Preparation and properties of some cardopolyamides
01 Sep 1981-Journal of Polymer Science Part A (John Wiley & Sons, Inc.)-Vol. 19, Iss: 9, pp 2275-2285
About: This article is published in Journal of Polymer Science Part A.The article was published on 1981-09-01. It has received 13 citations till now.
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TL;DR: A series of fluorenyl cardo polyimides were prepared by polycondensation of these cardo diamines with 4,4′-oxydiphthalic anhydride (ODPA) as mentioned in this paper.
58 citations
TL;DR: A series of alternating polyamide-imides (PAIs) with fluorenyl cardo having inherent viscosities of 0.38-0.88 dL/g was synthesized by one-pot polycondensation of cardo diamines, trimellitic anhydride, and various aromatic diamines including p-phenylene diamine, m-phenylon diamine and 4,4'-oxydianiline as mentioned in this paper.
Abstract: A series of alternating polyamide–imides (PAIs) with fluorenyl cardo having inherent viscosities of 0.38–0.88 dL/g was synthesized by one-pot polycondensation of cardo diamines, trimellitic anhydride, and various aromatic diamines including p-phenylene diamine, m-phenylene diamine, 4,4'-oxydianiline, 3,4'-oxydianiline, 2,2-bis[4-(4-aminophenoxy)phenyl]propane, 2,2-bis[4-(3-amino phenoxy)phenyl]propane using triphenyl phosphite as condensing agents. Most of the polymers were readily soluble in a variety of organic solvents, such as N-methyl-2-pyrrolidin-one, N,N-dimethylacetamide (DMAc), N,N-dimethylformamide, dimethyl sulfoxide, pyridine, and tetrahydrofuran, etc. PAIs exhibited better solubility when alkyl substituents were incorporated. Moreover, the effects of the linkage of imide/amide on the properties of PAIs were also discussed. The glass-transition temperatures of these polymers were recorded between 235 and 448°C by DSC and 10% weight loss temperature of all polymers exceed 450°C in air. The films of the resulting PAIs could be cast from their DMAc solutions. These films had a tensile strength in the range of 43-111 MPa, and an elongation at break in the range of 1.5–7.1%. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
38 citations
TL;DR: In this paper, a diamine-based benzoxazine monomer containing aryl ether and bulky fluorene groups (BEF-p) was prepared from the reaction of 9,9-bis-[4-(p-aminophenoxy)-phenyl]fluorene with paraformaldehyde and phenol.
35 citations
TL;DR: In this paper, a diamine-based benzoxazine monomer containing ester and bulky fluorene groups (BABPF-p) was successfully synthesized by the reaction of 9,9-bis-[4-(4-aminobenzoyloxy)phenyl]fluorene with paraformaldehyde and phenol.
34 citations
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...Therefore, the development of these polymers has attracted extensive research interests during the past few years [28–34]....
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TL;DR: In this paper, a novel fluorenyl cardo chain-extended bismaleimides (FCCEBMIs) were synthesized by reacting maleic anhydride with FD diamine and different dianhydrides.
Abstract: Novel fluorenyl cardo chain-extended bismaleimides (FCCEBMIs) were synthesized by reacting maleic anhydride with fluorenyl cardo diamine and different dianhydrides. FCCEBMIs were characterized by FT-IR spectra (FT-IR), 1H NMR, and elemental analysis. All FCCEBMI monomers were readily soluble in a variety of organic solvents, such as N-methyl-2-pyrrolidinone, N,N-dimethyl acetamide, chloroform (CHCl3), methylene chloride (CH2Cl2), dimethyl sulfoxide, and tetrahydrofuran when compared with 9,9-bis(4-maleimidophenyl) fluorene. Curing process was investigated by differential scanning calorimetry. Thermal properties of the cured FCCEBMIs were characterized by thermogravimetry analysis, the cured products are stable up to 430°C. The results show that the FCCEBMIs with imide structure improve significantly the solubility of bismaleimide (BMI) in organic solvents without sacrificing thermal properties of cured BMIs. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
32 citations