• Polybenzoxazines, also called benzoxazine resins, are a class of polymers that are produced from the ring-opening polymerization of 3-phenyl-2,4-dihydro-1,3-benzoxazine monomers and its chemical derivatives. (wikipedia.org)
  • 3,4-dihydro-3-phenyl-2H-1,3-benzoxazines derived from phenol-, resorcinol-, and phloroglucinol give monomers with one, two, and three oxazine units at a single benzene ring, respectively. (mdpi.com)
  • Polybenzoxazines, also called benzoxazine resins, are cured polymerization products derived from benzoxazine monomers. (wikipedia.org)
  • Benzoxazines can be homopolymerized to yield rigid materials, or can be copolymerized with other monomers to tune properties. (wikipedia.org)
  • The result of heating up benzoxazine monomers is a high molecular weight thermoset polymer matrix. (wikipedia.org)
  • The development of polybenzoxazines has always been linked to petro-based feedstocks, but for the last 5 years, the number of studies related to bio-based benzoxazines is exploding as a consequence of the versatility of the design of the chemical structure of their monomers. (intechopen.com)
  • Benzoxazine (Bz) monomers are subjected to cationic ring-opening polymerization (ROP), activated by a thermal treatment in the range of 160-250°C. In addition, Bz synthesis promotes the use of naturally occurring phenolic compounds instead of petroleum-based ones to develop high-performance materials from renewable resources and to fit to REACH restrictions. (intechopen.com)
  • In this chapter, the synthesis and the properties of di-functional benzoxazine monomers prepared from naturally occurring phenolic compounds are reviewed. (intechopen.com)
  • Aside from the synthesis and characterization of such multifunctional benzoxazines, reactivity and polymerization behavior is studied in dependence of the oxazine functionality. (mdpi.com)
  • This paper describes a facile one-pot synthesis of a poly(benzoxazine imide), NDOPoda Bz, through the reaction of a difunctional naphthalene dianhydride ortho -phenol (ND- ortho -phenol), paraformaldehyde, and 4,4′-oxydianiline in 1,4-dioxane, without the need for either the preparation of an amino-functionalized benzoxazine or subsequent thermal treatment. (rsc.org)
  • Benzoxazine is used in polymers, resins, and cross-linking agents due to its favorable thermal and chemical resistance, electrical properties, and design flexibility. (sigmaaldrich.com)
  • The last part of the chapter is dedicated to the use of bio-phenols to functionalize polymers and to provide benzoxazine functional groups. (intechopen.com)
  • Benzoxazines are products of condensation between an amine, a phenol and formaldehyde, used to produce thermoset resins or thermosetting polymer. (wikipedia.org)
  • Advanced and Emerging Polybenzoxazine Science and Technology introduces advanced topics of benzoxazine resins and polybenzoxazines as presented through the collaboration of leading experts in the benzoxazine community, representing the authoritative introduction to the subjects. (researchandmarkets.com)
  • Benzoxazines are bicyclic heterocyclic compounds containing one oxygen and one nitrogen atom in a doubly unsaturated six-member ring, specifically a 1,3-oxazine ring, fused with a benzene ring. (wikipedia.org)
  • Benzoxazines are a group of isomeric bicyclic heterocyclic chemical compounds that consist of a benzene ring fused to an oxazine ring. (wikipedia.org)
  • Benzoxazine and benzoxazinone based compounds ( fig. 1 ) forms an important class of benzfuzed heterocyles with wide spectrum of biological activities and are in the development phase as potential new drugs. (ijpsonline.com)
  • The present invention relates to a curable composition, comprising specific meta-substituted aromatic compounds and at least one benzoxazine compound. (patentsencyclopedia.com)
  • In particular, the invention relates to the use of said meta-substituted aromatic compounds as curatives/catalysts for benzoxazine-containing compositions. (patentsencyclopedia.com)
  • 7. The curable composition of claim 1, wherein the benzoxazine compound is selected from the group consisting of N-alkyl and/or N-alkenyl benzoxazine compounds. (patentsencyclopedia.com)
