Synthesis and Properties of Polypropylene Carbonate Polyol-Based Waterborne Polyurethane

2014 ◽  
Vol 936 ◽  
pp. 58-62 ◽  
Author(s):  
Cheng Shu Xu ◽  
Cheng Cheng Tian ◽  
Wei Dong Zhang ◽  
Jian Wei Xing ◽  
Zai Sheng Cai ◽  
...  
Keyword(s):  
Water Resistance ◽  
Soft Segment ◽  
Waterborne Polyurethane ◽  
Infrared Spectrometry ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
Fourier Transform Infrared Spectrometry ◽  
X Ray ◽  
Polyhydric Alcohols ◽  
Ft Ir

Different kinds of anionic polyhydric alcohols water-borne polyurethane (WPU) emulsion and films were prepared by separately taking polypropylene carbonate polyol (PPC), polyethylene-1,4-buthylene adipate glycol (PBA) and polytetramethylene ether glycol (PTMG) with the same molecular weight as soft segment. Their structure and properties were characterized with Fourier transform infrared spectrometry (FT-IR), X-ray diffraction (XRD), rigidity, adhesive power, contact angle and water absorption. Comparing their properties, it was found that the rigidity, adhesive power and water resistance of PPC WPU were similar to those of PBA WPU.

The Study of Existential State of Protein in Protein/Montmorillonite Complexes

2011 ◽  
Vol 194-196 ◽  
pp. 1647-1651
Author(s):  
Ying Hai Lv ◽  
Gui Jiang Li ◽  
Li Qiang Cui ◽  
Hua Xiao Yan ◽  
Shi Xue Zhou
Keyword(s):  
Interlayer Space ◽  
Random Coil ◽  
Infrared Spectrometry ◽  
X Ray Diffraction ◽  
Fourier Transform Infrared Spectrometry ◽  
X Ray ◽  
Ft Ir ◽  
Loading Amount ◽  
Α Helix ◽  
Structure Of Proteins

The existential state of protein in complexes directly affects the performance and applications of the composite materials. The interlayer space changes of montmorillonite in the protein / montmorillonite (MMT) composite were identified by X-ray diffraction (XRD). And the interaction between protein and MMT were analyzed by Fourier transform infrared spectrometry (FT-IR) and UV/vis spectrophotometry. The loading amount of bovine serum albumin (BSA) onto MMT was calculated from the TG data. The types of adsorption isotherm of BSA onto montmorillonite were analyzed. From the above analysis, it can be concluded that the structure of proteins in the montmorillonite interlayers has been changed, and the hydrogen bond and Van der Waals force between the BSA molecules and montmorillonite crystal layers are intensified. The α-helix content of BSA molecules reduces while random coil increases. The protein shows a state of being squashed.

scholarly journals Photocatalytic Degradation of Methylene Blue Using TiO2Impregnated Diatomite

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Ranfang Zuo ◽  
Gaoxiang Du ◽  
Weiwei Zhang ◽  
Lianhua Liu ◽  
Yanming Liu ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Energy Dispersive Spectrum ◽  
Complete Loss ◽  
Infrared Spectrometry ◽  
Potential Solution ◽  
X Ray Diffraction ◽  
Fourier Transform Infrared Spectrometry ◽  
X Ray ◽  
Good Catalytic Activity ◽  
Scanning Electron

Nano-TiO2showed a good catalytic activity, but it is easy to agglomerate, resulting in the reduction or even complete loss of photocatalytic activity. The dispersion of TiO2particles on porous materials was a potential solution to this problem. Diatomite has high specific surface and absorbability because of its particular shell structure. Thus, TiO2/diatomite composite, prepared by loading TiO2on the surface of diatomite, was a good photocatalyst, through absorbing organic compounds with diatomite and degrading them with TiO2. Scanning electron microscopy (SEM), energy dispersive spectrum (EDS), X-ray diffraction (XRD), chemical analysis, and Fourier transform infrared spectrometry (FTIR) indicated that TiO2was impregnated well on the surface of diatomite. Furthermore, TiO2/diatomite was more active than nano-TiO2for the degradation of methylene blue (MB) in solution. MB at concentrations of 15 and 35 ppm can be completely degraded in 20 and 40 min, respectively.

The Photocatalytic Degradation of Methylene Blue Using Bismuth Vanadate (Bi2VO5.5) Powder

2017 ◽  
Vol 751 ◽  
pp. 707-712
Author(s):  
Jitreephan Phanmalee ◽  
Prakasit Intaphong ◽  
Wiyong Kangwansupamonkon ◽  
Sukon Phanichphant ◽  
Pusit Pookmanee
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Bismuth Vanadate ◽  
Infrared Spectrometry ◽  
Microwave Method ◽  
X Ray Diffraction ◽  
Fourier Transform Infrared Spectrometry ◽  
X Ray ◽  
Ammonium Vanadate ◽  
Scanning Electron

Bismuth vanadate (Bi2VO5.5) powder has been successfully prepared by microwave method. Bismuth nitrate and ammonium vanadate were used as the starting precursors with the mole ratio of 2:1 in 2-propanol. The microwave power was 500 Watt for 2-6 min. The yellow powder was obtained and calcined at 500°C for 2h. The structure was identified by X-ray diffraction (XRD). The morphology was investigated by scanning electron microscopy (SEM). The chemical composition was determined by energy dispersive X-ray spectrometry (EDXS). The functional groups were investigated by fourier transform infrared spectrometry (FTIR) The photocatalytic degradation of methylene blue (MB) using Bi2VO5.5 powder was studied by ultraviolet-visible spectrophotometry (UV-Vis).

