scholarly journals Synthesis and characterization of different soybean oil-based polyols with fatty alcohol and aromatic alcohol

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 491-499
Author(s):  
Fukai Yang ◽  
Hao Yu ◽  
Yuyuan Deng ◽  
Xinyu Xu
Keyword(s):  
Molecular Weight ◽  
Soybean Oil ◽  
Retention Time ◽  
Ring Opening ◽  
Isoamyl Alcohol ◽  
Synthesis And Characterization ◽  
Intermolecular Force ◽  
H Nmr ◽  
Epoxy Groups

Abstract In this article, five kinds of soybean oil-based polyols (polyol-E, polyol-P, polyol-I, polyol-B, and polyol-M) were prepared by ring-opening the epoxy groups in epoxidized soybean oil (ESO) with ethyl alcohol, 1-pentanol, isoamyl alcohol, p-tert-butylphenol, and 4-methoxyphenol in the presence of tetrafluoroboric acid as the catalyst. The SOPs were characterized by FTIR, 1H NMR, GPC, viscosity, and hydroxyl numbers. Compared with ESO, the retention time of SOPs is shortened, indicating that the molecular weight of SOPs is increased. The structure of different monomers can significantly affect the hydroxyl numbers of SOPs. Due to the large steric hindrance of isoamyl alcohol, p-hydroxyanisole, and p-tert-butylphenol, SOPs prepared by these three monomers often undergo further dehydration to ether reactions, which consumes the hydroxyl of polyols, thus forming dimers and multimers; therefore, the hydroxyl numbers are much lower than polyol-E and polyol-P. The viscosity of polyol-E and polyol-P is much lower than that of polyol-I, polyol-B, and polyol-M. A longer distance between the molecules and the smaller intermolecular force makes the SOPs dehydrate to ether again. This generates dimer or polymers and makes the viscosity of these SOPs larger, and the molecular weight greatly increases.

scholarly journals Synthesis and Characterization of Polyphosphazenes Modified with Hydroxyethyl Methacrylate and Lactic Acid

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Evelyn Carolina Martínez Ceballos ◽  
Ricardo Vera Graziano ◽  
Gonzalo Martínez Barrera ◽  
Oscar Olea Mejía
Keyword(s):  
Lactic Acid ◽  
Ring Opening ◽  
Room Temperature ◽  
Block Structure ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization ◽  
Poly Lactic Acid ◽  
Hydroxyethyl Methacrylate ◽  
H Nmr

Poly(dichlorophosphazene) was prepared by melt ring-opening polymerization of the hexachlorocyclotriphosphazene. Poly[bis(2-hydroxyethyl-methacrylate)-phosphazene] and poly[(2-hydroxyethyl-methacrylate)-graft-poly(lactic-acid)-phosphazene] were obtained by nucleophilic condensation reactions at different concentrations of the substituents. The properties of the synthesized copolymers were assessed by FTIR,1H-NMR and31P-NMR, thermal analysis (DSC-TGA), and electron microscopy (SEM). The copolymers have a block structure and show twoTg's below room temperature. They are stable up to a temperature of 100°C. The type of the substituents attached to the PZ backbone determines the morphology of the polymers.

Synthesis and Characterization of Alkyd Resin Based on Soybean Oil Polyols

2011 ◽  
Vol 239-242 ◽  
pp. 1721-1724 ◽  
Author(s):  
Xiao Qing Zheng ◽  
Li Ting Yang ◽  
Kun Peng Wang
Keyword(s):  
Maleic Anhydride ◽  
Soybean Oil ◽  
Phthalic Anhydride ◽  
Alkyd Resin ◽  
Ring Opening ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
Hydroxyl Value

Soybean oil-based alkyd resin was prepared using soy-based polyol, maleic anhydride and phthalic anhydride. The soy-based polyol was obtained through the epoxidization of soybean oil, followed by ring-opening with methanol and, the hydroxyl values of soybean oil-based polyols used in this reaction is 169.93 mgKOH/g. In the reactions of soy-based polyol, maleic anhydride and phthalic anhydride, the molar ratio of hydroxyl value is equal to carboxyl value and the molar ratio of maleic anhydride to phthalic anhydride is 2:1, 1:1 and 1:2, respectively. 1% hydroquinone based on total reactants was used as inhibitor of polymerization, 1% dibutyltin oxide was used as catalyst.

