Synthesis of Novel Cationic Waterborne Polyurethane from Natural Rubber and its Properties Testing

2016 ◽  
Vol 705 ◽  
pp. 19-23 ◽  
Author(s):  
Nathapong Sukhawipat ◽  
Nitinart Saetung ◽  
Anuwat Saetung
Keyword(s):  
Particle Size ◽  
Natural Rubber ◽  
Waterborne Polyurethane ◽  
The Novel ◽  
Quaternary Amine ◽  
H Nmr ◽  
Waterborne Polyurethanes ◽  
Isocyanate Index ◽  
Ft Ir ◽  
Emulsion Concentration

The novel natural rubber based cationic waterborne polyurethanes (cWPUs) with having quaternary amine as an emulsifier were successfully synthesized by additional polymerization. These polyurethanes were synthesized by the reaction of hydroxyl the method of telechelic natural rubber. Molecular weight approximately of hydroxyl telechelic natural rubber (HTNR) for 3000 g.mole-1, toluene-2,4-diisocyanate (TDI), and N-methyl diethanol amine (NMDEA) (used as an emulsifier) were prepared for cWPU. The concentrations of NMDEA were examined in range of 0 – 2.0 moles. From the results under the isocyanate index of 100, the study revealed that cWPU with well-distributing had to consist of emulsion concentration more than 1.50 moles. Zetasizer nanorange was used to identify the prepared cWPU particle size distribution. The results showed that the particle size of cWPU was decreased from 86.6 to 78 nm with increasing of NMDEA concentration. The smallest particle size was 2 moles with non-acetic acid odor, and very soft film. In addition, cWPU would be well-dispersed more than 4 months. The 1H NMR spectroscopy and FT-IR confirmed that the cWPU has been successfully synthesized from natural rubber.

scholarly journals Synthesis of Novel Compounds as New Potent Tyrosinase Inhibitors

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Hooshang Hamidian
Keyword(s):  
Kojic Acid ◽  
Azo Compounds ◽  
The Novel ◽  
Mushroom Tyrosinase ◽  
Reference Standard ◽  
Tyrosinase Inhibition ◽  
H Nmr ◽  
Ft Ir ◽  
Tyrosinase Inhibitors ◽  
C Nmr

In the present paper, we report the synthesis and pharmacological evaluation of a new series of azo compounds with different groups (1-naphthol, 2-naphthol, andN,N-dimethylaniline) and trifluoromethoxy and fluoro substituents in the scaffold. All synthesized compounds (5a–5f) showed the most potent mushroom tyrosinase inhibition (IC50values in the range of 4.39 ± 0.76–1.71 ± 0.49 µM), comparable to the kojic acid, as reference standard inhibitor. All the novel compounds were characterized by FT-IR,1H NMR,13C NMR, and elemental analysis.

Lyotropic liquid crystalline phthalocyanines containing 4-((S)-3,7-dimethyloctyloxy)phenoxy moieties

2017 ◽  
Vol 21 (01) ◽  
pp. 16-23 ◽  
Author(s):  
Sibel Eken Korkut ◽  
Hale Ocak ◽  
Belkıs Bilgin-Eran ◽  
Dilek Güzeller ◽  
M. Kasım Şener
Keyword(s):  
Liquid Crystalline ◽  
Spectroscopic Properties ◽  
The Novel ◽  
H Nmr ◽  
Vis Spectroscopy ◽  
Wide Range ◽  
Ft Ir ◽  
Aggregation Behaviors ◽  
Mesomorphic Properties ◽  
Thermotropic Liquid Crystalline Behavior

The novel metal free phthalocyanine and its copper complex which are octa-substituted at the peripheral positions with 4-(([Formula: see text]-3,7-dimethlyoctyloxy)phenoxy moieties were synthesized and characterized by FT-IR, 1H NMR and mass spectroscopy. Their mesomorphic properties were studied by polarizing optical microscopy. The spectroscopic properties and aggregation behaviors of the novel phthalocyanines were also investigated by UV-vis spectroscopy in different solvents with same concentration as well as in a wide range of concentrations of chloroform. Both compounds with chloroform and [Formula: see text]-dodecane clearly show the lyotropic columnar mesophase in a wide temperature range whereas thermotropic liquid crystalline behavior for both compounds is not observed. Both of these novel compounds show no aggregation in toluene, tetrahydrofuran, dichloromethane and chloroform.

