TEST METHODS AND RESEARCHES THERMOSETTING BINDING FOR POLYMERIC COMPOSITE MATERIALS (review)

Petrova, A. P.; Mukhametov, R. R.; Shishimirov, M. V.; Pavlyuk, B.Ph.; Старостина, И. В.

doi:10.18577/2307-6046-2018-0-12-62-70

Cited by 7 publications

(3 citation statements)

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“…The curing process of a series of phenol and diamines based benzoxazines: P‐ddm; P‐4,4′oda; P‐3,4′oda; P‐ot; P‐mt; P‐bapp P‐tper was performed using DSC. DSC analysis is an important method for studying thermosetting binders, which allows one to study a wide range of important characteristics on a relatively small amount of substance 38 . Samples of polybenzoxazines were obtained by curing the monomers according to the following modes: 1 h at 150°C, 2 h at 180°C and 2 h at 200°C, similar to diphenol‐based benzoxazines 28 (mode 1) and with additional post‐curing at 2 h at 220°C and 1 h at 240°C (mode 2).…”

Section: Resultsmentioning

confidence: 99%

“…DSC analysis is an important method for studying thermosetting binders, which allows one to study a wide range of important characteristics on a relatively small amount of substance. 38 Samples of polybenzoxazines were obtained by curing the monomers according to the following modes: 1 h at 150 C, 2 h at 180 C and 2 h at 200 C, similar to diphenol-based benzoxazines 28 (mode 1) and with additional post-curing at 2 h at 220 C and 1 h at 240 C (mode 2). The numerical results are shown in Table 2 and the curves are shown in Figure 4.…”

Section: Synthesis and Thermal Characteristics Of Monomers And Polymentioning

confidence: 99%

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Benzoxazine monomers based on aromatic diamines and investigation of their polymerization by rheological and thermal methods

Sarychev

Киреев

Khmelnitskiy

et al. 2020

J of Applied Polymer Sci

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In the present article with the aim to find new polybenzoxazines with improved thermal properties, new benzoxazine monomers based on phenol and the following aromatic diamines were synthesized: 3,4 0-oxydianiline (P-3,-4 0 oda); o-tolidine (P-ot); m-tolidine (P-mt) and 4,4 0-(1,3-phenylenedioxy) dianiline (P-tper) and their comparison with the previously known benzoxazines based on 4,4 0-diaminodiphenylmethane (P-ddm); 4,4 0oxydianiline (P-4,4 0-oda) and 2,2-Bis[4-(4-aminophenoxy)phenyl]propane (Pbapp). The dependence of the thermal and rheological characteristics on the structure of benzoxazine monomers based on various diamines was estimated and possible methods for their processing were identified. All the polybenzoxazines obtained in this work have high char yield and reduced flammability. It was found that the structure of the diamine can have a fundamental effect on both the rheological properties and heat resistance of polybenzoxazines. The benzoxazine monomers P-ddm, P-tper and P-4,4 0 oda retain viscosity up to 1 Pa s. at 110 C for 2 h, the P-tper monomer with a resorcinol bridge has about five times lower viscosity compared to the P-bapp monomer with a bisphenol A bridge. Polybenzoxazines based on the monomers P-ddm, P-mt, P-bapp and P-tper show excellent thermal stability with a temperature of 10% weight loss above 400 C. In particular, T g of P-3,4 0 oda and P-mt monomers is relatively high (202 and 239 C, respectively), while P-ot's is unusually low (115 C), which may be caused by the specific effect of the substituents in the aromatic ring of the amine and their position.

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Section: Resultsmentioning

confidence: 99%

Section: Synthesis and Thermal Characteristics Of Monomers And Polymentioning

confidence: 99%

Benzoxazine monomers based on aromatic diamines and investigation of their polymerization by rheological and thermal methods

Sarychev

Киреев

Khmelnitskiy

et al. 2020

J of Applied Polymer Sci

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“…Дополнительно оценивали жизнеспособность некатализированных композиций, исследуя динамическую вязкость сразу после приготовления и через 30 суток при комнатной температуре, поскольку одной из важных характеристик связующих для ПКМ является сохранение реологических свойств длительное время без использования специальных методов хранения и транспортировки [27,28].…”

Section: рис 3 кривые динамической вязкости композиций 58unclassified

A study of the polymerization of a monofunctional benzoxazine monomer based on phenol and aniline and its copolymerization with epoxy resins

et al. 2021

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In the work, the liquid monofunctional benzoxazine monomer based on phenol and aniline (P-a) was synthesized in melt and benzoxazine-epoxy compositions based on it were obtained. The processes of polymerization of a benzoxazine monomer and its copolymerization with epoxy resins of various structures and functionality in catalyzed and non-catalyzed systems have been investigated, and the rheological properties of the compositions have been evaluated. For the obtained polybenzoxazines and benzoxazine-epoxy copolymers, the thermal characteristics were determined, in particular, the glass transition temperature, the temperature of the onset of intense destruction and the coke residue. It has been established that the structure and functionality of epoxy resins have a different effect on the thermal characteristics of the copolymers.

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Possibilities of Rheology in the Study of Binders for PCMs

Гусева

Petrova

2022

Polym. Sci. Ser. D

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TEST METHODS AND RESEARCHES THERMOSETTING BINDING FOR POLYMERIC COMPOSITE MATERIALS (review)

Cited by 7 publications

References 0 publications

Benzoxazine monomers based on aromatic diamines and investigation of their polymerization by rheological and thermal methods

Benzoxazine monomers based on aromatic diamines and investigation of their polymerization by rheological and thermal methods

A study of the polymerization of a monofunctional benzoxazine monomer based on phenol and aniline and its copolymerization with epoxy resins

Possibilities of Rheology in the Study of Binders for PCMs

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