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OPTICALLY ACTIVE AND FLAME-RETARDANT POLY(AMIDE-IMIDE)S BASED ON PHOSPHINE OXIDE MOIETY AND N,N′-(PYROMELLITOYL)BIS-L-AMINO ACID IN THE MAIN CHAIN:SYNTHESIS AND CHARACTERIZATION

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Chinese Journal of Polymer Science 2010年第4期28卷 517-525页

作者： Khalil Faghihi mohsen hajibeygi Organic Polymer Chemistry Research Laboratory Department of ChemistryFaculty of ScienceArak UniversityArak 38156Iran

Six new optically active and flame-retardant poly（amide-imide）s PAls 5a-5f containing phosphine oxide moiety as a flame-retardant unit in the main chain were synthesized from direct polycondensation reaction of six chiral N,N＇-（pyromellitoyl）-bis-L-amino acid 3a-3f with bis（3-aminophenyl）phenyl phosphine oxide 4 in a medium consisting of N-methyl-2-pyrrolidone （NMP）, triphenyl phosphite （TPP）, calcium chloride （CaCl2） and pyridine. The polymerization reactions produced a series of optically active poly（amide-imide）s with good yield and good inherent viscosity of 0.34-0.70 dLg^-1. The resulted polymers were fully characterized by means of FTIR and ^1H-NMR spectroscopy, gel permeation chromatography （GPC）, elemental analyses, inherent viscosity and solubility tests. Thermal properties and flameretardant behavior of the PAIs 5a-5f were investigated using thermal gravimetric analysis （TGA and DTG） and limiting oxygen index （LOI）. Data obtained by thermal analysis （TGA and DTG） revealed that these polymers showed good thermal stability. Furthermore, high char yield in TGA and good LOI values indicated that the resulting polymers were capable of exhibiting good flame retardant properties. N,N＇-（pyromellitoyl）-bis-L-amino acids 3a-3f were prepared in quantitative yields by the condensation reaction of pyromellitic dianhydride （1,2,4,5-benzenetetracarboxylicacid-1,2,4,5-dianhydride） 1 with L-alanine 2a, L-valine 2b, L-leucine 2c, L-isoleucine 2d, L-phenyl alanine 2e and L-2-aminobutyric acid 2f in acetic acid solution.

关键词： Optically active Flame-retardant polymers Poly(amide-imide)s Limiting oxygen index

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Organosoluble Aliphatic-Aromatic Poly(ether-amide)s Based on Pyridine Moiety in the Main Chain: Synthesis, Characterization and Thermal Studies

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Chinese Journal of Polymer Science 2014年第6期32卷 758-767页

作者： mohsen hajibeygi Meisam Shabanian Young Researchers Club Varamin Pishva Branch Islamic Azad University Department of Chemistry Farahan Branch Islamic Azad University

A series organosoluble and heterocyclic poly（ether-amide）s （PEA）s were synthesized from a new diamine containing pyridine moiety and four aliphatic-aromatic dicarboxylic acids by direct polycondensation reactions. Dicarboxilic acids 4a-4d containing ether groups were synthesized in two step reactions. At first, dialdehydes 3a-3d were synthesized from four dibromo alkanes la-ld and 4-hydroxybenzaldehyde 2, then dicarboxilic acids 4a-4d were synthesized from dialdehydes 3a-3d and malonic acid in a solvent free reaction. On the other hand, the new diamine 8 containing pyridine ring was synthesized in two step reactions. The structures of synthesized monomers and polymers were proven by FTIR, NMR spectroscopy and elemental analysis. Also all of the above polymers were fully characterized by inherent viscosity, solubility tests, gel permeation chromatography （GPC）, differential scanning calorimetry （DSC） and thermogravimetric analysis （TGA）. The resulted PEAs have shown good inherent viscosities, solubility and thermal properties.

关键词： Poly(ether-amide) Organosoluble Aliphatic-aromatic Polycondensation Malonic acid.