scholarly journals Study on the Preparation and Application of Lignin-Derived Polycarboxylic Acids

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Ruiqi Wang ◽  
Bing Zhou ◽  
Zichen Wang
Keyword(s):  
Mechanical Properties ◽  
Main Product ◽  
Waterborne Polyurethane ◽  
Reaction Conditions ◽  
Polyurethane Elastomers ◽  
Nmr Spectrum ◽  
H Nmr ◽  
Polycarboxylic Acids ◽  
Benzene Rings ◽  
Ft Ir

Lignin was oxidized by NaOCl, and the main product of the reaction was named lignin-derived polycarboxylic acids (LPCAs). The effect of the reaction conditions was studied. With the mix ratio [n(NaOCl)/m(lignin)] increasing, the content of carboxyl of LPCAs increased. When the reaction temperature or the reaction time increased, the content of carboxyl decreased in different degrees. After the oxidation by NaOCl, the content of hydroxyl and methoxyl of lignin decreased, and the molecular weight of lignin decreased as well. The FT-IR and 1H-NMR spectrum of lignin suggested that the benzene rings of lignin were disrupted after the oxidation. A possible mechanism of the oxidation of lignin by sodium hypochlorite is supposed to briefly demonstrate the reason that the benzene rings were disrupted and the content of carboxyl increased. Finally, an application example shows that LPCAs can strengthen the mechanical properties of waterborne polyurethane elastomers.

Synthesis of Bis(2, 4-Dihydro-2H-3-(4-N-Maleimido) Phenyl -1, 3-Benzoxazine)Isopropane

2011 ◽  
Vol 287-290 ◽  
pp. 688-693
Author(s):  
Guo Tao ◽  
You Hui Xu ◽  
Gang Yang
Keyword(s):  
Maleic Anhydride ◽  
Target Object ◽  
The Novel ◽  
H Nmr ◽  
Chemical Structures ◽  
Ft Ir

The novel bis(2, 4-dihydro-2H-3-(4-N-maleimido) phenyl-1, 3-benzoxazine)isopropane (BMIPBI) was synthesized from maleic anhydride, p-nitroaniline, formaldehyde and 2,2-bis(4-hydr -oxyphenyl)propane by a few steps reactions via the N-(4-nitrophenyl)maleimide(NPMI), N-(4-amin -ophenyl)maleimide(APMI),1,3,5-three(4-(maleimido)phenyl)-1,3,5-triazine(TMIPT)intermediate production. The chemical structures of BMIPBI were confirmed by 1H-NMR, FT-IR and EA. The results show that the production was the target object BMIPBI. The synthesized condition had been studied too. The BMIPBI was a loosened yellow solid and the yield of product was 58.8%.

Preparation and Application of Undecylenate Based Diol for Bio-Based Waterborne Polyurethane Dispersion

2014 ◽  
Vol 955-959 ◽  
pp. 88-91 ◽  
Author(s):  
Zhe Yang ◽  
Yan Bin Zhu ◽  
Fang Peng ◽  
Chang Qing Fu
Keyword(s):  
Castor Oil ◽  
Room Temperature ◽  
Click Reaction ◽  
Waterborne Polyurethane ◽  
Chain Extender ◽  
Proton Nuclear Magnetic Resonance ◽  
Isophorone Diisocyanate ◽  
Polyurethane Dispersion ◽  
Waterborne Polyurethanes ◽  
Ft Ir

