Study on Synthesis of a Ampholytic Polyphenylene Sulfide (PPS)

2012 ◽  
Vol 550-553 ◽  
pp. 757-761
Author(s):  
Hui Xiao ◽  
Rui Hai Li
Keyword(s):  
Tertiary Amine ◽  
Quaternary Ammonium ◽  
Polyphenylene Sulfide ◽  
Structure And Properties ◽  
Acid Base ◽  
Sulfonation Degree ◽  
Quaternary Ammonium Group ◽  
Ft Ir ◽  
Amine Groups ◽  
G Ratio

Ampholytic Polyphenylene Sulfide (PPS) was prepared from PPS by sulfonation, followed by bromination and then the substitution of bromine by quaternary ammonium group and tertiary amine group.The structure and properties of polymers were characterized by FT-IR, TGA, UV and isoelectric point(IEP) measurement. The degree of sulfonation and the content of bromide were investigated by acid base titration and Mohr Method respectively. The results indicated that 47.6% sulfonation degree at 4h, 105°C and a 15ml/g ratio of oluem and PPS, 35.25% content of bromide at 4h, 40°C and 4% FeCl3. Bromine is completely substituted by quaternary ammonium groups at a 1:1.2 ratio of P-SO3-Br and volume of trimethylamine,70°C and 4 h,and that by tertiary amine groups at a 1:1.2 ratio of P-SO3-Br and volume of dimethylamine,80°C and 4 h. Ampholytic PPS shows better solubility and thermostability than PPS.Hyperchromic effect: Br < NH(CH3)2 < N(CH3)3. The IEP of P-SO3-TMA and P-SO3-DMA are 4.08 and 3.84 respectively.

scholarly journals Preparation and Properties of Autocatalytic Biobased Waterborne Polyol from Rosin Based Epoxy Resin

2022 ◽  
Author(s):  
Guomin Wu ◽  
Jian Chen ◽  
Zhaozhe Yang ◽  
Can Jin ◽  
Guifeng Liu ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Tertiary Amine ◽  
Reaction Rate ◽  
Waterborne Polyurethane ◽  
Crosslinking Reaction ◽  
Forming Process ◽  
Waterborne Coatings ◽  
Ft Ir ◽  
Amine Groups ◽  
Heterogeneous Film

Abstract Due to the complex heterogeneous film forming process of two-component waterborne polyurethane (2K-WPU), the crosslinking reaction rate of 2K-WPU cannot meet the demand of efficient application in coatings. In order to improve the crosslinking reaction rate of 2K-WPU, a waterborne polyol containing tertiary amine groups was synthesized from rosin based epoxy resin and secondary amine compound, and then autocatalytic 2K-WPU was prepared by crosslinking the rosin based waterborne amino polyol with polyisocyanate. The structure of the polyol from rosin based epoxy resin was characterized with Fourier infrared (FT-IR) and nuclear magnetic resonance (NMR). The crosslinking kinetics and the crosslinked product of the rosin based waterborne amino polyol were also compared with a commercial acrylic polyol. It was shown from the results that the crosslinking reaction rate of the rosin based waterborne amino polyol was faster than that of the commercial acrylic polyol, which indicated the tertiary amine groups chemically bonded in the rosin based polyols could autocatalyze the crosslinking reaction of 2K-WPUs with catalysts free. The film of the rosin based waterborne amino polyol had excellent impact strength, adhesion, flexibility, hardness, gloss, fullness and solvent resistance, showing a good application prospect in the field of waterborne coatings.

scholarly journals Electrochemiluminescence Enhancement and Particle Structure Stabilization of Polymer Nanoparticle by Doping Anionic Polyelectrolyte and Cationic Polymer Containing Tertiary Amine Groups and Its Highly Sensitive Immunoanalysis

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1054
Author(s):  
Noor Ul Ain ◽  
Tian-Yu Wang ◽  
Xiao-Ning Wu ◽  
Tong-Hong Wei ◽  
Jing-Shuo Zhang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Tertiary Amine ◽  
Hepatitis B Surface Antigen ◽  
Particle Diameter ◽  
Cationic Polymer ◽  
Suspension Stability ◽  
Good Precision ◽  
Polymer Nanoparticle ◽  
Anionic Polyelectrolyte ◽  
Amine Groups