  • b) subjecting the polymerizable composition to conditions appropriate to polymerize the polymerizable composition, wherein the polymerizable composition comprises at least one benzoxazine compound, preferably selected from the group consisting of N-alkyl and N-alkenyl benzoxazine compounds. (patentsencyclopedia.com)
  • 16. Use of at least one meta-substituted aromatic compound a) as defined in claim 1 as a curative for polymerizable compositions, comprising at least one benzoxazine compound, preferably selected from the group consisting of N-alkyl and/or N-alkenyl benzoxazine compounds. (patentsencyclopedia.com)
  • A novel hybrid network composed of benzoxazines (BZ) and novolac epoxy resin (F-51) was prepared successfully. (hindawi.com)
  • Recently, many authors have investigated the copolymerization of benzoxazine resin with epoxy resin to increase the cross-linking density and glass-transition temperature and through this have gained plentiful and substantial achievements [ 8 , 20 - 22 ]. (hindawi.com)
  • 23 ]. However, the curing kinetic of benzoxazine-novolac epoxy resin hybrid networks by isothermal differential scanning calorimetry is scarce. (hindawi.com)
  • A novel benzoxazine (BOZ)/epoxy resin (ER) blend with multiphase structure was successfully prepared under the catalysis of imidazole (MZ) via reaction-induced phase separation. (rsc.org)
  • The curing kinetic of benzoxazine-epoxy hybrid networks by nonisothermal differential scanning calorimetry was noted by Jubsilp et al. (hindawi.com)
  • To better understand the curing kinetics of BZCN, isothermal differential scanning calorimetry measurements were used to determine the kinetic parameters and the kinetic models of the curing processes of benzoxazine monomer with cyano functionality. (scientific.net)
  • The effect of graphene oxide on the ring-opening polymerization of benzoxazine was also evaluated using differential scanning calorimetry (DSC). (aiche.org)
  • W. J. Chen and X. B. Liu, "Curing Kinetics of Cyano Functionalized Benzoxazine", Advanced Materials Research, Vols. (scientific.net)
  • There are several benzoxazine derivatives depending on the position of the oxygen and nitrogen in the ring. (sigmaaldrich.com)
  • Benzoxazine derivatives of phytophenols show anti-plasmodial activity via sodium homeostasis disruption. (nih.gov)
  • This is supported by the fact that benzoxazine chemistry has very low moisture absorption characteristics. (netcomposites.com)
  • Broad topics covered include the recent development and improved understanding of the subjects, including low temperature cure, aerogels and carbon aerogels, smart chemistry in fire retarding materials and coatings, metal containing benzoxazines, rational design of advanced properties, and materials from natural renew. (researchandmarkets.com)
  • 1,3-Benzoxazines can be synthesized by the Mannich reaction using a phenol, an amine, and formaldehyde. (wikipedia.org)
  • Benzoxazines (BZ) can be prepared by the Mannich-like condensation of different types of phenol, formaldehyde, and an amine, by employing either solution or solventless methods, so the molecular structure of BZ offers enormous design flexibility. (hindawi.com)
  • Aromatic diamine-phenol-based benzoxazine (BOZ) resin based on 4,4′-diaminodiphenyl methane (DDM), phenol and paraformaldehyde was synthesized and characterized as previous reports. (rsc.org)
  • Benzoxazines can be prepared by a one-pot process by heating an aromatic amine, a phenol and formaldehyde. (wikipedia.org)
  • Benzoxazine is composed of an oxazine ring, a heterocyclic aromatic six-membered ring with oxygen and nitrogen, attached to a benzene ring. (sigmaaldrich.com)
  • Koschek, K. Multifunctional Benzoxazines Feature Low Polymerization Temperature and Diverse Polymer Structures. (mdpi.com)
  • A multifunctional benzoxazine monomer (BZCN) was synthesized, which has several outstanding properties, such as high thermal stability and high glass transition. (scientific.net)
  • Additional tables on key NMR and FTIR frequencies unique to benzoxazine, heat of polymerization, Tg, and char yield will greatly aid in the choice of proper benzoxazine for a specific application. (chemtec.org)
