Aromatic polyamides containing keto-benzocyclobutene pendants

Tan, Loon‐Seng; Venkatasubramanian, N.

doi:10.1002/(sici)1099-0518(199612)34:17<3539::aid-pola8>3.0.co;2-p

Cited by 9 publications

(2 citation statements)

References 27 publications

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“…Therefore, cross‐linking is usually used to improve the mechanical, thermal, and chemical resistance of organic polymers, although this strategy has scarcely been used for aramids due to economic and technical difficulties. For instance, the thermal cross‐linking of aromatic polyamides by means of thermal treatment of functionalized aramids (with arylene carboxylic acid and hydroxyl groups, benzocyclobutenes, enaminonitriles, or active aryl halides), and of aramids‐containing poly(meth)acrylic acid (PAA) as a cross‐linking agent, has been described . Following this approach, we propose the preparation of functional, cross‐linkable aromatic polyamides that can easily scaled up to current fiber production technologies (i.e., dry, wet, or dry‐jet wet spinning), to enhance the mechanical, thermal, and electrical isolation properties of the fibers.…”

Section: Introductionmentioning

confidence: 99%

“…Comparing the properties of aramids to those of other synthetic yarns, the advantages of the former are related to their high tenacity and modulus of elasticity, low creep, good fatigue and thermal and chemical resistance. The advantages of aramids over steel mainly rely on their low density, high energy absorption, thermal cross-linking of aromatic polyamides by means of thermal treatment of functionalized aramids (with arylene carboxylic acid and hydroxyl groups, [ 16 ] benzocyclobutenes, [ 17,18 ] enaminonitriles, [ 19 ] or active aryl halides), [ 20 ] and of aramids-containing poly(meth)acrylic acid (PAA) as a cross-linking agent, has been described. [ 21 ] Following this approach, we propose the preparation of functional, cross-linkable aromatic polyamides that can easily scaled up to current fi ber production technologies (i.e., dry, wet, or dry-jet wet spinning), to enhance the mechanical, thermal, and electrical isolation properties of the fi bers.…”

Section: Introductionmentioning

confidence: 99%

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Crosslinked Aromatic Polyamides: A Further Step in High‐Performance Materials

Trigo‐López

Barrio-Manso

Serna

et al. 2013

Macro Chemistry & Physics

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This work aims to improve the outstanding thermal and mechanical properties of commercialized wholly aromatic polyamide fibers (i.e., aramids), by crosslinking the materials. The introduction of a reactive azide group into the polymer structure leads to functional aramids. Crosslinking processes can be easily performed using an inexpensive thermal treatment after fiber spinning with current spin production facilities.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Crosslinked Aromatic Polyamides: A Further Step in High‐Performance Materials

Trigo‐López

Barrio-Manso

Serna

et al. 2013

Macro Chemistry & Physics

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Aromatic Polyamides

Trigo‐López

García

Ruiz

et al. 2018

Encyclopedia of Polymer Science and Technology

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This article presents the preparation and properties of aromatic polyamides as well as the fibers and films made from these polymers. Particular focus is placed on the polymers that have achieved commercial status, namely, poly( m ‐phenylene isophthalamide), poly( p ‐phenylene terephthalamide), and copoly( p ‐phenylene/3,4′‐diphenyl ether terephthalamide). The production processes of the corresponding monomers for these three polymers are described in detail, analyzing both laboratory and commercial‐scale processes for the preparation of the polymers in the form of fibers and films. A brief review of new developments in the synthesis and applications of functional aromatic polyamides is also given, analyzing new applications in which polyamides are being employed, such as electronics, sensors, and biomaterials. Finally, a brief analysis of the economic impact of the polyamide market is described, including also environmental aspects.

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New film-forming aromatic poly(amide-imide)s containing isoindoloquinazolinedione unit in the backbone. 2. Physical properties of the film cast from poly(biphenylphthalicdianhydride-oxydianiline-4,4?-diamino-3?-carbamoyl-benzanilide) [poly(BPDA-ODA-DACB)]

Kang¹,

Hong

Park

2000

J. Appl. Polym. Sci.

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New aromatic poly(amide‐imide) films containing isoindoloquinazolinedione unit in the backbone chain were directly obtained by thermal cyclization of the prepolymer of poly(amic acid‐carbonamide) type, i.e., poly(biphenylphthalic dianhydride‐oxydianiline‐4,4′‐diamino‐3′‐carbamoyl‐benzanilide) [poly(BPDA‐ODA‐DACB)]. The films, before heat treatment, exhibited the tensile strength of 30 ≈ 40 MPa and the tensile modulus of 1.3 ≈ 1.9 GPa. After heat treatment, the strength and modulus increased to 135 ≈ 150 MPa and 2.6 ≈ 2.7 GPa, respectively. The films remained transparent throughout the thermal treatment. The cyclized films were much more chemically resistant to alkali than the commercial products such as “Kapton” film and “P84” film, while thermal properties were comparable. The isoindoloquinazolinedione unit induced in the chain backbone on the heat treatment of the films was considered to be a major factor responsible for the superior physical properties of the films. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 118–123, 2000

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Aromatic polyamides containing keto-benzocyclobutene pendants

Cited by 9 publications

References 27 publications

Crosslinked Aromatic Polyamides: A Further Step in High‐Performance Materials

Crosslinked Aromatic Polyamides: A Further Step in High‐Performance Materials

Aromatic Polyamides

New film-forming aromatic poly(amide-imide)s containing isoindoloquinazolinedione unit in the backbone. 2. Physical properties of the film cast from poly(biphenylphthalicdianhydride-oxydianiline-4,4?-diamino-3?-carbamoyl-benzanilide) [poly(BPDA-ODA-DACB)]

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