A doped polymer nanoparticle (dPNP) of electrochemiluminescence (ECL) was prepared via doping the anionic polyelectrolyte polyacrylic acid (PAA) and the cationic polymer poly-ethyleneimine (PEI) into the polymer nanoparticle (PNP), which was self-assembled by Ru(bpy)32+ derivative-grafted PAA (PAA–Ru) with both cations and anions. The good electrical conductivity of the doped polyelectrolyte PAA enhanced the ECL intensity of PNP to 109.1%, and the involvement of a large number of tertiary amine groups of the doped PEI further enhanced that to 127.3%; meanwhile, doping low-molecular-weight PEI into PNP, while simultaneously doping high-molecular-weight PAA, avoided the precipitation of PAA and PEI, due to interaction of the two oppositely charged polymers; and these also made the self-assembly procedure more effective and the nanoparticle structure more stable than PNP and also led to the production of rich residual PAA chains on the surface of dPNP. The storage results showed that the average hydrated particle diameter kept almost constant (197.5–213.1 nm) during 15-day storage and that the nanoparticles have rich surface charge of −11.47 mV (zeta potential), well suspension stability and good dispersity without detectable aggregation in the solution during the storage. Therefore, the nanoparticle is quite suitable for the antibody labeling, immunoassay and the storage. As a result, a high-sensitive ECL immunoassay approach with good precision, accuracy and selectivity was established and an ultra-low detection limit of 0.049 pg mL−1 (S/N = 3) for magnetic bead-based detection of Hepatitis B surface antigen was observed.

scholarly journals SCREENING FOR PHYTOCHEMICALS AND FTIR ANALYSIS OF MYRISTICA DACTYLOIDS FRUIT EXTRACTS

2016 ◽  
Vol 9 (1) ◽  
pp. 315 ◽  
Author(s):  
P. Rajiv ◽  
A. Deepa ◽  
P. Vanathi ◽  
D. Vidhya
Keyword(s):  
Fourier Transform ◽  
Methanolic Extract ◽  
Phytochemical Analysis ◽  
Ftir Analysis ◽  
Spectroscopy Analysis ◽  
Standard Methods ◽  
Fruit Extracts ◽  
Ft Ir ◽  
Amine Groups ◽  
Ir Analysis

<p><strong>Objective: </strong>The present investigation focus on screening of phytochemicals and FT-IR analysis of <em>Myristica dactyloids </em>fruit extracts. The fruit extracts were prepared using five different solvents.</p><p><strong>Methods: </strong>The phytochemical analysis and FT-IR (Fourier transform infrared spectroscopy) analysis were performed using standard methods.</p><p><strong>Results: </strong>The results reveals that the alkaloids, steroids, flavonoids, phenolic compounds, proteins, carbohydrates, cardio glycosides and saponins were present in methanolic extract when compared to other solvent extracts. FT-IR analysis shows the presence of different functional groups such as carboxylic acids, aromatics, alkanes, alcohols, phenols, aliphatic amines, alkenes and amine groups in the fruit extracts.</p><p><strong>Conclusion: </strong>The study concluded that the methanolic extract (<em>M. dactyloides </em>fruit) has potential bioactive compounds.</p>

scholarly journals Aliphatic Quaternary Ammonium Functionalized Nanogels for Gene Delivery

Pharmaceutics ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1964
Author(s):  
Huaiying Zhang ◽  
Damla Keskin ◽  
Willy H. de Haan-Visser ◽  
Guangyue Zu ◽  
Patrick van Rijn ◽  
...  
Keyword(s):  
Gene Delivery ◽  
Tertiary Amine ◽  
Quaternary Ammonium ◽  
Gene Transfection ◽  
Genetic Material ◽  
Cationic Lipid ◽  
Endosomal Escape ◽  
Hereditary Diseases ◽  
Viral Gene

