Synthesis of Quaternary Ammonium Cationic Polymer PEA

2013 ◽  
Vol 690-693 ◽  
pp. 1599-1603
Author(s):  
Rong Ming Zhang ◽  
Hong Man Shan ◽  
Min Zhao ◽  
Dong Hui Ma ◽  
Wei Li
Keyword(s):  
Reaction Time ◽  
Water Absorption ◽  
Reaction Temperature ◽  
Quaternary Ammonium ◽  
Ring Opening ◽  
Cationic Polymer ◽  
Ring Opening Reaction ◽  
Epoxy Value ◽  
Polymerization Conditions

The cationic polymer PEA was synthesized by ring-opening reaction and quaterisation with epichlorohydrin and β-hydroxy alkyl propyl ether amine as the main materials.Study on the efffect of rate of charge, reaction time and reaction temperature on cationic degree and epoxy value. Capability of adsorption on the sand and anti-swelling resistance were studied. The results showed that the best polymerization conditions as follows,reaction temperature was 60 °C, reaction time was 6 h, the rate of charge of epichlorohydrin toβ-hydroxy alkyl propyletheramine was 2.5:1. Under these conditions , the cationic degree of PEA was 3.962 mmol/g, epoxy value was 0.12. Then it was performed the water absorption.

The Synthesis of Cephalosporin Intermediates THZ

2013 ◽  
Vol 709 ◽  
pp. 801-804
Author(s):  
Cheng Xue Wang ◽  
Xu Feng Liu ◽  
Zhen Ma
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Elemental Analysis ◽  
Ring Opening ◽  
Penicillin G ◽  
Temperature Reaction ◽  
Ring Opening Reaction ◽  
Ft Ir

Starting from Penicillin G,the THZ was synthesized through three main steps:esterification,oxidation and ring-opening. The effects of various reaction temperature,reaction time and ratio of reactants on the ring-opening reaction were investigated.The yields of its three step reaction are 91%,95.8% and 77.3%,respectively.The products were characterized by FT-IR,HNMR,Elemental analysis and MS. At 90~95°C and 0.04~0.05Mpa, the yield of THZ was 77.3%.

Ring-Opening Polymerization of Lactide Using Aluminum Salen-Type Initiators

2014 ◽  
Vol 915-916 ◽  
pp. 713-716
Author(s):  
Qing Zhang ◽  
Jing Tian ◽  
Zhi Qi Cao ◽  
Ru Xia Xu ◽  
Zhen Zhen Sun ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Infrared Spectroscopy ◽  
Reaction Time ◽  
Magnetic Resonance ◽  
Schiff Bases ◽  
Reaction Temperature ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Resonance Spectroscopy ◽  
Aluminum Complex

In this investigation, Schiff bases aluminum complex was synthesized and used as the initiator in the polymerization of D,L-lactide. The aluminum complex was characterized by infrared spectroscopy (IR), and nuclear magnetic resonance spectroscopy (NMR). The influences of different factors, including reaction time, reaction temperature, and the ratio of D, L-lactide/Al3+ on the synthesis of polylactide were described. The results showed that Schiff bases aluminum complex could be successfully applied in the ring opening polymerization. The optimum condition of the ring opening polymerization of D,L-lactide, which included D,L-lactide/Al3+ (mol/mol) ratio of 250, reaction temperature of 120 °C, and reaction time of 16 hours.

Synthesis and Properties of a Novel Cationic Polymer PTMAEPAC

2012 ◽  
Vol 602-604 ◽  
pp. 739-742
Author(s):  
Rui Xia Niu ◽  
Bo Lin Li ◽  
Biao Long
Keyword(s):  
Reaction Time ◽  
Nitrogen Atom ◽  
Ammonium Chloride ◽  
1H Nmr ◽  
Reaction Temperature ◽  
Raw Materials ◽  
Cationic Polymer ◽  
Side Chain ◽  
Nmr Analysis ◽  
Copolymerization Reaction

Poly(bis(2-(trimethylamino)ethyl) 2-hydroxyl propylidene ammonium) chloride (PTMAEPAC) is one kind of oligomeric cationic polymer with a quarter nitrogen atom on its main and side chain. It was synthesized from Bis(2-trimethyl ammonium)ethyl ammonium chloride (TMAEAC) and epichlorohydrin (ECH) by copolymerization reaction, effects of reaction temperature, mole ratio of raw materials, reaction time, amount of solvent on the cationicity of product were studied. The structure of PTMAEPAC was confirmed by IR and 1H-NMR, and its anti-clay-expanding ability was studied. The results show that the cationicity of PTMAEPAC can reach 83.9% with the reaction time of 6h at 65°C when TMAEAC-to-ECH mole ratio is 1.2:1 and the amount of solvent is 30% in total. According to the IR and NMR analysis the product has the same structure with the aim compound. When the content of the product is 3 wt% it has a good anti-clay-expanding ratio of 96.1%.