Synthesis and characterization of polyvinylmethylsiloxanes by cationic polymerization using a solid green catalyst

e-Polymers ◽  
2017 ◽  
Vol 17 (5) ◽  
pp. 439-448 ◽  
Author(s):  
Djamal Eddine Kherroub ◽  
Mohammed Belbachir ◽  
Saad Lamouri
Keyword(s):  
Ring Opening ◽  
Polymeric Materials ◽  
Synthesis And Characterization ◽  
Green Catalyst ◽  
Characterization Methods ◽  
H Nmr ◽  
New Strategy ◽  
Cationic Ring Opening Polymerization ◽  
C Nmr

AbstractThe present work is devoted to the synthesis and characterization of vinylsiloxane polymers produced by the use of an activated natural catalyst known as Maghnite-H+. The cationic ring opening polymerization of pentavinylpentamethylcyclopentasiloxane (V5D5) made it possible to obtain the desired polymeric materials. Through this study, we have adapted a new strategy of synthesis of a siloxane polymer with relatively high molecular mass, using a solid initiator activated by sulfuric acid, which has enabled us to combine the ecological aspect of synthesis and the effectiveness of the catalyst in this kind of reaction. Structural [infrared (IR), proton and carbon nuclear magnetic resonance (1H NMR and 13C NMR)], thermal differential scanning (DSC) and chromatographic (GPC) characterization methods have allowed the products obtained to be identified and their various properties to be focused on. The kinetic study was made to determine the order of the reaction. The proposed reaction mechanism shows the advantages of Maghnite-H+.

scholarly journals INVESTIGATION OF BIOPLASTIC PROPERTIES DEVELOPED FROM ACRYLATE EPOXIDIZED SOYBEAN OIL THROUGH RING OPENING POLYMERIZATION PROCESS

1970 ◽  
Vol 1 (1) ◽  
pp. 29-41 ◽  
Author(s):  
Hiew Ming Yu ◽  
Arun Gupta ◽  
Ritu Gupta ◽  
Saad Bala Husain
Keyword(s):  
Mechanical Properties ◽  
Soybean Oil ◽  
Ring Opening ◽  
Unsaturated Fatty Acids ◽  
Ring Opening Polymerization ◽  
Epoxidized Soybean Oil ◽  
Polymerization Process ◽  
Synthesis And Characterization ◽  
Glycerol Concentration

Soybean oil is one of the major vegetable oils containing more than 99% of triglycerides of saturated and unsaturated fatty acids and has become an interesting source to produce bioplastic. This study investigates the synthesis and characterization of bioplastic developed by the acrylate epoxidized soybean oil through ring opening polymerization process. The mechanical properties of the samples were characterized using Fourier Transform Infrared Spectroscopy, Thermogravimetric analysis and the physio-chemical properties of the bioplastics were studied. In this study, the bioplastic made up from soybean oil with the lowest glycerol concentration showed the best mechanical properties.

Synthesis and characterization of new phenanthrolinetriether copolymers with rotaxane architecture

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
Aurica Farcas ◽  
Valeria Harabagiu
Keyword(s):  
Thermal Stability ◽  
Molecular Weight ◽  
Ethylene Glycol ◽  
Synthesis And Characterization ◽  
Nmr Analysis ◽  
H Nmr ◽  
Molecular Weight Distributions ◽  
Weight Distributions ◽  
Different Content

