pretreatment of the aqueous dispersion of MAH-g-PP and KH-550 solution on the interface crystallization of PP/GF, the suitable temperature and time of the pretreatment of the aqueous dispersion of MAH-g-PP on GF are studied by scanning electron microscope (SEM) and polarized light microscope (PLM). Finally, PLM is used to study the effects of the aqueous dispersion of MAH-g-PP on the crystallization of PP.

Study on the improvement of water vapor permeability and moisture absorption of microfiber synthetic leather base by collagen

2014 ◽  
Vol 85 (13) ◽  
pp. 1394-1403 ◽  
Author(s):  
Taotao Qiang ◽  
Xiaoqin Wang ◽  
Xuechuan Wang ◽  
Longfang Ren ◽  
Peiying Guo
Keyword(s):  
Water Vapor ◽  
Moisture Absorption ◽  
Water Vapor Permeability ◽  
Vapor Permeability ◽  
Synthetic Leather

Properties of Compatibilized SAN/NR Blends

2012 ◽  
Vol 488-489 ◽  
pp. 62-66
Author(s):  
Jareenuch Rojsatean ◽  
Supakij Suttireungwong ◽  
Manus Seadan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Maleic Anhydride ◽  
Impact Strength ◽  
Melt Blending ◽  
Elongation At Break ◽  
Reactive Agents ◽  
Internal Mixer ◽  
Scanning Electron

The blend of poly(styrene-co-acrylonitrile) (SAN) and natural rubber (NR) is immiscible and incompatible which lead to poor mechanical properties. Many methods can be carried out to improve the compatibility. In this work, the potential of various reactive compatibilizers in SAN and NR blend was explored. The morphological and mechanical properties were compared. The melt blending of SAN and NR were prepared in an internal mixer with various types of reactive agent such as styrene-co-maleic anhydride (SMA), maleic anhydride (MA), peroxide and mixed reactive agents. The morphological textures of the blends were investigated by scanning electron microscope. Mechanical properties including tensile strength, impact strength and elongation at break were measured. The results of morphological observations revealed that SAN/NR blend with reactive agent, the mixture of SMA and MA show the smallest and the most uniform dispersed NR particles, where the size of NR particle is about 1 µm. The mechanical properties of the blends revealed impact strength and elongation at break were increased with addition of reactive agents. SAN/NR blend with the mixture of SMA and MA showed the highest elongation at break but it had lower impact strength than the blend with SMA.

scholarly journals A Simple Method for Imaging DNA using SEM

2008 ◽  
Vol 16 (2) ◽  
pp. 38-39
Author(s):  
N. Chatterjee ◽  
K. Andresen ◽  
M. Thomas ◽  
L. Pollack ◽  
E. Kirkland
Keyword(s):  
Molecular Structure ◽  
Electron Microscope ◽  
Structure And Function ◽  
Biological Macromolecules ◽  
Common Theme ◽  
Simple Method ◽  
Transmission Electron ◽  
And Function ◽  
Molecular Structure And Function ◽  
Scanning Electron

The intricate relationship between molecular structure and function is a common theme in molecular biology. Visualizing the structure of biological macromolecules through imaging is therefore useful in understanding their varied biological roles. The process is often complex; imaging in a high voltage Transmission Electron Microscope (TEM) involves extensive staining and freezing. The aim of this experiment was to image DNA easily in a close to natural environment in a simple microscope. Samples were imaged using a Leo (Zeiss) 1550 Scanning Electron Microscope (SEM) with a Schottky field emitter in the 15-30kV range to reduce radiation damage. After imaging off-the-shelf DNA, two more DNA samples were dialyzed with RbCl and NaCl and imaged to elucidate what made the DNA visible.

scholarly journals Improving hygiene performance of microfiber synthetic leather base by mixing polyhydroxybutyrate nanofiber

