Thermoplastic-thermosetting merged polyimides via furan-maleimide Diels–Alder polymerization

Patel, Yogesh; Patel, Hasmukh S.

doi:10.1016/j.arabjc.2013.04.010

Cited by 13 publications

(13 citation statements)

References 22 publications

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“…It was also observed that heating of 2a-h in THF-Acetone (50:50 v/v) at 70°C does not include the addition polymerization of 2a-h. This has been shown to be only possible either at elevated temperature or in the presence of an initiator [6][7][8].…”

Section: Resultsmentioning

confidence: 97%

“…Hence, the DA reaction of PFu resin with bis(maleimides) may alter the properties (especially in view of processing) of poly-imides up to some extent. One of the authors [HSP] already explored such field based on furan resins and furan derivatives [25,26]. So in extension of this work the present paper describes the study of cross linked polyimide containing phenolic residue as shown in scheme.…”

Section: Introductionmentioning

confidence: 97%

“…More particularly bismalemides afford polyimides via Diels-Alder (DA) reaction with bisfuran derivatives. Such type of polyimides can be easily processable which is established by one of present authors (HSP) [5][6][7][8][9][10]. Though furfuryl alcohol and furfural [11] are renewable agricultural products and form resins easily.…”

Section: Introductionmentioning

confidence: 99%

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Cross-linked polyimides containing phenolic residue

Patel

2016

Int J Plast Technol

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Cross-linked polyimides containing phenolic residue were prepared by Diels-Alder (DA) reaction of Phenol-furfural resin with various bis(maleimides), in presence of tetrahydro-furan-acetone (50:50 v/v) mixture solvent and without solvent. The so-called DA adduct tetrahydrophthalimide intermediates obtained were aromatized in the presence of acetic anhydride. The resultant cross-linked polyimides were characterized by elemental analyses, IR spectral studies and thermogravimetry. The results show that produced polyimides exhibit good thermal stability. The glass reinforcement of produced cross-linked polyimides system affords the laminates with good mechanical properties.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

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Cross-linked polyimides containing phenolic residue

Patel

2016

Int J Plast Technol

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“…The peaks of the curves shift to the right, demonstrating the increasing tempeartures at which DA and rDA reaction took place with the thermal cycles. This tendency might be related to the aromatization of the DA adduct or homopolymeryzation of the maleimides [52], both producing irreversible cross-links [48,[58][59][60]. These networks reduced the mobility of the materials, and thus restraining the DA and rDA reactions to occur.…”

Section: Synthesis and Characterization Of Thermally Reversible Networkmentioning

confidence: 99%

“…The insoluble portion of the samples increased with the number of thermal cycles (Figure 18). These insoluble materials are cross-linked polymers which might be the products of the DA adduct aromatization or maleimide homopolymerization [48,[58][59][60].…”

Section: Synthesis and Characterization Of Thermally Reversible Networkmentioning

confidence: 99%

Thermally Reversible Polymeric Networks from Vegetable Oils

et al. 2020

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Low cross-link density thermally reversible networks were successfully synthesized from jatropha and sunflower oils. The oils were epoxidized and subsequently reacted with furfurylamine to attach furan groups onto the triglycerides, preferably at the epoxide sites rather than at the ester ones. Under the same reaction conditions, the modified jatropha oil retained the triglyceride structure more efficiently than its sunflower-based counterpart, i.e., the ester aminolysis reaction was less relevant for the jatropha oil. These furan-modified oils were then reacted with mixtures of aliphatic and aromatic bismaleimides, viz. 1,12-bismaleimido dodecane and 1,1′-(methylenedi-4,1-phenylene)bismaleimide, resulting in a series of polymers with Tg ranging between 3.6 and 19.8 °C. Changes in the chemical structure and mechanical properties during recurrent thermal cycles suggested that the Diels–Alder and retro-Diels–Alder reactions occurred. However, the reversibility was reduced over the thermal cycles due to several possible causes. There are indications that the maleimide groups were homopolymerized and the Diels–Alder adducts were aromatized, leading to irreversibly cross-linked polymers. Two of the polymers were successfully applied as adhesives without modifications. This result demonstrates one of the potential applications of these polymers.

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Thermally stable Diels–Alder polymer using an azodicarbonyl compound as the dienophile

Sakurai

Kihara

2019

Polymer

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Thermoplastic-thermosetting merged polyimides via furan-maleimide Diels–Alder polymerization

Cited by 13 publications

References 22 publications

Cross-linked polyimides containing phenolic residue

Cross-linked polyimides containing phenolic residue

Thermally Reversible Polymeric Networks from Vegetable Oils

Thermally stable Diels–Alder polymer using an azodicarbonyl compound as the dienophile

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