scholarly journals Preparation and Characterization of Some Hyperbranched Polyesteramides/Montmorillonite Nanocomposites

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Amal Amin ◽  
Moshera Samy
Keyword(s):  
Maleic Anhydride ◽  
Phthalic Anhydride ◽  
Succinic Anhydride ◽  
Thermal Analyses ◽  
Hyperbranched Polymers ◽  
H Nmr ◽  
Tga And Dsc ◽  
Montmorillonite Nanocomposites

Different polyesteramides hyperbranched polymers (HPEA1-6)/montomorillonite clay (MMT) nanocomposites were prepared with three different loading contents of clay (4, 10, and 15 wt%). The obtained nanocomposites were characterized via XRD, thermal analyses, and TEM. Generally, intercalation behavior was observed. The hyperbranched polyesteramides (HPEA1-6) were originally prepared by the bulky reaction between maleic anhydride (MAn), succinic anhydride (ScAn), and phthalic anhydride (PhAn) with either diethanolamine (DEA) or diisopropanolamine (DiPA). The resulting hyperbranched polyesteramides (HPEA1-6) were characterized by GPC, IR,1H-NMR, TGA, and DSC.

scholarly journals Microwave-assisted synthesis and characterization of some optically active poly(ester-imide) thermoplastic elastomers

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Saeed Zahmatkesh ◽  
Abdol Reza Hajipour
Keyword(s):  
Thermal Analyses ◽  
Specific Rotation ◽  
Thermoplastic Elastomers ◽  
Optically Active ◽  
Microwave Assisted Synthesis ◽  
H Nmr ◽  
Microwave Assisted ◽  
Diacid Chloride ◽  
Elemental Analyses

AbstractPyromellitic dianhydride (1) was reacted with L-leucine (2) to result in [N,N'-(pyromellitoyl)-bis-L-leucine diacid] (3). This compound (3) was converted to N,N'-(pyromellitoyl)-bis-L-leucine diacid chloride (4) by reaction with thionyl chloride. The microwave-assisted polycondensation of this diacid chloride (4) with polyethyleneglycol-diol (PEG-200) and/or three synthetic bisphenols furnish a series of new PEIs and Co-PEIs in a laboratory microwave oven (Milestone). The resulting polymers and copolymers have inherent viscosities in the range of 0.31- 0.53 dl g-1. These polymers are optically active, thermally stable and soluble in polar aprotic solvents such as DMF, DMSO, NMP, DMAc and sulfuric acid. All of the above polymers were fully characterized by IR spectroscopy, 1H NMR spectroscopy, elemental analyses, specific rotation and thermal analyses. Some structural characterizations and physical properties of these optically active PEIs and Co-PEIs are reported.

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.

Preparation and Characterization of Terpene-Based Diol from Terpene-Maleic Anhydride Using Lithium Aluminum Hydride as Reductant

2013 ◽  
Vol 721 ◽  
pp. 266-269
Author(s):  
Xiao Dong Tang ◽  
Jian Ling Xia ◽  
Shou Hai Li ◽  
Kun Huang ◽  
Mei Li ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Aluminum Hydride ◽  
Raw Material ◽  
Lithium Aluminum ◽  
The Novel ◽  
Synthesis Conditions ◽  
H Nmr ◽  
Optimum Synthesis ◽  
Lithium Aluminium

A Diol with endocyclic structure that is 1-methyl-4-isopropyl-bicyclo [2,2,-2,3-two hydroxymethyl-5-Octene (MIBHO), deriving from terpene, was synthesized using the aid of lithium aluminium hydride (LAH) as reductant in THF media at 65 °C. The optimum synthesis conditions were confirmed by analysing the factors on reacting temperature, reacting time, different solvents and reductants. The molecular structure of the novel compound has been characterized by FT-IRGC-MS and 1H-NMR analysis. The data reveal that LAH could effectively reduce terpene maleic anhydride to corresponding alcohol, and the conversion rate of raw material could reach 84%.

Preparation and Characterization of Surface-Modified Nanocellulose Fibers for Water-Based Coating Application

2020 ◽  
Vol 845 ◽  
pp. 21-26
Author(s):  
Narunchara Phurahong ◽  
Nantana Jiratumnukul
Keyword(s):  
Citric Acid ◽  
Phthalic Anhydride ◽  
Succinic Anhydride ◽  
Molar Ratio ◽  
Coating Application ◽  
Molar Ratios ◽  
Reinforcement Material ◽  
Water Based ◽  
Surface Modified

Nanocellulose fibers (NCF) is a renewable biodegradable polymer in nature. It has extensively interest as a reinforcement material in nanocomposites due to its nanoscale advantages. However, the efficiency of NCF dispersion in polymer matrix has limitation due to its self-agglomeration.The objective of this research was to prepare surface-modified NCF using three different acids; succinic anhydride, phthalic anhydride and citric acid. The molar ratios of acid to anhydroglucose units in NCF used in this work were 6:1, 8:1 and 10:1. The effects of acid types and molar ratios toward physical properties were studied. The results showed that succinic anhydride-modified NCF provided the highest DS range from 0.46-0.86. Dispersion of succinic anhydride-modified NCF provided good stability in water for 30 days. The succinic anhydride-modified NCF of 1:6 molar ratio is suitable for emulsion coating application.