The undecylenate based diol (UAD) has been synthesized from undecylenate by esterification and thiol-ene click reaction sequently, and then it was used as a diol to prepare bio-based waterborne polyurethane (WPU) reacting with isophorone diisocyanate (IPDI) and castor oil-based carboxyl hydrophilic chain extender. The structure of undecylenate based diol was verified by hydrogen proton nuclear magnetic resonance (1H NMR). Fourier transform infrared spectroscopy (FT-IR) was used to characterize the structure of WPU film. Furthermore, particle size and viscosity were used to character apparent properties of the bio-based waterborne polyurethane dispersion. The result shows that: bio-based waterborne polyurethane dispersion is transparent and very stable under room temperature. This work provides a simple and efficient method for the preparation of fatty acids based polyols and bio-based waterborne polyurethanes.

scholarly journals The Relationship between Solid Content and Particle Size Ratio of Waterborne Polyurethane

Coatings ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 401 ◽  
Author(s):  
Jinghui Hou ◽  
Yifei Ma ◽  
Zihan Zhang ◽  
Xuanhe Yang ◽  
Muhua Huang ◽  
...  
Keyword(s):  
Particle Size ◽  
Waterborne Polyurethane ◽  
Close Packing ◽  
Solid Content ◽  
Size Ratio ◽  
Face Centered Cubic ◽  
High Solid Content ◽  
High Solid ◽  
Waterborne Polyurethanes ◽  
Particle Size Ratio

A series of high solid content carboxylic acid/sulfonic acid waterborne polyurethanes was prepared by the emulsion dispersion method. The particle size and solid content were measured. By changing the particle size of the large particles to achieve different particle size ratios, high solid content waterborne polyurethanes were obtained at specific particle size ratios. When the particle size ratio was >7, 4–5 or 2–3, the aqueous polyurethane could reach a higher solid content (more than 56%). This indicated that solid content is related to particle size distribution in high solid content waterborne polyurethane. Moreover, the corresponding three-dimensional stacked models (simple cubic accumulation, face-centered cubic accumulation, cubic close packing and hexagonal closest packing) were established.

Synthesis and Characterization of a Novel Flame Retardant 1,2-Bis (dimelaminium of 1-nitro-3,5-diphospha-4-oxa-3,5-dihydroxy cyclohexane) Ethane and its Application in PP

2013 ◽  
Vol 750-752 ◽  
pp. 1164-1167
Author(s):  
Si Chun Shao ◽  
Yi Lun Tan ◽  
Liu Sun ◽  
Li Hua You ◽  
Zhi Han Peng
Keyword(s):  
Flame Retardant ◽  
Oxygen Index ◽  
The Novel ◽  
Fire Performance ◽  
Limiting Oxygen Index ◽  
H Nmr ◽  
Charring Agent ◽  
Ft Ir ◽  
Tg And Dtg

In this study, a novel flame retardant 1,2-bis (dimelaminium of 1-nitro-3,5-diphospha-4-oxa-3,5-dihydroxy cyclohexane) ethane (EAPM) was synthesized by ethylene diamine tetra (methylene phosphonic) acid (EDTMPA) and melamine in two steps. Meanwhile, its molecular structure was determined by Fourier-transform infrared spectroscopy (FT-IR), elemental analysis, 1H-NMR. The thermal properties were characterized by TG and DTG, which indicated the good thermostability of EAPM for processing and the considerable residual char in the final stage of combustion. The fire performance of composites blended by the novel flame retardant and polypropylene waere investigated by limiting oxygen index (LOI) and vertical burning test. The results demonstrated the treated PP with the optimal flame retardant formulation of 15 w% EAPM, 5 w% charring agent and 10 w% MEL-APP was attached with an LOI of 33.3% and UL-94 V-0 rating.

Synthesis of novel dimeric subphthalocyanines via azide-alkyne Huisgen 1,3-dipolar cycloaddition and palladiumcatalyzed Glaser–Hay coupling reactions

2017 ◽  
Vol 21 (07n08) ◽  
pp. 539-546 ◽  
Author(s):  
Özge Göktuğ ◽  
Cem Göl ◽  
Mahmut Durmuş
Keyword(s):  
Quantum Yields ◽  
Dipolar Cycloaddition ◽  
Coupling Reactions ◽  
The Novel ◽  
Oxygen Generation ◽  
Fluorescence Quantum Yields ◽  
H Nmr ◽  
Fluorescence Measurements ◽  
Palladium Catalyzed ◽  
Ft Ir