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SYNTHESIS AND CHARACTERIZATION OF ORGANO-SOLUBLE POLY(AMIDE-IMIDE)S BASED ON 1,2-BIS[4-(TRIMELLITIMIDO)PHENOXY]ETHANE AND AROMATIC DIAMINES

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Chinese Journal of Polymer Science 2010年第6期28卷 941-949页

作者： Khalil Faghihi Mehdi Nourbakhsh mohsen hajibeygi Organic Polymer Chemistry Research Laboratory Department of ChemistryFaculty of Science Arak University

New organo-soluble poly（amide-imide）s（PAIs） 8a-8f were prepared from newly synthesized 1,2-bis[4,4＇-（trimellitimido） phenoxy]ethane 6 via direct polycondensation with various aromatic *** diacid 6 was synthesized by the condensation reaction of 12-bis[4-atninophenoxy]ethane 4 with trimellitic anhydride 5 in acetic *** polymers were obtained in quantitative high yields with inherent viscosities of 0.48-0.61 dL/*** of these polymers were highly soluble in organic solvents such as,N-methyl-2-pyrrolidone（NMP）,dimethylformamide（DMF）,N,N＇-dimethylacetamide （DMAc） and dimethylsulfoxide（DMSO） at room temperature and were fully characterized by means of NMR spectroscopy, FTIR spectroscopy,elemental analyses,inherent viscosity,solubility test,specific rotation,differential scanning calorimetry （DSC） and thermogravimetric analysis（TGA）.

关键词： Poly(amide-imide) Polycondensation Organo-soluble

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Synthesis and characterization of new optically active and organosoluble poly(ester-imide)s based on bicyclo[2,2,2]oct-7-ene-2,3,5,6-tetracarboxylic diimide by direct polycondensation

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Science China Chemistry 2010年第4期53卷 898-904页

作者： FAGHIHI Khalil SHABANIAN Meisam hajibeygi mohsen Organic Polymer Chemistry Research Laboratory Department of ChemistryFaculty of ScienceArak University

New optically active poly(ester-imide)s PEIs were prepared from newly synthesized N,N′-(bicyclo[2,2,2]oct-7-ene-2,3,5,6-tetracarboxylic)-bis-L-isoleucine diacid 4 via direct polycondensation with various aromatic diols in a system of tosyl chloride (TsCl), pyridine (Py), and N,N-dimethylformamide (DMF). The reactions with bicyclo TsCl were significantly promoted by controlling alcoholysis with diols, in the presence of catalytic amounts of DMF, to give a series of optically active PEIs, with good yield and moderate inherent viscosity ranging from 0.44 to 0.66 dL/g. The diacid 4 was synthesized by the condensation reaction of [2,2,2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride 1 with L-isoleucine 2 in acetic acid. All of these polymers were highly organosoluble in solvents such as N,N-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), and N-methyl-2-pyrrolidone (NMP) at room temperature. They were fully characterized by means of NMR spectroscopy, FTIR spectroscopy, gel permeation chromatography (GPC), elemental analyses, inherent viscosity, solubility test, and specific rotation, and thermal properties of the poly(ester-imide)s were investigated using TGA/DTG.

关键词： poly(ester-imide)s direct polycondensation optically active polymers L-isoleucine

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Polyimide-silver nanocomposite containing phosphine oxide moieties in the main chain:Synthesis and properties

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Chinese Chemical Letters 2010年第11期21卷 1387-1390页

作者： Khalil Faghihi mohsen hajibeygi Meisam Shabanian Organic Polymer Research Laboratory Department of ChemistryFaculty of ScienceArak University