scholarly journals NOVEL PALM OIL BASED POLYOLS WITH AMINE FUNCTIONALITY SYNTHESIS VIA RING OPENING REACTION OF EPOXIDIZED PALM OIL

2018 ◽  
Vol 80 (6) ◽  
Author(s):  
Sabrina Soloi ◽  
Rohah Abdul Majid ◽  
Abdul Razak Rahmat
Keyword(s):  
Reaction Time ◽  
Palm Oil ◽  
Ring Opening ◽  
Market Price ◽  
Chemical Properties ◽  
Oxirane Ring ◽  
Epoxidized Palm Oil ◽  
Ring Opening Reaction ◽  
Twin Band ◽  
Physical And Chemical

In polymer chemistry, polyol usually used as starting materials for polyurethane (PU) production in which upon reacted with isocyanate will affect the physical and chemical properties of the obtained PU. Polyols that are mostly derived from petrochemical resources are facing issues such as depletion of petroleum sources as well as the increasing in market price. Ring opening reaction (ROR) of epoxidized palm oil (EPO) had been carried out using isopropanolamine (IPA) to impart polyol with amine functionality. The effect of reaction time on the opening of oxirane ring was investigated. FTIR spectra showed that the oxirane ring opening of EPO can occur at 6 hours reaction time, corresponding to the deacreasing intensity of  oxirane COO twin band at 824-830 cm-1. The OH value of the amine- functionalized-polyol was calculated at around 240-253 mg KOH/g. By prolonging the reaction time the OH value has slightly reduced. Mass spectroscopy analysis revealed that the polyol has a molecular weight in the range of oligo-polyols (400 – 500 Da).

Modification of Used Palm Oil: Preliminary Study of its Potentiality as Polyurethane Foam Precursors

2016 ◽  
Vol 705 ◽  
pp. 50-54
Author(s):  
Duangporn Riyapan ◽  
Nitinart Saetung ◽  
Anuwat Saetung
Keyword(s):  
Reaction Time ◽  
Palm Oil ◽  
Ring Opening ◽  
Chemical Structure ◽  
Increase Reaction Time ◽  
H Nmr ◽  
Pu Foam ◽  
Ring Opening Reaction ◽  
Preliminary Study ◽  
Used Palm Oil

Polyol was successfully synthesized from used palm oil (UPO) via epoxidation and ring opening reaction. The mole ratio of UPO: formic acid: hydrogen peroxide was 0.3: 8: 1.5. The reaction had been continuously stirred at 400 rpm at 65°C with varied reaction time for 0.5, 1.0, 1.5, 2.0, and 4.0 h. The chemical structure of modified used palm oil (MUPO) or polyol was confirmed by 1H-NMR. OH number of polyols increased with an increase reaction time. Moreover, the preliminary study for the preparation of MUPO-based polyurethane (PU) foam was performed. A new MUPO-based PU foam was successfully prepared and theirs foam behaviors were investigated.

Synthesis, Characterization and Properties of Tri-n-octylmethyl-ammonium Methyl Carbonate

2013 ◽  
Vol 781-784 ◽  
pp. 263-271
Author(s):  
Kui Fang Zhang ◽  
Zuo Ying Cao ◽  
Gui Qing Zhang ◽  
Lian Sheng Xiao ◽  
Xiao Zhou Zhou
Keyword(s):  
Reaction Time ◽  
Ammonium Salt ◽  
Reaction Temperature ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Dimethyl Carbonate ◽  
Volume Fraction ◽  
Feed Solution ◽  
Molar Ratio ◽  
Methyl Carbonate

The tri-n-octylmethyl-ammonium methyl carbonate was synthesized via a high pressure process with tri-n-octylamine(tri-C8) and dimethyl carbonate(DMC) in the catalysis of tri-n-octylmethyl-ammonium bromine, and its chemical structure was confirmed using FTIR spectroscopic analysis. The influence of reactants molar ratio, reaction temperature, solvent, catalyst and reaction time on the quaternization reaction were examined, and the optimal conditions were that dimethyl carbonate(DMC):tri-n-octylamine(tri-C8)=5.6:1(molar:molar), methanol:tri-n-octylamine (tri-C8)=1:2 (volume:volume), catalysts 5% of the weight of reactant mixtures(materials fraction), reaction temperature 110°C and reaction time 8 h. Under the optimum conditions, the highest conversion rate of tri-n-octylamine(tri-C8) could reach 99.57%. A type of SO42- quaternary ammonium salt was prepared by the reaction between the product and H2SO4, and its properties on extracting vanadium in the feed solution from autoclave-soda leach solution of stone coal was researched, demonstrating that with 8% the type of SO42- quaternary ammonium salt(QAS) and 5% sec-octyl alcohols dissolved in 87% sulphonated kerosene as extractant (volume fraction), the saturated loading capacity for V2O5 reaches 14.32 g/L.