  • Abstract In this article, a new synthetic approach for the modification of partial glycerides (PG) obtained from sunflower oil with thermally curable benzoxazine units and its potential use as a coating material are described. (thefreedictionary.com)
  • The chemical structures of the benzoxazine precursors were confirmed by nuclear magnetic resonance spectroscopy ( 1 H-NMR) and (FT-IR).The morphological, surface, and thermal properties of the aerogels obtained were examined and compared with the neat polybenzoxazine aerogels. (aiche.org)
  • Benzoxazine film formation by thermally induced destabilization of benzoxazine nanodroplets. (mpg.de)
  • No volatile release during cure Viscosities as low as 1000 cP at processing temperatures Near zero shrinkage Room temperature storage stability Gel times of as short as 17 minutes at 155 °C Good hydrophobicity Gel temperature Tg at 140 - 250 °C or higher Excellent electrical properties (low dielectric constant and dissipation factors) Good chemical resistance Thermosetting polymer Thermoset polymer matrix Plastic "Huntsman benzoxazine brochure, "High-Performance Materials for Extreme Environments"" (PDF). (wikipedia.org)
  • Because of the wide availability and low-cost of starting materials (amines, phenols and formaldehyde), as well as ease of preparation (one-pot reaction) diverse benzoxazines are available. (wikipedia.org)
  • Comparing the polymerization processes and resulting structures, the trifunctional benzoxazine derivative enter new polymerization pathways, which include methylene linkages bridging aniline units, as well as the formation of carbonyl-derived structures. (mdpi.com)
  • Currently supervising a PhD student (Maryam Sairi, sponsored by the Malaysian Government) on predicting the char yield of Benzoxazines by QSPR. (surrey.ac.uk)
  • Benzoxazine precursors were synthesized using 4-hydroxybenzaldehyde as phenolic component, paraformaldehyde, and two different functional polyetheramines. (aiche.org)
  • 19. The photochromic article of claim 18 wherein the organic photochromic substance is selected from the group consisting of spiro(indoline)naphthoxazines, spiro(indoline)benzoxazines, benzopyrans, naphthopyrans, chromenes, organo-metal dithizonates, fulgides and fulgimides and mixtures of such organic photochromic substances. (google.com)
  • Due to their prominent processability and excellent thermal and mechanical properties, epoxy (ER) modified benzoxazine (BOZ) blending systems have attracted more and more attention in a wide range of application areas, including adhesives, filler-reinforced composite materials, and coatings for electronic circuits. (rsc.org)
  • This new poly(benzoxazine imide) underwent cross-linking polymerization to form a highly cross-linked poly(benzoxazine imide), which, with additional thermal treatment, was converted to highly cross-linked polybenzoxazoles. (rsc.org)
  • In addition, this approach decreased the temperature for ring opening of the benzoxazine, accelerated the rate of benzoxazole ring formation of NDOPda Bz at a lower temperature, and improved the thermal stability of the formed polybenzoxazoles. (rsc.org)
  • Curing of benzoxazines takes place by thermal ring-opening polymerisation with or without catalyst. (wikipedia.org)
  • Low-Dissipation Thermosets Derived from Oligo(2,6-Dimethyl Phenylene Oxide)-Containing Benzoxazines. (nih.gov)
  • mol -1 and the total order of reaction is 1.84, which is quite different from that of normal benzoxazine. (scientific.net)
  • Benzoxazines" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (umassmed.edu)
  • Monomer reactivities are directly related to the number of oxazine functionalities present at the benzene ring yielding the lowest polymerization temperature for the trifunctional phloroglucinol-based benzoxazine. (mdpi.com)
  • Numerous research focus on the different curing temperature, and polymer properties, such as cross-linking, from benzoxazines derived from substituted phenols. (wikipedia.org)
  • Benzoxazine rings form the central chemical structure of a number of pharmaceutical drugs including, for example, apararenone, elbasvir, and etifoxine. (wikipedia.org)
  • The peak for NCH 2 and OCH 2 groups of oxazine ring was observed from δ 3.87-4.6 and δ 4.95-5.51 ppm, respectively confirming the formation of benzoxazine ring. (ijpsonline.com)