AbstractThis paper is devoted to the preparation and characterization of new phenanthroline-triether copolymers with rotaxane architecture by reaction of complexes of α- or β- cyclodextrin and tri(ethylene glycol) ditosylate with 2,9-di(4-hydroxyphenyl)-1,10- phenanthroline, which is large enough to prevent dethreading of cyclodextrin molecules. Comparative 1H-NMR analysis of tri(ethylene glycol) ditosylate complexes and of rotaxane copolymers evidenced the lower cyclodextrin content in rotaxane copolymers as compared to the calculated values. The rotaxane copolymers present bimodal molecular weight distributions attributed to the separation of the fractions with different content of cyclodextrin threaded on the copolymer chain. As evidenced by thermogravimetric analysis, the rotaxane copolymers show higher thermal stability than its non-complexed homologue.

Synthesis and Characterization of Polythiophene Derivatives with Different Alkyl Substitution Groups

2015 ◽  
Vol 815 ◽  
pp. 477-482
Author(s):  
Wei Xing Chen ◽  
Yong Qiang Gu ◽  
Chun Yan Luo ◽  
Xiao Long Zhang
Keyword(s):  
Molecular Weight ◽  
Synthesis And Characterization ◽  
H Nmr ◽  
Chemical Structures ◽  
Molecular Weight Distributions ◽  
Alkyl Substitution ◽  
Weight Distributions ◽  
Maximum Absorption Wavelength ◽  
Uv Absorption Spectrum

Three kinds of poly (3-alkylthiophene), such as poly (3-butylthiophene) (P3BT), poly (3-hexylthiophene) (P3HT) and poly (3-dodecylthiophene) (P3DDT) were prepared by the Grignard Metathesis Method (GRIM). Their chemical structures are characterized by FTIR,1H-NMR and GPC.1H-NMR result shows that regioregular structure of these polymers is relatively higher. The GPC results show that the molecular weight of the polymers is 8.42×104, 1.06×105and 1.21×104g/mol with molecular weight distributions of 1.41, 2.18 and 1.18, respectively. The DSC result shows that the glass transition temperature of three kinds of polymers is 120.8, 146, 118 °C, respectively. UV absorption spectrum and fluorescence spectroscopy of three polymers in THF solution show that the maximum absorption wavelength is 448 nm, 470 nm, 390 nm, and the maximum emission wavelength is 531, 535, 527 nm with the band gap of 2.06, 1.86, 2.21 eV, respectively.

Synthesis and characterization of a polyferrocenyldistannane

2014 ◽  
Vol 92 (6) ◽  
pp. 525-532 ◽  
Author(s):  
Jon Ward ◽  
Saif Al-Alul ◽  
Shane Harrypersad ◽  
Daniel A. Foucher
Keyword(s):  
Molecular Weight ◽  
Elemental Analysis ◽  
Ring Opening ◽  
Electronic Communication ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization ◽  
Vis Spectroscopy ◽  
Metal Catalyzed

The distannyl-bridged poly bis(dimethylstannyl)ferrocene, 5, was synthesized through either the metal-catalyzed intermolecular dehydrogenative condensation of the bis(dimethylstannyl)ferrocene, 6, or the ring-opening polymerization of the distannane-bridged [2]ferrocenophane, 7. Both polymerization strategies yielded compounds displaying NMR (1H, 13C, 119Sn) evidence for a distannane bridged polymer. A modest moderate molecular weight (GPC; Mw = 9.5 × 104 Da, PDI = 1.76) was found for polymer 5 prepared by dehydrogenative condensation. Polymer 5 displayed electronic communication (≈ 0.2 V) between neighbouring iron centers, similar to those reported for monobridged ferrocenyl stannane polymers. Polymer 5 was further characterized by UV–vis spectroscopy, elemental analysis, and modeled with the related distannyl-8 and tristannyl-9 bisferrocenes using DFT at the SDD level of theory.

