Structure-Property Relationship of Dodecylbenzenesulfonic Acid Doped Polyaniline

2013 ◽  
Vol 721 ◽  
pp. 199-205 ◽  
Author(s):  
Ying Liu ◽  
Qi Wen ◽  
Jia Li Guan ◽  
Shi Jie Zhao ◽  
Qi Xing Hu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ammonium Persulfate ◽  
Degree Of Crystallinity ◽  
Structure Property ◽  
X Ray Diffraction ◽  
Electrospinning Technique ◽  
Dodecylbenzenesulfonic Acid ◽  
Molar Ratios ◽  
Liquid Crystal Property ◽  
Relationship Of

Dodecylbenzenesulfonic acid (DBSA) doped polypanilines (PANIs) were chemically synthesized in different molar ratios of aniline (An) to ammonium persulfate (APS) and An to DBSA. The microstructures of these PANIs were investigated by means of scanning electron microscope (SEM), X-ray diffraction (XRD), and Fourier Transform Infrared (FTIR). UV-Vis spectrometer, semiconductor parameter analyzer, ubbelohde viscometer and electrospinning technique were used to characterize the optical, electrical properties, viscosity and solubility of these PANIs. The results show that the molar rations of An to APS and An to DBSA had strong effect on the microstructure, molecular weight, degree of crystallinity, optical property, solubility and conductivity of obtained DBSA doped PANI. With the increase of the molar ratios of An to APS and An to DBSA, the conductivities and molecular weight of DBSA doped PANIs decreased, while the degree of crystallinity and solubility of DBSA doped PANIs increased. The DBSA doped PANI could dissolve in dichloromethane or HFIP and could be fabricated short fibers by electrospinning. Moreover, the solution of DBSA doped PANIs in concentrated sulphuric acid showed liquid crystal property.

Structure-Property Relationship of Ion-Beam Sputtered Nd-Fe-B Magnetic Thin Films On (111) Silicon

1994 ◽  
Vol 354 ◽  
Author(s):  
Anthony S. Nazareth ◽  
Harsh Deep Chopra ◽  
D. K. Sood ◽  
R. B. Zmood
Keyword(s):  
Thin Films ◽  
Ion Beam ◽  
Magnetic Thin Films ◽  
Misfit Strain ◽  
Crystallographic Structure ◽  
Nominal Composition ◽  
Structure Property ◽  
X Ray Diffraction ◽  
Relationship Of

AbstractA focussing grid broad beam Kaufman source, using argon ions on a target of nominal composition Nd2Fei4B has been employed to sputter deposit magnetic thin films of thicknesses ranging from 800 â to 1300 â on silicon-(lll) substrates at room temperature. These films were characterised for their composition depth profile by Rutherford Backscattering Spectroscopy, while x-ray diffraction was used to study the crystallographic structure. Due to a close match between (111) Si with (220) Nd2Fej4B lattice spacings, preferred crystallographic texturing was expected, and experimental results showed a greatly enhanced (220) texture. The degradation in magnetic properties was attributed to the presence of oxygen in the films as indicated by concentration depth profiles. It is premised that another significant role of oxygen may be to relieve the misfit strain across the interface by its incorporation within the Nd2Fej4B phase.

Synthesis of blocked waterborne polyurethane polymeric dyes with tailored molecular weight: thermal, rheological and printing properties

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 56831-56838 ◽  
Author(s):  
Haiyan Mao ◽  
Youjiang Wang ◽  
Donggang Yao ◽  
Chaoxia Wang ◽  
Shiguo Sun
Keyword(s):  
Molecular Weight ◽  
Waterborne Polyurethane ◽  
Structure Property ◽  
Property Relationship ◽  
Structure Property Relationship ◽  
Relationship Of ◽  
Polymeric Dyes

The structure–property relationship of the polymeric dyes with tailored molecular weight including rheological, thermal, and printing properties are mainly investigated.

Crosslinking and Mechanical Properties of Liquid Rubber. I. Curative Effect of Aliphatic DIOLS

1979 ◽  
Vol 52 (5) ◽  
pp. 920-948 ◽  
Author(s):  
Yuji Minoura ◽  
Shinzo Yamashita ◽  
Hiroshi Okamoto ◽  
Tadao Matsuo ◽  
Michiaki Izawa ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Low Molecular Weight ◽  
Structure Property ◽  
X Ray Diffraction ◽  
Curative Effect ◽  
Polyurethane Elastomers ◽  
X Ray ◽  
Structure Property Relationships ◽  
The Difference

Abstract The structure-property relationships of polyurethane elastomers derived from a liquid hydroxyl-terminated polybutadiene/low molecular weight aliphatic diol/diisocyanate system were studied. The effects of the amount of low molecular weight diol on the mechanical properties of the elastomer were discussed on the basis of the results of stress-strain, swelling, dynamic viscoelasticity, x-ray diffraction, etc. It was found that some particular combinations of low molecular weight diol and diisocyanate specifically affect the properties of elastomers. When the mechanical properties of the elastomers were plotted against the number of methylene carbons in the low molecular weight diol, characteristic zigzag patterns were obtained. These patterns were explained by the difference in the packing and the dependence of the strength of intermolecular hydrogen bonding on whether the number of the methylene carbons was even or odd. This assumption was confirmed by x-ray diffraction.

