Epoxy resin cure. I. Fluorine‐19 NMR of boron trifluoride monoethylamine and fluoroboric acid

Smith, Robert E.; Larsen, F.N.; Long, Charles L.

doi:10.1002/app.1984.070291206

Cited by 24 publications

(9 citation statements)

References 8 publications

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“…As can be seen, the DSC scans show multiple peaks that are symptomatic of complex reactions. The mechanism of catalysis by BF 3 ·MEA and related compounds in epoxy curing is still not fully understood, but the lower temperature DSC peak is caused by the thermal conversion of BF 3 ·MEA to HBF 4 ,21 whereas the peak at the higher temperature can be attributed to the catalyzed addition reaction of the primary and secondary amines to the epoxy groups. The temperature of the exothermic peak of this reaction can be taken to be indicative of the reactivity of the compositions under curing.…”

Section: Resultsmentioning

confidence: 99%

Development of novel phosphorus‐containing epoxy resins from renewable resources

Lligadas

Ronda

Galià

et al. 2006

J. Polym. Sci. A Polym. Chem.

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Novel biobased epoxy resins were prepared from two fatty acid derivatives; epoxidized 10‐undecenoyl triglyceride and epoxidized methyl 3,4,5‐tris(10‐undecenoyloxy)benzoate, with 4,4′‐diaminodiphenylmethane as a crosslinking agent. The flame retardancy of these epoxy resins was improved by the addition of 10‐[2′, 5′‐bis(9‐oxiranyl‐nonayloxy)phenyl]‐9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide and by crosslinking with a phosphorus‐containing curing agent, bis(m‐aminophenyl)methylphosphine oxide. The thermal, thermomechanical, and flame‐retardant properties of the cured materials were measured with differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, and the limiting oxygen index. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 6717–6727, 2006

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Section: Resultsmentioning

confidence: 99%

Development of novel phosphorus‐containing epoxy resins from renewable resources

Lligadas

Ronda

Galià

et al. 2006

J. Polym. Sci. A Polym. Chem.

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“…This was due to the previously reported thermal conversion of BF 3 ⅐ MEA to HBF 4 . 15 The second exotherm at 190°C was attributed to the catalyzed benzoxazine ring opening. Catalytic activity was higher for this Lewis acid.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of benzoxazine‐based phenolic resins: Crosslinking study

Espinosa

Cádiz

Galià

2003

J of Applied Polymer Sci

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Modified novolac resins with benzoxazine rings were prepared. The synthetic method involved the preparation of 1,3,5-triphenylhexahydro-1,3,5-triazine as an intermediate that further reacts with the novolac resin. The catalytic effects of phenols, carboxylic acids, and Lewis acids on the benzoxazine ring-opening polymerization were shown. The curing behavior of the benzoxazine compounds and the thermal properties of the cured resin were studied, and the results indicated improved degradation behavior for flammability. V-0 materials were obtained when the materials were tested for ignition resistance using the UL-94 test.

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“…53. In the presence of water, Ghaemy [265,266] as well as Smith et al [267,268], invoked the gradual hydrolysis of BF 3 into borate as a potential source of HF, which is able to generate HBF 4 or one of its salts from BF 3 .…”

Section: Page 27 Of 163mentioning

confidence: 98%

Control of reactions and network structures of epoxy thermosets

Vidil¹,

Tournilhac²,

Musso

et al. 2016

Progress in Polymer Science

293

252

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Recent advances in macromolecular chemistry have revolutionized the way we perceive the synthesis of polymers. Polymerization, to be modern, must be "controlled", which usually means capable of producing macromolecules of well-defined structure. The purpose of this review is to examine how the chemistry of epoxy resins, an almost century-old chemistry, is also involved in this movement. Epoxy resins are characterized by both the flexibility of implementation and the qualities of the polymers obtained. Key materials in health-, mobility-and energy related technologies, these resins are heavily present in high-performance composites, electronic boards, adhesives and coatings. Currently, a large number of resins and hardeners are available on the market or described in the literature and an interesting point is that almost any combination of the two is possible. Common to all these recipes and processes is that a liquid (or soluble) resin at some point becomes insoluble and solid. It is very important to know how to manage this transition, physically known as the gel point, as it is the point after which the shape of the object is irreversibly set. Taking into account the variety of epoxy polymerization processespolyaddition, anionic or cationic polymerization-we detail a number of methods to program the occurrence of the gel point and how this type of control affects the structure of the growing network.

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Epoxy resin cure. I. Fluorine‐19 NMR of boron trifluoride monoethylamine and fluoroboric acid

Cited by 24 publications

References 8 publications

Development of novel phosphorus‐containing epoxy resins from renewable resources

Development of novel phosphorus‐containing epoxy resins from renewable resources

Synthesis and characterization of benzoxazine‐based phenolic resins: Crosslinking study

Control of reactions and network structures of epoxy thermosets

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