Progress in improving high-temperature properties of thermosetting resins: development of the microheterogeneous model for the formation of crosslinked rolivsan-epoxy blends

Zaitsev, B. А.; Shvabskaya, I. D.; Kleptsova, L. G.

doi:10.1007/s10965-016-0982-9

Cited by 5 publications

(62 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zaitsev et al . used thermochemical transformations in blends of Rolivsans with epoxy resins to obtain new glassy heat‐resistant highly crosslinked Rolivsans/epoxy blends (block copolymers) . Unusually high values of high‐temperature strength of the epoxy‐modified Rolivsans were when using this method was used to enhance the heat resistance and thermal stability of micro‐heterogeneous network polymers (cured resins) consisting of highly crosslinked microdomains.…”

Section: Trend and Future Explorationmentioning

confidence: 99%

Temperature effects on structural integrity of fiber‐reinforced polymer matrix composites: A review

Pei

Han

Ding

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

Fiber‐reinforced polymer matrix composites (FRPMCs) are the most promising and valuable material developed in the last few decades. In response to the increased research and publications concerning the thermal stability of FRPMCs, this review has culled typical journals for publications relevant to structural stability. In this review, the effects of temperature on the structural integrity of FRPMCs are discussed from the perspective of matrix types, fiber types, nanoparticle (NP) modifications on resin matrix, and various related mechanical properties. For NP‐modified FRPMCs, characterization of all anisotropic properties under various strain rates and temperatures becomes essential for analysis, design, and numerical simulations. Improving the structural stability of FRPMCs at different temperatures is an important direction. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48206.

show abstract

Section: Trend and Future Explorationmentioning

confidence: 99%

Temperature effects on structural integrity of fiber‐reinforced polymer matrix composites: A review

Pei

Han

Ding

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Rolivsan thermosetting resins (ROLs) are a new class of unsaturated thermosetting resins featuring high glass-transition temperatures (T g ), excellent processability, low relative permittivity and mechanical losses, low moisture absorption, good mechanical properties, and satisfactory compatibility with various substrates [1][2][3]. They are obtained via acidcatalyzed reactions between disecondary aliphatic-aromatic diol (bis-(4-(α-hydroxyethyl)phenyl) ether) (BHEPE) and methacrylic acid (MAA) [1].…”

Section: Introductionmentioning

confidence: 99%

“…These reactions include dehydration, intramolecular cyclization (high-temperature acylation of neighboring aromatic units by MAA carboxyl groups and anhydrization of carboxyl groups of neighboring MAA units within the chain). Thus, the processes result in specific self-functionalization of polymer grains and interlayers between these grains [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…However, these latent compounds, which are present in IBGs as a peculiar kind of "microreactors," can be activated under the appropriate conditions (e.g., at elevated temperatures and/or after changing acidity of a medium). After activation, they take part in additional reactions of structurization (crosslinking) of supramolecular formations (grains and interlayers) in microheterogeneous network polymer [2,[5][6][7]. Thus, we propose to use certain implications of mechanism of the network formation as a new structure-forming tool for chemical modification of thermosets.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, we propose to use certain implications of mechanism of the network formation as a new structure-forming tool for chemical modification of thermosets. The method has turned out to be effective in improving physicomechanical, thermal, and other useful properties of thermosets, as was illustrated by the example of thermochemical transformations of ROLs in binary systems containing epoxy resins [2,3,5] and aromatic di-and tetraamines [3,[5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Studies of Formation Mechanism, Structure, and Properties of Network Copolymers Obtained by Cocuring of Rolivsan Thermosetting Resins with Aromatic Diamines

Zaitsev

Kleptsova

Shvabskaya

2019

International Journal of Polymer Science

View full text Add to dashboard Cite

Rolivsan thermosetting resins (ROLs) demonstrate high glass-transition temperatures and excellent processability. In our work, high-temperature properties of ROLs were significantly improved using a novel technique for structural and chemical modification of microheterogeneous network polymers. This technique involves, among other procedures, cocuring of rolivsan resins with aromatic diamines (ADA). The most noticeable increase in storage moduli and glass transition temperatures (Tg) of these copolymers was achieved when ROLs were modified with 10-15 wt.% of ADA and the resulting blends were subjected to thermal treatment in air in the temperature range 180 to 320°C for several hours. FTIR, 13С NMR spectroscopy, and dynamic mechanical and thermal analyses were used for studying the structure and properties of the obtained products. It was demonstrated that the mechanism of formation of ROL-ADA copolymers includes the following high-temperature reactions: (i) three-dimensional radical copolymerization of unsaturated ROL components and (ii) cleavage of heat-sensitive methacrylate crosslinking units inside the polymer network. The second process is accompanied by formation of pending units of methacrylic acid and methacrylic anhydride, which participate in condensation reactions with ADA.

show abstract

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

Zaitsev

Kleptsova

Shvabskaya

2023

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Progress in improving high-temperature properties of thermosetting resins: development of the microheterogeneous model for the formation of crosslinked rolivsan-epoxy blends

Cited by 5 publications

References 20 publications

Temperature effects on structural integrity of fiber‐reinforced polymer matrix composites: A review

Temperature effects on structural integrity of fiber‐reinforced polymer matrix composites: A review

Studies of Formation Mechanism, Structure, and Properties of Network Copolymers Obtained by Cocuring of Rolivsan Thermosetting Resins with Aromatic Diamines

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

Contact Info

Product

Resources

About