In this study, the monomeric subphthalocyanines bearing azido (2) and terminal ethynyl (3) groups were synthesized. These subphthalocyanines were converted to their dimeric derivatives using azide-alkyne Huisgen cycloaddition and palladium-catalyzed Glaser–Hay coupling reactions subphthalocyanine (4) and (5), respectively. The novel subphthalocyanines were fully characterized by elemental analysis and general spectroscopic methods such as MALDI-TOF mass, FT-IR, UV-vis and [Formula: see text]H-NMR. All synthesized subphthalocyanines showed quite good solubility in the most of common organic solvents. The fluorescence measurements were conducted for these subphthalocyanines to estimate their fluorescence quantum yields. The singlet oxygen generation abilities were also examined to investigate their photosensitizer properties.

scholarly journals Synthesis and antimicrobial activity of N-[4-(3-Oxo-3-phenyl-propenyl)-phenyl]-2-(4-phenyl-5-pyridine-4yl-4H-[1,2,4]triazole-3-ylsulfanyl)-acetamide

2017 ◽  
Vol 9 (2) ◽  
pp. 43
Author(s):  
Jyotindra Mahyavanshi ◽  
Maharshi Shukla ◽  
Kokila Parmar
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Nmr Spectroscopy ◽  
The Novel ◽  
H Nmr ◽  
In Vitro Antibacterial Activity ◽  
Ft Ir ◽  
Anti Fungal ◽  
New Compounds

<p class="Default">A new series of<em> </em><em><span>N-</span></em><span>[4-(3-Oxo-3-phenyl-propenyl)-phenyl]-2-(4-phenyl-5-pyridine-4yl-<em>4H</em>-[1,2,4]triazole-3-ylsulfanyl)-acetamide</span> have been synthesized by the claisen-schimodt condensation of <em>N</em>-(4-Acetyl-phenyl)-2-(4-phenyl-5-pyridin-4-yl-4<em>H-</em>[1,2,4]triazole-3-ylsulfanyl) and various aldehyde. The novel compounds structure has been established on the basis of their substituted aldehyde derivatives. All the compounds were characterized by FT-IR, Mass, and <sup>1</sup>H-NMR spectroscopy. These new compounds were evaluated for their in vitro antibacterial activity and anti-fungal activity.</p>

Synthesis, characterization and electrochemistry of the novel metalloporphyrazines annulated with tetrathiafulvalene having pentoxycarbonyl substituents

2010 ◽  
Vol 14 (01) ◽  
pp. 108-114 ◽  
Author(s):  
Fengshou Leng ◽  
Ruibin Hou ◽  
Longyi Jin ◽  
Bingzhu Yin ◽  
Ren-Gen Xiong
Keyword(s):  
Mass Spectra ◽  
Radical Cations ◽  
Molecular Structures ◽  
Metal Salts ◽  
The Novel ◽  
Purification Process ◽  
H Nmr ◽  
Maldi Tof Mass Spectra ◽  
Ft Ir ◽  
Oxidative Processes

Three novel tetrathiafulvalene-annulated metalloporphyrazines with electron-withdrawing pentoxycarbonyl groups at the periphery were synthesized via the cyclotetramerization of dipentyl 6,7-dicyanotetrathiafulvalen-2,3-dicarboxylate in the presence of corresponding metal salts ( Zn(OAc)2·2H2O , Cu(OAc)2·2H2O , and NiCl2 ) and in pentanol. Molecular structures were fully characterized by 1H NMR, FT-IR, UV-vis, MALDI-TOF mass spectra and elemental analysis. These newly synthesized macrocyclic dyes were sufficiently stable in air during the purification process and also in further experiments. Electron-withdrawing substituents reduced the ability of tetrathiafulvalene groups to form radical cations. Solution electrochemical data showed one reductive and three oxidative processes within a -2000 mV to +2200 mV potential window. The four couples observed were assigned to Pz -2/ Pz -3 (I), TTF +•/ TTF (II), TTF +2/ TTF +• (III) and Pz -1/ Pz -2 (IV).

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