Synthesis and Characterization of some 2-Azetidinones Derived from 3-Nitro Phthalic Anhydride and Evaluation their Biological against Bacteria and Fungi

2020 ◽  
Vol 1002 ◽  
pp. 360-368
Author(s):  
Ahmood Kh. Jebur Al-Joubory ◽  
Rabiha Hameed Saleh ◽  
Omar Abdulrahman Mohammed
Keyword(s):  
Phthalic Anhydride ◽  
Acetyl Chloride ◽  
Bacterial Activity ◽  
Synthesis And Characterization ◽  
Inhibition Activity ◽  
Gram Negative ◽  
H Nmr ◽  
Bacteria And Fungi ◽  
High Inhibition

Reaction of the moiety 3-nitro phthalic anhydride with p- Phenylene diamine in (40 ml) acetic acid to give compound (p-amino phenyl)-3-nitro phthalimide (A1).Which that react with different aromatic aldehyde in ethanol absolute to give compounds hydrazone (A2-A5), then react this compounds (A2-A5) with chloro acetyl chloride in presence of TEA by using DMF as solvent to obtain 2-azetidinones (A6-A9).The compounds of all the newly synthesized structures were confirmed by and ,IR, 1H NMR as well as melting point. Some of these new structures showed antimicrobial activity (A7-A8) and anti-bacterial activity (A7-A8).Antibacterial activity of some prepared compounds against two types of bacteria: Staphylococcus aureus (Gram positive) and E.coli (Gram negative). Some the compounds showed high inhibition activity against bacteria and two fungi (Candida albicans) and (Candida tropicalis.).

scholarly journals Synthesis and Characterization of Some New Monemer and Polymers Containing Hetero Cyclic Rings With Study of Their Physical Properties.

2016 ◽  
Vol 13 (2) ◽  
pp. 172-180
Author(s):  
Baghdad Science Journal
Keyword(s):  
Acetic Acid ◽  
Schiff Base ◽  
Maleic Anhydride ◽  
Phthalic Anhydride ◽  
Sodium Azide ◽  
Heterocyclic Compounds ◽  
Synthesis And Characterization ◽  
X Ray ◽  
Ft Ir

Number of new polyester and polyamide are prepared as derivatives from 5,5`-(1,4-phenylene)-bis-(1,3,4-thiadiazole-2-amine) [C1], three series of heterocyclic compounds were synthesized.The first series includes the Schiff base [C2] prepared from the reaction between compound [C1] with p-hydroxy benzaldehyde in presence of acetic acid and absolute ethanol , then these derivatives have reaction with maleic anhydride , phthalic anhydride and sodium azide, respectively to obtain the compounds [C3-5] contaning (oxazepine and tetrazole) rings.The third series of compounds [C1-5] has transformed to their polymers [C6-15] by reaction with adipoyl chloride and glutroyl chloride , respectively. The reaction was followed by T.L.C and identified by FT-IR , 1H-NMR ,C.H.N analysis , softening point , viscosity, TGA , DSC and X-ray.

scholarly journals Grinding-Assisted Synthesis of Some Heterocyclic Compounds

2020 ◽  
Vol 32 (7) ◽  
pp. 1713-1718
Author(s):  
Jasim Ali Abdullah ◽  
Muwafaq Ayesh Rabeaa
Keyword(s):  
Schiff Base ◽  
Melting Point ◽  
Maleic Anhydride ◽  
1H Nmr ◽  
Phthalic Anhydride ◽  
13C Nmr ◽  
Sodium Azide ◽  
Heterocyclic Compounds ◽  
Succinic Anhydride ◽  
Benzaldehyde Derivatives

This article involves synthesis of some heterocyclic compounds from an amine derivative using ecofriendly approach (grinding). The first step involves synthesis of Schiff base from benzaldehyde derivatives (3-hydroxybenzaldehyde and 4-nitrobenzaldehyde) with 4-aminoantipyrine. These compounds were used as precursor for the synthesis of heterocyclic compounds and then synthesized tetrazole, oxazepine oxazepane derivatives from Schiff base with sodium azide, phthalic anhydride, maleic anhydride and succinic anhydride, respectively. The heterocyclic compounds were characterized by TLC, melting point, FTIR, 1H NMR, 13C NMR, GC-mass and HRMS analyses.

New Polymer Syntheses IV. Synthesis and Characterization of New Polyamides Containing Bis-Benzthiazolyl Sulphone Units in the Main Chain

1996 ◽  
Vol 8 (2) ◽  
pp. 307-314 ◽  
Author(s):  
Kamal I Aly ◽  
Maymona M Kandeel
Keyword(s):  
Room Temperature ◽  
Model Compound ◽  
Main Chain ◽  
H Nmr ◽  
Dsc Measurements ◽  
Elemental Analyses ◽  
Tga And Dsc ◽  
Thermal Stability Of ◽  
Solution Polycondensation

Bis(2-aminobenzthiazolyl) sulphone (BABS) was used as a new starting material for preparing polyamides. These polyamides were prepared by reacting BABS with adipoyl, sebacoyl, isophthaloyl and terephthaloyl dichlorides, and also with 4,4′-azodibenzoyl chloride or 3,3′-azodibenzoyl chloride, utilizing the solution polycondensation technique at low temperature. In addition, the model compound was synthesized by condensing the BABS with benzoyl chloride. Characterization of the monomer, model compound and the polyamides was accomplished by 1H NMR, IR and elemental analyses. The polyamides had reduced viscosities of 0.25–0.63 dI/g in DMF or DMSO at 25 °C. All the polymers dissolved readily at room temperature in polar aprotic solvents. The thermal stability of the polymers was evaluated by TGA and DSC measurements.

Preparation and characterization of polyethylene-g-maleic anhydride–styrene/montmorillonite nanocomposites

2006 ◽  
Vol 101 (2) ◽  
pp. 805-809 ◽  
Author(s):  
Zhengfa Zhou ◽  
Hongbo Zhai ◽  
Weibing Xu ◽  
Hanyang Guo ◽  
Changfeng Liu ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Montmorillonite Nanocomposites
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