Structure-Property Relationship of a Thermoplastic Vulcanizate (Tpv)/Layered Silicate Nanocomposites Prepared Using Maleic Anhydride Modified Polypropylene as a Compatibilizer

2005 ◽  
Vol 78 (1) ◽  
pp. 42-53 ◽  
Author(s):  
Joy K. Mishra ◽  
Il Kim ◽  
Chang-Sik Ha ◽  
Jin-Ho Ryou ◽  
Gue-Hyun Kim
Keyword(s):  
Maleic Anhydride ◽  
Layered Silicate ◽  
Mechanical Analysis ◽  
Structure Property ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermoplastic Vulcanizate ◽  
Transmission Electron ◽  
Relationship Of ◽  
And Storage

Abstract Thermoplastic vulcanizate(TPV)/organoclay nanocomposites have been successfully prepared by melt intercalation method. Maleic anhydride modified polypropylene has been used as a compatibilizer. The TPV/organoclay nanocomposites have been characterized by Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and Transmission Electron Microscope (TEM). The nanocomposite as evidenced by X-ray diffraction is an intercalated one. The nanocomposites exhibited remarkable improvement in tensile and storage modulus over their pristine counterpart. The dynamic mechanical analysis reveals that the glass transition temperature of the polypropylene phase of the nanocomposite is increased (compared to its pristine counterpart), whereas the EPDM phase remains same. The nanocomposites showed improved solvent resistance over its pristine counterpart. The structure-property correlation of the nanocomposites is attempted.

Effects of the Polyvinyl Alcohol (PVA) on the Synthesis of Alumina Fibers through Electrospinning Technique

2010 ◽  
Vol 173 ◽  
pp. 150-154 ◽  
Author(s):  
Ruzainah Abdullah ◽  
Srimala Sreekantan ◽  
Mohamad Hasmaliza
Keyword(s):  
Sol Gel ◽  
Xrd Analysis ◽  
Molten Metals ◽  
X Ray Diffraction ◽  
High Melting Point ◽  
Electrospinning Technique ◽  
Molar Ratios ◽  
C Fibers ◽  
Sem Micrograph ◽  
Alumina Fibers

Alumina fiber products have high modulus and strength that are resistant toward the attacks of molten metals and non-oxide materials up to 1000°C. Fibers also have low thermal conductivity and high melting point. In this work, alumina fibers were synthesized by sol-gel electrospinning technique (e-spinning). The sol was prepared by mixing aluminum nitrate nonahydrate (ALN) and aluminum isopropoxide at 1:3 molar ratios. The precursor sol was stirred vigorously for 24 hours until ALP completely dissolved. After stirring, the precursor sol with PVA and without PVA was evaporating to obtain the suitable viscosity to spin. The rheology and viscosity were checked by viscometer. At the appropriate viscosity range about 0.2 to 7 Poise, the sol was then spinning into fibers using electrospinning machine. The green fibers were then dried at room temperature then calcined at 1200°C. The fibers produced were characterized using X-Ray Diffraction (XRD) and Field Emission Scanning Electron Microscope (FESEM). The XRD analysis had shown the α-alumina was formed at 1200 °C and SEM micrograph shows the formation of fibers with PVA addition.

Structure–property relationship of dodecylbenzenesulfonic acid doped polypyrrole

2013 ◽  
Vol 164 ◽  
pp. 27-31 ◽  
Author(s):  
Qi Wen ◽  
Xiao Pan ◽  
Qi-xing Hu ◽  
Shi-jie Zhao ◽  
Zhi-feng Hou ◽  
...  
Keyword(s):  
Structure Property ◽  
Dodecylbenzenesulfonic Acid ◽  
Property Relationship ◽  
Structure Property Relationship ◽  
Relationship Of

Effect of Crystalline Morphology on Mechanical Properties of PPB Polymer Nanofiber Composite