Synthesis and Characterization of a Novel Biodegradable Polymer with Fluorescence Property

2011 ◽  
Vol 197-198 ◽  
pp. 21-26
Author(s):  
Ji Hang Li ◽  
Dong Jian Shi ◽  
Na Hu ◽  
Wei Fu Dong ◽  
Jun Feng Li ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ring Opening ◽  
Gel Permeation Chromatography ◽  
Ring Opening Polymerization ◽  
Fluorescence Property ◽  
H Nmr ◽  
Gel Permeation ◽  
Fluorescent Polymer ◽  
Poor Solvent

In this paper, a novel biodegradable and fluorescent polymer: fluorescein-polylactide (FL-PLA) was synthesized by FL and lactide in the method of ring-opening polymerization with the catalysis of Sn(Oct)2under 130°C . The structure and molecular weight of FL-PLA were characterized by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (1H-NMR) spectroscopy, and gel permeation chromatography (GPC). The molecular weight of FL-PLA increased from 9.03×103to 21.24×103with decreasing the amount of FL and kept a narrow distribution. The result of differential scanning calorimeter (DSC) showed that Tgincreased from 52 to 72°C with increasing the molecular weight of polymer. Moreover, the average number content of FL in each molecular chain decreased from 0.96 to 0.81 with decrement of the amount of FL. Furthermore, FL-PLA showed the fluorescence property, and the fluorescence intensity could be controlled by the amount of FL. The FL-PLA nanoparticles were prepared by mixing the good and poor solvent, and the diameter was about 3 μm with regular spherical morphology.

Synthesis and Characterization of 5-Fluorouracil and Polyethylene Glycol Esters as Prodrugs

2011 ◽  
Vol 287-290 ◽  
pp. 1509-1512 ◽  
Author(s):  
Cheng Wu Li ◽  
Gang Li ◽  
Ji Cheng Zuo
Keyword(s):  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Water Solubility ◽  
Uv Spectroscopy ◽  
Chloroacetic Acid ◽  
Synthesis And Characterization ◽  
Drug Release Rate ◽  
H Nmr ◽  
Ft Ir

A series of novel polyethylene glycol derivates was synthesized by esterification of chloroacetic acid with polyethylene glycol.The PEG-5-FU conjugates were characterized by FT-IR,1H-NMR and UV spectroscopy. The result showed that 5-FU was successfully connected to the ends of PEG ester. Drug content of PEG2000-5-FU conjugate achieved 17.4%. As the molecular weight of PEG increased, the water solubility of prodrugs improved. When the molecular weight of PEG reached 2000, the conjugate had the best water solubility and the highest drug release rate.

Synthesis and characterization of high molecular weight phthalocyanine-PPV copolymers through post-polymerization functionalization

2011 ◽  
Vol 15 (07n08) ◽  
pp. 659-666 ◽  
Author(s):  
Juan-José Cid ◽  
Jan Duchateau ◽  
Ineke Van Severen ◽  
Carolina R. Ganivet ◽  
Gema de la Torre ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Soluble Fraction ◽  
Synthesis And Characterization ◽  
H Nmr ◽  
Ft Ir ◽  
Copolymer 1 ◽  
High Molecular Weight Poly

High molecular weight poly(p-phenylenenevinylene) PPV copolymers laterally substituted with zinc (II) phthalocyanines ( Zn(II)Pc -PPV 1 and 2) have been synthesized by means of post-polymerization functionalization reactions through DCC-mediated esterifications between hydroxy-phthalocyanines 4 and 6 and carboxy-bearer PPV copolymers, comprising 2-methoxy-5-(3,7-dimethyloctyloxy)-1,4-phenylenevinylene (MDMO-PPV) and 1,4-(2-(5-carboxypentyloxy)-5-methoxyphenylenevinylene (CPM-PPV) units in a 9:1 (3) and 1:1 (5) ratio, respectively. The resulting copolymer 1 contains a 7 mol % of Pc molecules, while copolymer 2, which is isolated as the soluble fraction of the reaction with the starting 1:1 copolymer (namely having around 50% of COOH -containing monomeric units), holds a 9 mol % of zinc(II) phthalocyanines. 1 and 2 were fully characterized by 1H NMR, UV-vis and FT-IR spectroscopies.

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