Synthesis and characterization of heat resistant, pyridine-based polyimides with preformed ether and ester groups

Mehdipour‐Ataei, Shahram; Maleki-Moghaddam, R.; Nami, Majid

doi:10.1016/j.eurpolymj.2004.11.018

Cited by 37 publications

(10 citation statements)

References 16 publications

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“…Pyridine is a heteroaromatic molecule with polarizability and rigidity. New kinds of dianhydride, diamine, or other monomers within pyridine unit were designed and synthesized, and the novel linear polymers containing pyridine with good thermostability and processability were obtained as well . Pyridine ring would offer contributions for the thermal stability, chemical stability, retention of mechanical property of the resulting polymer at elevated temperature, because of the rigidity based on symmetry and aromaticity of pyridine.…”

Section: Introductionmentioning

confidence: 99%

Novel propargylether‐terminated monomers containing pyridine and phenyl pendent group: Synthesis, cure, and properties

Yang

Zhou

2014

J of Applied Polymer Sci

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Two novel propargylether-terminated resins containing pyridine and bulky phenyl pendent group were prepared from propargyl bromide and different diphenols, and highly thermal stable polymers were obtained by the thermal cure of the monomers. The chemical structures of these novel monomers were well confirmed by FTIR, 1 H-NMR and elemental analysis. Curing and thermal behavior of the resins were investigated using differential scanning calorimetry (DSC) and dynamic thermogravimetry in argon atmosphere. DSC curves of these two monomers showed a single endothermic peak corresponding to the conformation of chromene ring and homopolymerization of the chromene ring. The temperature at 5% weight loss (T d5 ) was higher than 440 C under argon and the highest glass transition temperature (T g ) reached 362 C. The rheological behavior and solubility of the monomer were also investigated. The monomers showed excellent flow-ability, broad processing window, and great solubility. These results showed that the two resins could be ideal candidates for high-temperature resistant resins. V C 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40469.

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Section: Introductionmentioning

confidence: 99%

Novel propargylether‐terminated monomers containing pyridine and phenyl pendent group: Synthesis, cure, and properties

Yang

Zhou

2014

J of Applied Polymer Sci

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“…They are interesting explosives from the point of view of thermal stability [13]. HNAB is of interest because of its melting point and relative insensitivity compared with pentaerythritol tetranitrate (PETN) and HNS [14]. One of the scanty reported [15] method of obtaining HNAB involves the treatment of picryl chloride with hydrazine, to obtain hexanitrohydrazobenzene.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and evaluation of 1,2-bis(2,4,6-trinitrophenyl) hydrazine: A key precursor for the synthesis of high performance energetic materials

Badgujar¹,

Talawar²,

Harlapur³

et al. 2009

Journal of Hazardous Materials

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“…Various attempts in this field have been achieved by our group and other researchers. [18][19][20][21][22][23][24][25][26][27][28] In this work we report the synthesis of three aromatic diamines (4BAP, 3BAP, and BAN) and preparation of polyimide nanofoams therefrom.…”

Section: Resultsmentioning

confidence: 99%

Structure–property relationships of low dielectric constant, nanoporous, thermally stable polyimides via grafting of poly(propylene glycol) oligomers

Mehdipour‐Ataei

Saidi

2008

Polymers for Advanced Techs

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Synthesis of high temperature polyimide foams with pore sizes in the nanometer range was developed. Foams were prepared by casting graft copolymers comprising a thermally stable block as the matrix and a thermally labile material as the dispersed phase. The copolyimides as the matrix material were prepared via polycondensation reactions of pyromellitic dianhydride with three new diamines (4BAP, 3BAP, and BAN) through the poly(amic acid) precursors. Functionalized poly(propylene glycol) (PPGBr-1000 and PPGBr-2500) as the labile oligomer was prepared via reaction of poly(propylene glycol) monobutyl ether with 2-bromoacetyl bromide. Graft copolymers were prepared by the reaction of the poly(amic acid)s with these thermally labile constituents. Upon thermal treatment the labile blocks were subsequently removed leaving pores with the size and shape of the original copolymer morphology. The polyimides and foamed polyimides were characterized by some conventional methods including FTIR, H-NMR, DSC, TGA, SEM, TEM, and dielectric constant. The average pore size of the polyimide nanofoams was in the range of 5-20 nm. The structure-property relationships of the prepared nanofoams were investigated based on the diamine structures and also molecular weights of labile groups.Structure-property relationships of nanoporous polyimides 891 Scheme 2. Structure of PPG-Br.Scheme 3. Synthesis of PAAE-g-PPG.

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Synthesis and characterization of heat resistant, pyridine-based polyimides with preformed ether and ester groups

Cited by 37 publications

References 16 publications

Novel propargylether‐terminated monomers containing pyridine and phenyl pendent group: Synthesis, cure, and properties

Novel propargylether‐terminated monomers containing pyridine and phenyl pendent group: Synthesis, cure, and properties

Synthesis, characterization and evaluation of 1,2-bis(2,4,6-trinitrophenyl) hydrazine: A key precursor for the synthesis of high performance energetic materials

Structure–property relationships of low dielectric constant, nanoporous, thermally stable polyimides via grafting of poly(propylene glycol) oligomers

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