Interplay between rheological and structural evolution of benzoxazine resins during polymerization

Huang, Rongzhi; Carson, Sidney O.; Silva, J.; Agag, Tarek; Ishida, Hatsuo; Maia, João M.

doi:10.1016/j.polymer.2013.01.039

Cited by 23 publications

(17 citation statements)

References 34 publications

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“…These results are in agreement with previous studies. 15,32,41,43 Both ATR-FTIR spectra of M1 and M2 did not show the characteristic absorption peak of the OH groups ( Figure S9), which is consistent with 1 H NMR results.…”

Section: Macromoleculessupporting

confidence: 82%

Synthesis and Characterization of Partially Fluorinated Polybenzoxazine Resins Utilizing Octafluorocyclopentene as a Versatile Building Block

Wu¹,

Yang²,

McCandless³

et al. 2015

Macromolecules

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Two new fluorinated diamine-based benzoxazines using octafluorocyclopentene (OFCP) as a building block have been developed. Monomers were synthesized via two distinct synthetic procedures utilizing the facile nucleophilic addition−elimination reaction of OFCP with phenols amenable to a multigram scale-up. The structure elucidation of both monomers was confirmed by 1 H, 19 F, and 13 C NMR, ATR-FTIR, and high-resolution mass spectrometry. Benzoxazine networks were prepared by a thermally mediated ring-opening polymerization. ATR-FTIR analysis was utilized to monitor the ring-opening reaction of the monomers. The resulting two cured resins exhibit the combined excellent properties of low dielectric constants (k = 3.2−2.6), excellent thermal stability, and high char yields which are suitable for many applications such as flame-resistant materials as well as aerospace and microelectronic industries.

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Section: Macromoleculessupporting

confidence: 82%

Synthesis and Characterization of Partially Fluorinated Polybenzoxazine Resins Utilizing Octafluorocyclopentene as a Versatile Building Block

Wu¹,

Yang²,

McCandless³

et al. 2015

Macromolecules

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“…The rheological analysis is able to provide basic insights about the processability of the resin . The viscosity of the PBPRs increased gradually with the extension of time at 60°C, whereas those of PR and BPRs increased rapidly (Fig.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of novel phenolic resins containing aryl-boron backbone and their utilization in polymeric composites with improved thermal and mechanical properties

Wang

Jing

Wang

et al. 2013

Polym. Adv. Technol.

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In the present study, a novel aryl‐boron‐containing phenolic resin named as PBPR has been synthesized from phenol and formaldehyde in the presence of phenylboronic acid. The chemical structure of the PBPR was confirmed by Fourier transform infrared, nuclear magnetic resonance and X‐ray photoelectron spectroscopy. The molecular weight, viscosity and curing behavior were examined to demonstrate that PBPRs have better processability than common boric acid‐modified phenolic resin. The thermal stability and fracture toughness of the cured PBPRs were greatly enhanced, where the char yield at 1000°C (nitrogen atmosphere) and the glass transition temperature reached 70.0% and 218°C, respectively. The excellent mechanical and ablative properties of the PBPR composites may have benefited from the good interfacial adhesion between the resin matrix and the reinforced fiber. The flexural strength and the linear ablative rate are 436.8 ± 5.2 MPa and 0.010 mm/sec, respectively. This study opens a new window for the preparation of high‐performance ablative composites by designing a resin matrix containing an aryl‐boron backbone. Copyright © 2013 John Wiley & Sons, Ltd.

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“…Kaolin (Cation Exchange Capacity: CEC = 3-15 meq/100 g) and sepiolite (CEC = 10-12 meq/100 g) were kindly supplied by LB Minerals and Sepiolsa, respectively. Sepiolite CEC is similar to those of kaolin, but the hydroxyl content of sepiolite represent 5% of its molecular weight (General formula: Mg 4 Si 6 O 15 (OH) 2 Á6H 2 O), while the hydroxyl content of kaolin represent 26% of its molecular weight (General formula: Al 2 Si 2 O 5 (OH) 4 ). Sepiolite was used to discuss the role of the interlayer cations onto the composites properties and to compare the effect of the AOH groups content onto the filler dispersion.…”

Section: Methodsmentioning

confidence: 93%

“…These properties have been attributed to the unique hydrogen bonding structure found in these materials, therefore being the focus of recent investigations [2][3][4][5][6]. Thanks to these interactions, polybenzoxazines meet logically development in supramolecular chemistry, molecular nanotechnology and biotechnology [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

H-bonding supramolecular interactions driving the dispersion of kaolin into benzoxazine: A tool for the reinforcement of polybenzoxazines thermal and thermo-mechanical properties

Ganfoud

Puchot

Fouquet

et al. 2015

Composites Science and Technology

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Interplay between rheological and structural evolution of benzoxazine resins during polymerization

Cited by 23 publications

References 34 publications

Synthesis and Characterization of Partially Fluorinated Polybenzoxazine Resins Utilizing Octafluorocyclopentene as a Versatile Building Block

Synthesis and Characterization of Partially Fluorinated Polybenzoxazine Resins Utilizing Octafluorocyclopentene as a Versatile Building Block

Synthesis and characterization of novel phenolic resins containing aryl-boron backbone and their utilization in polymeric composites with improved thermal and mechanical properties

H-bonding supramolecular interactions driving the dispersion of kaolin into benzoxazine: A tool for the reinforcement of polybenzoxazines thermal and thermo-mechanical properties

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