New flame-retardant polyimide-silver nanocomposite containing phosphine oxide moiety in the main chain was synthesized by a convenient ultraviolet irradiation technique.A precursor such as AgNO_3 was used as the source of the silver *** 6 as a source of polymer was synthesized by polycondensation reaction of bis（3-aminophenyl） phenyl phosphine oxide 4 with pyromellitic anhydride 5 in the presence of iso-quinoline as base and in m-cresol *** resulting composite film was characterized by FTIR spectroscopy,X-ray diffraction（XRD）,transmission electron microscopy（TEM）,thermogravimetry（TGA） and differential scanning calorimetry（DSC）.The average size of the nanometer Ag particles is about 10 *** temperature of 5 and 10%weight loss and also the char yield at 600℃of polyimide-silver nanocomposite 6a were higher than the pure PI 6.

关键词： Flame-retardant Polyimide-silver nanocomposite Phosphine oxide moiety

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Thermally Stable and Organo-soluble Polyamides Containing Triazine Rings and Ether Linkages in the Main Chain: Synthesis and Characterization

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Chinese Journal of Polymer Science 2015年第1期33卷 109-117页

作者： mohsen hajibeygi Khalil Faghihi Majid Khodaei-Tehrani Zeinab Mirzakhanian Faculty of Chemistry Kharazmi University 15719-14911 Tehran Iran Department of Chemistry Faculty of Science Arak University Arak 38156-8-8349 Iran Department of Chemistry Arak Branch Islamic Azad UniversityArak Iran

In order to synthesize new polyamide（PA） 5 and copolyamides（Co PA） 7a-7d, a new-type of dicarboxylic acid containing triazine ring was successfully synthesized from 2,4-dichloro-6-methoxy-s-triazine 1 and 4-aminobenzoic acid. New polyamide 5 containing triazine moiety was prepared from 4,4＇-（6-methoxy-1,3,5-triazine-2,4-diyl）bis（azanediyl）dibenzoic acid 3 and 4,4′-diaminodiphenylether by direct polycondensation reaction. Then new series thermally stable copolyamides 7a-7d with high solubility in common organic solvents were synthesized from the direct polycondensation reaction of diacid 3 as a first monomer, aliphatic-aromatic diacids 6a-6d as second diacids and 4,4′-diaminodiphenylether. All of the above polymers were fully characterized by 1H-NMR and FTIR spectroscopy, elemental analysis（CHN）, inherent viscosity, solubility tests, gel permeation chromatography（GPC）, differential scanning calorimetry（DSC） and thermogravimetric analysis（TGA）. The resulted Co PAs 7a-7d have shown good inherent viscosities, solubility and thermal properties.

关键词： Polyamide Thermally stable Organo-soluble Polycondensation Triazine.

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碳纳米管/聚酰胺纳米复合材料的制备及其阻燃和热性能(英文)

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新型炭材料 2015年第5期30卷 397-403页

作者： Meisam Shabanian mohsen hajibeygi Mehdi Roohani Faculty of Chemistry and Petrochemical Engineering Standard Research Institute (SRI) Faculty of Chemistry Kharazmi University

首先通过壬二酸和双(对-羧苯基)苯基氧化膦直接缩聚反应得到半芳香聚酰胺(PA),采用溶液共混方法,以多壁碳纳米管(CNTs)增强PA得到新型纳米复合材料。通过TG-DSC和微尺度燃烧量热法探讨CNTs对复合材料的热性能和可燃性能的影响。当CNT添... 详细信息

首先通过壬二酸和双(对-羧苯基)苯基氧化膦直接缩聚反应得到半芳香聚酰胺(PA),采用溶液共混方法,以多壁碳纳米管(CNTs)增强PA得到新型纳米复合材料。通过TG-DSC和微尺度燃烧量热法探讨CNTs对复合材料的热性能和可燃性能的影响。当CNT添加量为5%时复合材料的失重率比纯PA提高5%,热分解温度提高70℃。与纯PA相比,复合材料的热释放速率降低,这表明CNTs能提高PA的阻燃性。

关键词：多壁碳纳米管纳米复合材料聚酰胺阻燃

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