2012 ◽  
Vol 506 ◽  
pp. 262-265
Author(s):  
S. Sangthaiyarak ◽  
N. Tawichai ◽  
Kamonpan Pengpat ◽  
Gobwute Rujijanagul ◽  
Tawee Tunkasiri ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Applied Voltage ◽  
Degree Of Crystallinity ◽  
Crystalline Morphology ◽  
X Ray Diffraction ◽  
Electrospinning Technique ◽  
Nanofiber Composite ◽  
X Ray ◽  
Polymer Nanofiber ◽  
The Degree Of Crystallinity

In this work, the effects of crystalline morphology on the mechanical properties of polycaprolactone/polyvinyl alcohol/ butterfly pea extract (PPB) nanofiber composite were investigated. Biopolymer nanofiber composite of PPB was fabricated by electrospinning technique using polycaprolactone concentration and distance of nozzle to ground collector of 7 wt% and 20 cm, respectively. The influence of applied voltage (vary from 15-25 kV) on the stress-strain curves was also observed. The structure and morphology of electrospun PPB nanofibers were investigated by x-ray diffraction (XRD) and scanning electron microscopy (SEM). It was found that, the degree of crystallinity increased with applied voltage and the mechanical properties was affected by the morphology of PPB nanofiber.

The Collagenic Molecular Structural Unit of Solid State Complexes

1971 ◽  
Vol 29 ◽  
pp. 478-479
Author(s):  
Kenneth M. Richter ◽  
John A. Schilling
Keyword(s):  
Molecular Weight ◽  
Solid State ◽  
Structural Unit ◽  
X Ray Diffraction ◽  
X Ray ◽  
Naoh Treatment

The structural unit of solid state collagen complexes has been reported by Porter and Vanamee via EM and by Cowan, North and Randall via x-ray diffraction to be an ellipsoidal unit of 210-270 A. length by 50-100 A. diameter. It subsequently was independently demonstrated by us in dog tendon, dermis, and induced complexes. Its detailed morphologic, dimensional and molecular weight (MW) aspects have now been determined. It is pear-shaped in long profile with m diameters of 57 and 108 A. and m length of 263 A. (Fig. 1, tendon, KMnO4 fixation, Na-tungstate; Fig. 2a, schematic of unit in long, C, and x-sectional profiles of its thin, xB, and bulbous, xA portions; Fig. 2b, tendon essentially unmodified by ether and 0.4 N NaOH treatment, Na-tungstate). The unit consists of a uniquely coild cable, c, of ṁ 22.9 A. diameter and length of 2580-3316 A. The cable consists of three 2nd-strands, s, each of m 10.6 A.

Examination of Rabbit Fc Crystals

1968 ◽  
Vol 26 ◽  
pp. 140-141
Author(s):  
J. P. Robinson ◽  
P. G. Lenhert
Keyword(s):  
Molecular Weight ◽  
Flat Plate ◽  
Phosphate Buffer ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
X Ray ◽  
Neutral Ph ◽  
Small Crystals ◽  
Carbon Coated ◽  
Diffraction Patterns

Crystallographic studies of rabbit Fc using X-ray diffraction patterns were recently reported. The unit cell constants were reported to be a = 69. 2 A°, b = 73. 1 A°, c = 60. 6 A°, B = 104° 30', space group P21, monoclinic, volume of asymmetric unit V = 148, 000 A°3. The molecular weight of the fragment was determined to be 55, 000 ± 2000 which is in agreement with earlier determinations by other methods.Fc crystals were formed in water or dilute phosphate buffer at neutral pH. The resulting crystal was a flat plate as previously described. Preparations of small crystals were negatively stained by mixing the suspension with equal volumes of 2% silicotungstate at neutral pH. A drop of the mixture was placed on a carbon coated grid and allowed to stand for a few minutes. The excess liquid was removed and the grid was immediately put in the microscope.

Low Molecular Weight Microfibers with Light Sensing Properties

2017 ◽  
Vol 54 (4) ◽  
pp. 655-658
Author(s):  
Andrei Bejan ◽  
Dragos Peptanariu ◽  
Bogdan Chiricuta ◽  
Elena Bicu ◽  
Dalila Belei
Keyword(s):  
Molecular Weight ◽  
Low Molecular Weight ◽  
X Ray Diffraction ◽  
Aromatic Rings ◽  
X Ray ◽  
Force Microscopy ◽  
Light Sensing ◽  
Sensing Applications ◽  
Atomic Force ◽  
Low Molecular Weight Compounds

Microfibers were obtained from organic low molecular weight compounds based on heteroaromatic and aromatic rings connected by aliphatic spacers. The obtaining of microfibers was proved by scanning electron microscopy. The deciphering of the mechanism of microfiber formation has been elucidated by X-ray diffraction, infrared spectroscopy, and atomic force microscopy measurements. By exciting with light of different wavelength, florescence microscopy revealed a specific optical response, recommending these materials for light sensing applications.

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