A5082914999- Synthesis and properties of polymers
- Epoxy Resin Curing Processes
- Injection Molding Process and Properties
- Polymer crystallization and properties
- Polymer Nanocomposites and Properties
- Silicone and Siloxane Chemistry
- Liquid Crystal Research Advancements
- Fiber-reinforced polymer composites
- Spectroscopy and Chemometric Analyses
- Spectroscopy Techniques in Biomedical and Chemical Research
- Mechanical Behavior of Composites
- Photopolymerization techniques and applications
- Analytical Chemistry and Sensors
- Corrosion Behavior and Inhibition
- Conducting polymers and applications
- Phosphorus compounds and reactions
- Polymer composites and self-healing
- Mesoporous Materials and Catalysis
- Optical Polarization and Ellipsometry
- Thermography and Photoacoustic Techniques
- Advanced Polymer Synthesis and Characterization
- Microwave-Assisted Synthesis and Applications
- biodegradable polymer synthesis and properties
- Surface Roughness and Optical Measurements
- Polymer Science and PVC
Case Western Reserve University
2016-2025
Jiangsu University
2017
Yazaki (United States)
2013
Bilkent University
2011
Sekisui Chemical (Japan)
2008
Max Planck Institute for Polymer Research
1998-2003
Chulalongkorn University
2001
Osaka University
2001
U.S. National Science Foundation
1996-1999
Toray Industries, Inc. (Japan)
1998
Abstract Compounds with bifunctional benzoxazine groups in their molecular structures form crosslinked characteristic of phenolic materials through a ring‐opening reaction mechanism. This family compounds offers greater flexibility than conventional novolac or resole resins terms design. It is also superior to resin process control since it releases no by‐product during curing reactions. The thus obtained exhibit excellent mechanical integrity glass transition temperatures over 200°C....
A new class of phenolic-like thermosetting resins has been developed that is based on the ring-opening polymerization a benzoxazine precursor. These materials were to combine thermal properties and flame retardance phenolics with mechanical performance molecular design flexibility advanced epoxy systems. The polybenzoxazines overcome many traditional shortcomings conventional novolak resoletype phenolic resins, while retaining their benefits. physical these are investigated shown compare...
Benzoxazine-based phenolic resin has recently attracted a great deal of attention due to its versatile properties. This paper explores yet another interesting property shown by this class resin: volumetric expansion upon polymerization. It is proposed that the benzoxazine mostly consequence molecular packing influenced inter- and intramolecular hydrogen bonding. The role bonding on been studied systematically changing primary amine used in monomer synthesis. In comparison other known...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopic Studies of Poly[N,N'-bis(phenoxyphenyl)pyromellitimide]. 1. Structures the Polyimide and Three Model CompoundsHatsuo Ishida, Stephen T. Wellinghoff, Eric Baer, Jack L. KoenigCite this: Macromolecules 1980, 13, 4, 826–834Publication Date (Print):July 1, 1980Publication History Published online1 May 2002Published inissue 1 July 1980https://pubs.acs.org/doi/10.1021/ma60076a011https://doi.org/10.1021/ma60076a011research-articleACS...
Polymerization of benzoxazine resins is indicated by the disappearance a 960–900 cm–1 band in infrared spectroscopy (IR). Historically, this was assigned to C–H out-of-plane bending benzene which oxazine ring attached. This study shows that mixture O–C2 stretching and phenolic vibrational modes. Vibrational frequencies 3-phenyl-3,4-dihydro-2H-benzo[e][1,3]oxazine (PH-a) 3-(tert-butyl)-3,4-dihydro-2H-benzo[e][1,3]oxazine (PH-t) are compared with isotope-exchanged all-substituted compounds....
A novel difunctional benzoxazine with o-trifluoroacetamide functionality has been synthesized via Mannich condensation. The chemical structure of monomer also confirmed by 1H, 13C, and 19F nuclear magnetic resonance (NMR) spectroscopy Fourier transform infrared (FT-IR) spectroscopy. ring-opening polymerization the resin subsequent conversion freshly generated polybenzoxazine into polybenzoxazole are studied FT-IR differential scanning calorimetry (DSC). In addition to advantage low...
The present study reports for the first time use of biobased chitosan-polybenzoxazine (CTS-PBZ) as a precursor high CO2 adsorbing carbon aerogels (CAs). Montmorillonite (MMT) is used to reinforce CTS-PBZ aerogel. MMT-CTS-PBZ nanocomposite are synthesized using freeze-drying technique and then cross-linked via ring-opening polymerization benzoxazine followed by carbonization at 800 °C. Polybenzoxazine improves structural stability removing from environment even pressure. properties polymeric...
A novel approach to nanocomposite preparation utilizing a swelling agent, monomer or polymer known intercalate/exfoliate smectite clay, has allowed the of several new nanocomposites. Present in small amounts, agent serves swell clay layers, allowing organic matrix be virtually any polymer. Twenty-four polymers are used this study, varying solubility parameter, molecular weight, and polarity. Many these do not yield structure by simple melt mixing Although some capable partial intercalation...
Abstract A series of benzoxazine compounds have been prepared from different bifunctional phenols and primary amines the molecular compositions precursors are characterized by nuclear magnetic resonance, Fourier transform infrared, size exclusion chromatography. It has demonstrated that design structures precursors, therefore tailoring network architectures, new phenolic materials with superior mechanical thermal properties, ease‐of‐processing characteristics can be obtained. The dynamic...
Several numerical integration methods are compared in order to search out the most effective method for Kramers-Kronig transformation, using analytical formula of transformation a Lorentzian function as reference. The be involve use (1) Maclaurin's formula, (2) trapezium (3) Simpson's and (4) successive double Fourier transform methods. It is found that which no special approximation necessary pole part integration, gives accurate results, also its computation time short. Successive less...