2019 ◽  
Vol 14 ◽  
pp. 155892501984251
Author(s):  
Yongchao Duo ◽  
Xiaoming Qian ◽  
Baobao Zhao ◽  
Yao Qian ◽  
Ping Xu
Keyword(s):  
Water Vapor ◽  
High Performance ◽  
Moisture Absorption ◽  
Transmission Rate ◽  
Physical And Mechanical Properties ◽  
Average Diameter ◽  
Water Vapor Transmission Rate ◽  
Water Contact ◽  
Synthetic Leather ◽  
Water Vapor Transmission

Compared with natural leather, microfiber synthetic leather has many excellent properties such as chemical resistance and physical and mechanical properties. However, the preparation of high performance microfiber synthetic leather with excellent water vapor transmission rate, moisture absorption, and wearing comfort property still has a great challenge. The aim of this work was to improve moisture absorbent and transfer abilities by mixing polyhydroxybutyrate hydrophilic nanofibers in microfiber synthetic leather base. The effect of polyhydroxybutyrate nanofibers content on the structure and properties of microfiber synthetic leather base were investigated. The results indicated that polyhydroxybutyrate nanofibers with an average diameter of 0.40 μm were evenly distributed in all directions of microfiber synthetic leather base. As the nanofibers content increased from 0% to 20%, water contact angle decreased from 111.64° to 59.31°, resulting in 44% increase in water vapor transmission rate (from 3112.37 g/(m2 24 h) to 4350.53 g/(m2 24 h)) and 22.3% increase in moisture absorption (from 649.12% to 812.92%). Meanwhile, the addition of nanofibers made microfiber synthetic leather base dense, leading to 24.0% decrease in air permeability. In particular, the softness of microfiber synthetic leather base was increased by 42.18%. In addition, the tear strength was also significantly enhanced. Therefore, this study provided a viable method for preparing high performance microfiber synthetic leather base to use polyhydroxybutyrate nanofibers.

Mechanical and Morphology Properties of Polypropylene/ Nano-CaCO3 Composites

2013 ◽  
Vol 774-776 ◽  
pp. 625-628
Author(s):  
Teng Fei Shen ◽  
Fa Chao Wu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Maleic Anhydride ◽  
Interfacial Adhesion ◽  
Tensile Tests ◽  
Melt Blending ◽  
Elongation At Break ◽  
High Fraction ◽  
Scanning Electron

To provide polypropylene (PP) with better excellent mechanical properties, nanoCaCO3 particles are incorporated into PP matrix by melt blending in this work. To improve the mophology between PP and nanoCaCO3, maleic-anhydride grafted PP (PP-g-MAH) was added as a compatibiliser. The results showed that PP-g-MAH indeed enhanced the interfacial adhesion of PP /nanoCaCO3 composites, which is demonstrated by the measurement of scanning electron microscope (SEM). The results of tensile tests revealed that the inclusion of nanoCaCO3 slightly increased modulus and decreased tensile strength and significantly increased the elongation at break. At high fraction of nanoCaCO3, the elongation at break was declined. The nanosized feature, shape and dispersion conditions of nanoCaCO3, played important roles in determining the performances of PP/nanoCaCO3 composites.

scholarly journals Use of a New Imaging Technique to Document Deformations Recorded in the Environmental Scanning Electron Microscope

2003 ◽  
Vol 11 (3) ◽  
pp. 36-38
Author(s):  
Edward F. O'Neil ◽  
Hamlin M. Jennings ◽  
Jeffrey J. Thomas
Keyword(s):  
Electrical Conductivity ◽  
Electron Microscope ◽  
Water Vapor ◽  
Scanning Electron Microscope ◽  
Imaging Technique ◽  
Environmental Scanning Electron Microscope ◽  
Environmental Scanning ◽  
Scanning Electron

The introduction of the environmental scanning electron microscope (ESEM) greatly Improved the functionality of scanning electron microscope (SEM) technology by allowing objects to be imaged in water-vapor under low vacuum, and without the need for coating to facilitate electrical conductivity. The low vacuum environment allows Imaging of delicate structures, such as needlelike crystals, without fear of damaging the object in the process of viewing it.

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