scholarly journals Walnut Shell Modified by Thionyl Chloride and Triethylamine: Synthesis and Characterization

2020 ◽  
pp. 38-45
Author(s):  
Zhijie Mao ◽  
Zuoxiang Zeng ◽  
Weilan Xue ◽  
Ying Wang
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Thionyl Chloride ◽  
Quaternary Ammonium ◽  
Walnut Shell ◽  
Synthesis And Characterization ◽  
Second Step ◽  
Dye Wastewater ◽  
Experimental Conditions ◽  
Methyl Pyrrolidone

A novel modified walnut shell (TWNS) was prepared through sequentially reacting the walnut shell (WNS) with thionyl chloride and triethylamine in N-methyl pyrrolidone to remove Reactive Brilliant Blue from dye wastewater. Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) were used to characterize the TWNS. The effects of different experimental conditions such as the reaction temperature, the reaction time, the dosage of thionyl chloride and triethylamine on the quaternary ammonium grafting percentage of TWNS have been studied. The results reveal the quaternary ammonium grafting percentage (Y) is up to 18.37% when the dosage of thionyl chloride (V1) is 35 mL, the reaction time (t1) is 3 h in the first step reaction; the dosage of triethylamine (V2) is 40 mL, the reaction temperature (T) is 80°C and the reaction time (t2) is 12 h in the second step reaction.

Study of Salen(Al) Complex Catalytic System in Ring-Opening Polymerization of Lactide

2015 ◽  
Vol 1095 ◽  
pp. 407-410
Author(s):  
Yun Nie ◽  
Jing Tian ◽  
Qing Zhang ◽  
Meng Fei Du ◽  
Xiao Lun Hao ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Infrared Spectroscopy ◽  
Reaction Time ◽  
Magnetic Resonance ◽  
Optimum Condition ◽  
Catalytic System ◽  
Reaction Temperature ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Resonance Spectroscopy

In this paper, salen (Al) complex catalytic system was synthesized and used in the polymerization of lactide. The salen (Al) complex catalytic system was characterized by infrared spectroscopy (IR), and nuclear magnetic resonance spectroscopy (NMR). The influences of different factors, including reaction time, reaction temperature, and the ratio of lactide/Al3+ on the synthesis of polylactide were also described in the investigation. The results showed that the complex catalytic system could be successfully applied in the ring opening polymerization. The optimum condition of the ring opening polymerization of lactide, which included lactide/Al3+ (mol/mol) ratio of 300, reaction temperature of 140 °C, and reaction time of 12 hours.

scholarly journals Optimization of Reactions Opening Cyclic Ring of Pentose Sugar Derivatives through Dithioacetalisation Reactions

2017 ◽  
Vol 17 (2) ◽  
pp. 79
Author(s):  
Nuriman Nuriman
Keyword(s):  
Reaction Time ◽  
Ring Opening ◽  
Solvent Mixture ◽  
Reaction Products ◽  
Reaction Conditions ◽  
Ring Opening Reaction ◽  
Pentose Sugar ◽  
Sugar Derivatives ◽  
Derivatives Of ◽  
Better Than

Ring-opening reaction of cyclic pentose sugar derivatives of 2,3,4-Tri-O-benzyl- D-xylopyranoseto derivatives of acyclic 2,3,4-Tri-O-benzyl-D-xylose-Dipropyl dithioacetal been done andoptimized. The reaction was performed using a precursor propanathiol with concentrated HCl.Optimization of reaction conditions was conducted by varying propanathiol concentration,reaction time and optimization of the reaction temperature which the product ioslation conductedusing a variety of solvents. The results of this reaction was obtained 2,3,4-Tri-O-benzyl- Dxylose-Dipropyl dithioacetal with the highest randemen (97%), better than the previous reactionthrough propanathiol excessive concentration, reaction time of 2 hours and the temperature of thereaction at room temperature. Product Isolations using solvent dikloromathane more effectivethan the use of other organic solvents. Purification of reaction products is done through a columnchromatography using a solvent mixture of 20% ethyl acetate-hexane.Keywords: Optimization, Cyclic Ring, Dithioasetalisasi 

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