Gene therapy is a promising treatment for hereditary diseases, as well as acquired genetic diseases, including cancer. Facing the complicated physiological and pathological environment in vivo, developing efficient non-viral gene vectors is needed for their clinical application. Here, poly(N-isopropylacrylamide) (p(NIPAM)) nanogels are presented with either protonatable tertiary amine groups or permanently charged quaternized ammonium groups to achieve DNA complexation ability. In addition, a quaternary ammonium-functionalized nanogel was further provided with an aliphatic moiety using 1-bromododecane to add a membrane-interacting structure to ultimately facilitate intracellular release of the genetic material. The ability of the tertiary amine-, quaternized ammonium-, and aliphatic quaternized ammonium-functionalized p(NIPAM) nanogels (i.e., NGs, NGs-MI, and NGs-BDD, respectively) to mediate gene transfection was evaluated by fluorescence microscopy and flow cytometry. It is observed that NGs-BDD/pDNA complexes exhibit efficient gene loading, gene protection ability, and intracellular uptake similar to that of NGs-MI/pDNA complexes. However, only the NGs-BDD/pDNA complexes show a notable gene transfer efficiency, which can be ascribed to their ability to mediate DNA escape from endosomes. We conclude that NGs-BDD displays a cationic lipid-like behavior that facilitates endosomal escape by perturbing the endosomal/lysosomal membrane. These findings demonstrate that the presence of aliphatic chains within the nanogel is instrumental in accomplishing gene delivery, which provides a rationale for the further development of nanogel-based gene delivery systems.

Structure and Properties of Modifier for Heat Transfer Printing on Cotton Fabric

2011 ◽  
Vol 331 ◽  
pp. 426-429
Author(s):  
Yi Mu ◽  
Lan Wang ◽  
Ming Hua Wu ◽  
Jun Xiong Lin
Keyword(s):  
Heat Transfer ◽  
Spherical Shape ◽  
Decomposition Temperature ◽  
Polymerization Process ◽  
Structure And Properties ◽  
Transfer Printing ◽  
Transmission Electron ◽  
Ft Ir ◽  
Regular Spherical Shape

Modifier for heat transfer printing on cotton fabrics was prepared by semi-continuous emulsion polymerization process with butyl acrylate (BA), styrene (St), acrylonitrile (AN) and cross-linking monomer. FT-IR characterization of modifier groups showed that individual monomer well carried out polymerization. Transmission electron microscopy (TEM) photos demonstrated that latex particles had regular spherical shape and uniform distribution. TGA curves indicated that thermal decomposition temperature of modifier was 439 oC. As for the transfer printing products had good colour fastness, high transfer rate and no formaldehyde.

Study on the preparation and properties of polyamide/chitosan nanocomposite fabricated by electrospinning method

2021 ◽  
Author(s):  
Mahyar Fazeli ◽  
Faegheh Fazeli ◽  
Tamrin Nuge ◽  
Omid Abdoli ◽  
Shokooh Moghaddam
Keyword(s):  
Structural Characteristics ◽  
Decomposition Temperature ◽  
X Ray Diffraction ◽  
Good Adhesion ◽  
Sem Images ◽  
Electrospinning Method ◽  
Maximum Current ◽  
The Matrix ◽  
Ft Ir ◽  
Amine Groups

Abstract The principal intention of this work is to fabricate and characterize the polyamide/chitosan nanocomposite by a novel single solvent method through the electrospinning procedure. The thermal properties and morphology of prepared nanocomposite are studied by thermogravimetric analysis (TGA) and field-emission scanning electron microscopy (FE-SEM). TGA exposed that the primary decomposition temperature is reduced with rising of chitosan content in the nanocomposites and origin disintegration temperature for polyamide/chitosan nanocomposites is perceived to be in the range from 300 to 500°C. Also, FE-SEM images demonstrated that the nanofibers of chitosan have good adhesion on the matrix and are well-oriented. Besides, the crystallinity and structural characteristics of the polyamide/chitosan nanocomposites are investigated by using X-ray diffraction (XRD) and Fourier transform-infrared spectroscopy (FT-IR), respectively. The results of XRD proved that the successful blending of chitosan in polyamide is achieved via the electrospinning method. FT-IR results demonstrate that the nanofibers are consist of amine groups. Also, the electrical properties of the nanocomposite improved with the increasing content of chitosan and the conductivity of the polyamide/chitosan 5 wt% demonstrates the maximum current of 0.3 nA. Besides, the sheet resistance of the composite reduced 118 to 20 × 109 Ω with raising the chitosan volume from 0 to 5 wt%.

Studies of FT-IR-PAS Spectra of Polyphenylene Sulfide

1989 ◽  
Vol 5 (01) ◽  
pp. 91-94
Author(s):  
Zhang Gui-Zhong ◽  
◽  
Li Zeng-Fa ◽  
Zhang Guang-Yin ◽  
Zeng Han-Min
Keyword(s):  
Polyphenylene Sulfide ◽  
Ft Ir
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