Temperature dependence of the bonding strength of components of carbon plastics

Shul, Galyna; Gorbatkina, Yu. A.; Shchukina, L. A.

doi:10.1007/bf00617157

Cited by 2 publications

(5 citation statements)

References 2 publications

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“…Thus, the drop in values of the adhesive strength of organoplastics with increased test temperature is primarily determined by the varied properties of the matrices: the higher the glass transition temperature of the matrix, the higher the temperatures at which the fiber-matrix interface fractures. The data obtained confirm the conclusion made earlier [2,3,19] that the problem of preserving the high adhesive strength of polymers with fillers is directly associated with the problem of creating thermostable matrices.…”

supporting

confidence: 94%

“…This is clearly seen when comparing the data given in Tables I and 5. Tn thermal tests, the advantage of thermosetting matrices is most pronounced, i.e., even at 250~ the adhesive strength of bonds with a bismaleimide matrix and a Rolivsan binder decreases by 33-40% only (relative to the strength measured at room temperature). It should be noted that similar zo--T dependences were observed also for the bonds of the studied binders with carbon and steel fibers [19,20]. Thus, the drop in values of the adhesive strength of organoplastics with increased test temperature is primarily determined by the varied properties of the matrices: the higher the glass transition temperature of the matrix, the higher the temperatures at which the fiber-matrix interface fractures.…”

mentioning

confidence: 55%

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Effect of chemical nature of matrix on the strength of bonds with Armos aramide fibers

1998

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This investigation deals with adhesion between high-strength and high-modulus Armos aramide fibers (polyheteroarylene-co-p-phenyleneterephthalamide ) In [1][2][3][4], adhesion of thermosetting matrices to fibers based on rigid chain polymers (aramide SVM, VMN-88, and PBT polybenzothiazole fibers) was investigated. The data obtained allowed us to choose matrices for producing high-strength and high-modulus organoplastics with specified properties. For SVM polyheteroarylene fibers, the rules linking the mechanical characteristics of reinforced plastics with the interface strength in bonds of their components were determined. In this study, which is a continuation of a series of papers, adhesion of binders to Armos fibers is analyzed.

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confidence: 94%

mentioning

confidence: 55%

Effect of chemical nature of matrix on the strength of bonds with Armos aramide fibers

1998

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“…20 ROLs find applications as thermostable non-porous impregnating compounds (clear castings), sealing compounds, vacuum-dense glues, protective coatings, and binders for composites. 6,[9][10][11][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] The following polyfunctional compounds were studied as target additives (admixtures inactive in TFRP): epoxy resins, 10,11,[37][38][39][40][41][42][43] aromatic diamines, [44][45][46][47] aromatic tetra-amines and dianhydrides of aromatic tetracarbon acids. 48 Chemical modification with these compounds improved thermal, strength and adhesive properties of the cured ROLs.…”

Section: Modification Of Rolivsansmentioning

confidence: 99%

“…Non-catalyzed neat ROLs are rapidly cured at elevated temperatures 6,[9][10][11][12]16,[18][19][20][21][22][23][24][25][26][27][28][29][30]35,[42][43][44][45][46][47][48] or in the presence of acidic catalysts, 6,25 maleic anhydride, 36 bismaleimides, 36 etc. At 140-170 С, unsaturated aromatic ethers and esters incorporated into ROLs undergo threedimensional radical polymerization (TFRP) and yield a densely cross-linked glassy copolymer with a primary polymer network.…”

Section: Rolivsansmentioning

confidence: 99%

“…According to the results of earlier studies, the cured ROLs have high thermo‐oxidative stability (250–320°С) and good dielectric properties, which are resistant to hot strong acids and alkalis 20 . ROLs find applications as thermostable non‐porous impregnating compounds (clear castings), sealing compounds, vacuum‐dense glues, protective coatings, and binders for composites 6,9–11,21–36 …”

Section: Introductionmentioning

confidence: 99%

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Thermal and thermomechanical properties of rolivsan unsaturated resins co‐cured with bisphenol A dicyanate

Zaitsev

Kleptsova

Shvabskaya

2023

Polymer Engineering & Sci

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The present work discusses the experimental verification of the efficiency of a new method of chemical modification of thermosetting resins. The method is based on the use of (nano)micron-sized interlayers that appear between densely crosslinked grains of a glassy network polymer during threedimensional radical polymerization of unsaturated monomers (oligomers). These interlayers act as self-contained microreactors, into which different polyfunctional compounds can be introduced for carrying out the desired chemical reactions. Thermal and dynamic mechanical analysis, differential scanning calorimetry, and Fourier transform infrared spectroscopy were used to investigate the influence of regimes of thermocatalytic co-curing of rolivsan unsaturated resins (ROLs) with bisphenol A dicyanate (BADCy) on thermal and thermomechanical properties of the obtained crosslinked polymers. It was found that the cured ROL/BADCy blends with high (25-50 wt%) content of the BADCy component had less favorable thermal and mechanical parameters than the cured neat ROL. When the BADCy component of a ROL/BADCy blend played the role of a polyfunctional (modifying) additive (5-7.5 wt%) that migrated into "microreactors" and entered into ter-molecular and other reactions, the final cross-linked ROL-BADCy blends had better high-temperature strength, higher stability against thermo-oxidative and hydrolytic destruction than the individual components (i.e., the cured neat ROL and the cured neat BADCy). As the chemical structure may comprise two networks covalently bound to each other, they can be considered as block copolymers. The obtained results confirm the efficiency of the proposed method of chemical modification of unsaturated thermosetting resins, such as ROLs.

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Temperature dependence of the bonding strength of components of carbon plastics

Cited by 2 publications

References 2 publications

Effect of chemical nature of matrix on the strength of bonds with Armos aramide fibers

Effect of chemical nature of matrix on the strength of bonds with Armos aramide fibers

Thermal and thermomechanical properties of rolivsan unsaturated resins co‐cured with bisphenol A dicyanate

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