Corrosion Behaviors of Li-B-H Films in Air

2015 ◽  
Vol 1089 ◽  
pp. 185-189
Author(s):  
Zheng Wei Xiong ◽  
Wei Dong Wu
Keyword(s):  
Ambient Temperature ◽  
Photoelectron Spectroscopy ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Infrared Spectrometry ◽  
Fourier Transform Infrared Spectrometry ◽  
X Ray ◽  
Corrosion Behaviors ◽  
Ft Ir ◽  
Scanning Electron

In the present study, Li-B-H films contained LiBH4 and Li2B12H12 were fabricated under different hydrogen pressures (20, 70 Pa) at ambient temperature by pulsed laser deposition (PLD). The corrosion behaviors of the films were studied over a time of 1-24 h in the air at ambient temperature. Fourier transform infrared spectrometry (FT-IR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were used to analyze the formed oxidation film. The results indicated that an oxidation film with obvious cracks and holes were formed, which was composed by Li2B4O7 and Li2CO3. The films were mainly reacted with H2O and CO2, so the oxidation of Li-B-H could be prevented by avoiding exposed to air.

Preparations and Characterization of Sago Starch Dispersion and Modification

2012 ◽  
Vol 620 ◽  
pp. 395-399 ◽  
Author(s):  
Siti Rohana Yahya ◽  
A. Rashid Azura ◽  
Baharin Azahari
Keyword(s):  
Ball Mill ◽  
Xrd Analysis ◽  
Infrared Spectrometry ◽  
Sago Starch ◽  
X Ray Diffraction ◽  
Fourier Transform Infrared Spectrometry ◽  
X Ray ◽  
Dispersing Agent ◽  
Grafting Copolymerization

Sago starch was mechanically treated with a stirring ball mill using anchoid as dispersing agent. Sago starch chemical modification was obtained from grafting copolymerization with polybutylacrylate (PBA) to reduce hydrophilic properties. The mechanical dispersed and chemical modified sago starches were studied through scanning electron microscopy (SEM), fourier transform infrared spectrometry (FTIR), and x-ray diffraction (XRD) analysis.

Assembling of 12-Tungstophosphoric Acid into Amino-Modified SBA-15 and its Catalytic Performance

2012 ◽  
Vol 465 ◽  
pp. 224-228 ◽  
Author(s):  
Hong Qi Guo ◽  
Gong Yan ◽  
Ming Qing Chen ◽  
Shi Rong Liu
Keyword(s):  
Catalytic Performance ◽  
Tungstophosphoric Acid ◽  
Esterification Reaction ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Catalytic Activities ◽  
Ft Ir ◽  
Adsorption Desorption ◽  
Ft Ir Spectroscopy

12-tungstophosphoric acid was supported on amine-modified SBA-15 by impregnation. The structure and properties of the catalyst were characterized by FT-IR spectroscopy, X-ray diffraction, N2 adsorption-desorption, TEM,Raman spectra and NH3–TPD technology.the result confirmed the mesostructure for SBA-15 and the Keggin structure of the heteropolyanions was preserved. The tungstophosphoric acid can disperse in the pore of the support SBA-15/NH2, but the acidity of the catalyst reduced. The catalytic activities of the catalysts were evaluated for the esterification reaction of ethyl acetoacetate and ethylene glycol .and the catalysts supported on amine-modified SBA-15 show excellent reusability and selectivity.

Analysis of Materials Contained in Mid-4th to Early 7th Century A. D. Palestinian Kohl Tubes

1992 ◽  
Vol 267 ◽  
Author(s):  
William D. Blanchard ◽  
E. Marianne Stern ◽  
Leon P. Stodulski
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Analytical Techniques ◽  
Fourier Transform Infrared ◽  
Infrared Spectrometry ◽  
X Ray Diffraction ◽  
Fourier Transform Infrared Spectrometry ◽  
X Ray ◽  
Scanning Electron

ABSTRACTThe powdered contents of 17 Late Roman and Byzantine glass vessels used to hold cosmetic eye-paints (kohl) were analyzed. The principal analytical techniques employed were X-ray diffraction, Fourier-transform infrared spectrometry, X-ray fluorescence, and scanning electron microscopy. The materials detected are described, indicating those which may have been used as kohl. Also reported are analytical results from a solid chunk of material surrounding a fragment of a metal rod, also obtained from a kohl vessel.

