Temperature effects on rigid nano‐silica and soft nano‐rubber toughening in epoxy under impact loading

Huang, Dedong; Xu, Feng; Du, Xusheng; Lee, Zheng-Hang; Xiao-jun, Wang

doi:10.1002/app.45319

Cited by 14 publications

(8 citation statements)

References 36 publications

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“…However, this highly cross‐linked structure makes the epoxy resins brittle and vulnerable to cracks, causing limitations in the large‐scale production . A numerous studies have been conducted to enhance the toughness of the cured epoxy resins without a significant decrease in the other properties via modification with toughening agents including rubber particles, nanoscale or colloidal particles, and block copolymers …”

Section: Introductionmentioning

confidence: 99%

High‐toughness, environment‐friendly solid epoxy resins: Preparation, mechanical performance, curing behavior, and thermal properties

Yang

Wang

et al. 2019

J of Applied Polymer Sci

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The development of a facile and efficient approach to prepare high-toughness epoxy resin is vital but has remained an enormous challenge. Herein, we have developed a high-performance environment-friendly solid epoxy resin modified with epoxidized hydroxylterminated polybutadiene (EHTPB) via one-step melt blending. The characterization, mechanical performance, curing behavior, and thermal properties of EHTPB-modified epoxy resin were investigated. EHTPB-modified epoxy resin exhibited excellent toughness with a 100% increase in elongation at break of tensile than that of neat epoxy resin. The transfer stress and dissipated energy in the rubber phase were predominant mechanisms of toughening. The toughening effect of EHTPB on solid epoxy resin was better than that of some of the previously reported liquid epoxy resins. Meanwhile, at 10 wt % of EHTPB loading, the EHTPB-modified epoxy resin displayed high strength and 22 and 101% improvement of flexural strength and impact strength, respectively. Moreover, at 10 wt % of EHTPB loading, the activation energy of EHTPB-modified epoxy resin for curing reaction decreased from 73.89 to 65.12 kJÁmol −1 , which is beneficial for the curing reaction. Furthermore, EHTPB-modified epoxy resin had a good thermal stability and the initial degradation temperature increased from 249 to 313 C at 10 wt % of EHTPB loading. This work provides a simple-preparation and highly efficient and large-scale approach for the production of high-toughness environment-friendly solid epoxy resins.

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Section: Introductionmentioning

confidence: 99%

High‐toughness, environment‐friendly solid epoxy resins: Preparation, mechanical performance, curing behavior, and thermal properties

Yang

Wang

et al. 2019

J of Applied Polymer Sci

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“…12c, c′ and d, d′ ), which can dissipate the energy effectively during the crack propagation. 59 Therefore, the fracture resistance of epoxy resins is effectively enhanced by the high concentrations of PIL due to the synergistic effects of multi toughening mechanisms. This is similar to systems of rubber 60 and copolymers 61 toughened epoxy.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of poly(ionic liquid) for trifunctional epoxy resin with simultaneously enhancing the toughness, thermal and dielectric performances

Yin

Liu

et al. 2020

RSC Adv.

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“…As shown in Figs. 2(A)-2(F), the fracture surface of cured neat epoxy system is relatively smooth and flat except for some river-like lines, typical for a brittle failure [33,43]. In contrast, the fracture surface of cured CATA 1is rougher than that of neat epoxy system and shows signs of fibrils formation.…”

Section: Morphologymentioning

confidence: 95%

Bio-Based Hyperbranched Toughener From Tannic Acid and Its Enhanced Solvent-Free Epoxy Resin with High Performance

Xu¹,

Yang²,

Wang³

et al. 2019

Journal of Renewable Materials

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It is essential to design economic and efficient tougheners to prepare high-performance epoxy resin; however, this has remained a huge challenge. Herein, an eco-friendly, low-cost, and facile-fabricated bio-based hyperbranched toughener, carboxylic acid-functionalized tannic acid (CATA), was successfully prepared and applicated to the preparation of solvent-free epoxy resins. The mechanical performance, morphology, structural characterization, and thermal characterization of toughened epoxy resin system were studied. The toughened epoxy resin system with only 1.0wt% CATA reached the highest impact strength, 111% higher than the neat epoxy resin system. Notably, the tensile strength and elongation at break of toughened epoxy resin systems increased moderately with increasing CATA loading. Nonphase-separated hybrids with significant toughening effect were obtained. Additionally, the thermal stabilities of toughened epoxy resin systems decreased with increasing CATA loading. This study provides an eco-friendly, cost-effective, and facile approach for the preparation of high-performance, solvent-free epoxy resins with potential for practical applications in sealing integrated circuits and electrical devices fields.

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Temperature effects on rigid nano‐silica and soft nano‐rubber toughening in epoxy under impact loading

Cited by 14 publications

References 36 publications

High‐toughness, environment‐friendly solid epoxy resins: Preparation, mechanical performance, curing behavior, and thermal properties

High‐toughness, environment‐friendly solid epoxy resins: Preparation, mechanical performance, curing behavior, and thermal properties

Synthesis of poly(ionic liquid) for trifunctional epoxy resin with simultaneously enhancing the toughness, thermal and dielectric performances

Bio-Based Hyperbranched Toughener From Tannic Acid and Its Enhanced Solvent-Free Epoxy Resin with High Performance

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