Synthesis, Properties and Applications of Polymer-Grafted SrAl2O4: Eu2+, Dy3+

2013 ◽  
Vol 634-638 ◽  
pp. 2314-2317 ◽  
Author(s):  
Jie Chang ◽  
Su Li Wu ◽  
Shu Fen Zhang
Keyword(s):  
Methyl Methacrylate ◽  
Metal Ions ◽  
Water Resistance ◽  
The Other ◽  
X Ray Diffraction ◽  
X Ray ◽  
Synthesis Properties ◽  
Ft Ir ◽  
Diffraction Patterns

A polymer-grafted SrAl2O4: Eu2+, Dy3+ (PG-SAO-ED) were synthesized by using a bi-functional ligand (3-allyl-2, 4-pentanedione, denoted as APD) as a bridge, which can coordinate with the unsaturated metal ions on the surface of SrAl2O4: Eu2+, Dy3+ (SAO-ED) at one end, and copolymerize with methyl methacrylate and styrene at the other end. The sample was analyzed by FT-IR and Powder X-ray diffraction patterns (XRD). The PG-SAO-ED can well be applied in painting or ink, they have good miscibility with organics. The luminescent painting containing PG-SAO-ED has greatly higher water resistance than that containing SAO-ED.

Pre-Oxidation Nanofibers from Acrylonitrile-Acrylamide Copolymers Synthesized by Solvent-Water Polymerization

2011 ◽  
Vol 175-176 ◽  
pp. 164-169 ◽  
Author(s):  
Jun Sun ◽  
Kai Tao Wang ◽  
Jian Jun Wang ◽  
Chuan Xiang Qin ◽  
Li Xing Dai
Keyword(s):  
Carbon Nanofiber ◽  
Water Solution ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
Copolymer Solution ◽  
X Ray ◽  
Solvent Water ◽  
Dimethyl Acetamide ◽  
Ft Ir ◽  
Polymerization Method

Solvent-water suspension free-radical polymerization method was used to synthesize acrylonitrile(AN)-acrylamide(AM) copolymers in this paper. The copolymerization was carried out with azobisisobutyronitrile (AIBN) as an initiator and dimethysulfoxide (DMSO)/ water solution as solvents at a constant monomer ratio (AN:AM(wt)=85:15). The ratio(wt) AN:AM=100:0 was also be used for a comparison. The structure and properties of the copolymers was studied by fourier transform infrared (FT-IR), X-ray diffraction (XRD) and thermogravimetry(TG). The nanofibers were obtained by electrospinning AN-AM copolymer solution with N,N-Dimethyl acetamide(DMAc) as a solvent. Then, the fibers were pre-oxidized in relaxation state and in air by using an oven. The structure of pre-oxidized nanofibers was investigated by scanning electron microscopy (SEM) and FT-IR. The results showed that the ratio of dimethysulfoxide (DMSO)/water 50/50(v) was optimum for the copolymer properties and nanofiber spinnability as a carbon nanofiber precursor. The copolymer fibers only needed lower preoxidation temperature and shorter preoxidation time to reach the same degree of cyclization due to the introduction of AM.

scholarly journals Synthesis and Properties of Linear Polyether-Blocked Amino Silicone-Modified Cationic Waterborne Polyurethane

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Chengshu Xu ◽  
Lei OuYang ◽  
Yan Ren ◽  
Zaisheng Cai ◽  
Shaofeng Lu ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Soft Segment ◽  
Waterborne Polyurethane ◽  
Adhesive Force ◽  
Chain Extender ◽  
Infrared Spectrometry ◽  
Water Contact ◽  
X Ray ◽  
Force Microscopy ◽  
Amino Silicone

In this study, a waterborne polyurethane (WPU) is synthesized by using polytetramethylene ether glycol (PTMEG) to form the soft segment, 1,4-butanediol (BDO) as the chain extender, n-methyldiethanolamine (MDEA) as a hydrophilic chain extender, and isophorone diisocyanate (IPDI) to form the hard segment. Furthermore, the modified cationic WPU emulsion and its films are created through a reaction between the WPU and a linear polyether-blocked amino silicone (LEPS), which is an organosilicon compound that imparts flexibility. The properties of the structure and formed WPU films are then characterized by using Fourier transform infrared spectrometry, a thermogravimetric analysis, atomic force microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, as well as by measuring the water contact angle, testing the water absorption, etc. It is found that, with an increase in the LEPS content in the WPU, the particle size of the modified WPU emulsion is increased, the WPU films are more flexible, and the resistance of the modified WPU films to heat and water are increased, while the crystallinity is reduced. The polysiloxane chain segment, which is added to the LEPS-modified WPU emulsion, is significantly enriched on the surface of the modified WPU films, while there are no adverse effects of the LEPS-modified WPU emulsion on the adhesive force between the WPU and substrate. When the LEPS content of the WPU is 14.0 wt%, the modified WPU emulsion and film provide the best performance.

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