Volume fraction and temperature dependence of mechanical properties of silicone rubber particulate/epoxy blends

Misawa, Miwa; Takeno, Akiyoshi; Hara, Katsumi; Watanabe, Akira

doi:10.1016/s0010-4361(06)80136-9

Cited by 28 publications

(15 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In each case, the optimal concentration of a modifier depends on the modifier type and its concentration, since they determine the hydrodynamic and viscoelastic properties, as well as curing conditions. 4 Miwa et al 38 proposed that the optimum volume fraction of silicone rubber particles necessary to improve the impact fracture toughness (2.3 J/m) is 10 wt %. 36 The maximum impact energy (20 J/m) and fracture toughness were observed in epoxy blends modified with 10 wt % of NR.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Charpy impact strength of epoxy resin modified with vinyl‐terminated polydimethylsiloxane

Vilčáková

Kutějová

Jurča

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

This article deals with enhancement of the toughness of epoxy resin (ER) based on diglycidyl ether bisfenol A by either polydimethylsiloxane (PDMS) or vinyl-terminated polydimethylsiloxane (VT-PDMS). To improve the compatibility of these two phases, dicumylperoxide (DCP) was used as a compatibilizer. It was established that only specific composition of the components can lead to enhancement of ER toughness without significant reduction of storage modulus, T g , and interphase adhesion. The highest impact strength was recorded for ER with VT-PDMS (10 wt %) and DCP (2 wt %) due to increased interfacial compatibility between two phases, which was proved by 1 H NMR and dielectric spectroscopy. Critical ductile brittle transition occurring between 10 and 15 wt % of rubber was observed by both morphological and dynamic mechanical analysis studies. V C 2017 Wiley Periodicals, Inc. J. Appl.Polym. Sci. 2018, 135, 45720.

show abstract

Section: Introductionmentioning

confidence: 99%

“…33,34,[38][39][40][41][42][43][44][45][46] Peroxides usually serve as crosslinking or vulcanization agents. 33,34,[38][39][40][41][42][43][44][45][46] Peroxides usually serve as crosslinking or vulcanization agents.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Charpy impact strength of epoxy resin modified with vinyl‐terminated polydimethylsiloxane

Vilčáková

Kutějová

Jurča

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…All samples have similar maximum extensions (314-429%). For silicone elastomers the temperature dependency on mechanical properties is weak [32] so no full temperature range characterization has been performed.…”

Section: Chemical and Mechanical Analysis Of The Prepared Elastomersmentioning

confidence: 99%

Degradation patterns of silicone-based dielectric elastomers in electrical fields

Madsen

Skov

2017

International Journal of Smart and Nano Materials

View full text Add to dashboard Cite

Silicone elastomers have been heavily investigated as candidates for the flexible insulator material in dielectric elastomer transducers and are as such almost ideal candidates because of their inherent softness and compliance. However, silicone elastomers suffer from low dielectric permittivity. This shortcoming has been attempted optimized through different approaches during recent years. Material optimization with the sole purpose of increasing the dielectric permittivity may lead to the introduction of problematic phenomena such as premature electrical breakdown due to high leakage currents of the thin elastomer film. Within this work, electrical breakdown phenomena of various types of permittivity-enhanced silicone elastomers are investigated. Results showed that different types of polymer backbone chemistries lead to differences in electrical breakdown patterns, which were revealed through SEM imaging. This may pave the way towards a better understanding of electrical breakdown mechanisms of dielectric elastomers and potentially lead to materials with increased electrical breakdown strengths.

show abstract

“…Many efforts [1][2][3][4][5][6][7][8][9] have been made to improve the resins' toughness, including the use of rigid particles, pre-formed rubber particles, liquid crystalline epoxy resins, thermoplastics and liquid rubbers. Liquid rubber modification is one of the most frequently used methods for toughening epoxy resins.…”

Section: Introductionmentioning

confidence: 99%

“…Sultan and co-workers [10,11] first discovered that the fracture toughness of epoxies could be improved by the introduction of a dispersed rubber phase. Two main toughening mechanisms have been identified [12][13][14]: (1) localized shear yielding of the epoxy matrix, with the shear bands running between rubber particles and (2) internal cavitation, or debonding, of the rubber particles which enables plastic void growth in the epoxy matrix. The numerical analyses have shown how the sequence of initiation between the two main mechanisms of toughening observed in rubber-toughened epoxy polymers is strongly dependent on the properties of the rubbery particle and, in particular, the value of the Poisson's ratio.…”

Section: Introductionmentioning

confidence: 99%

The Miscibility of Novel Bisphenol-Propylene Epoxy Resin With Liquid NBR

Zhang

Zhai

Kim

2008

Journal of Adhesion Science and Technology

View full text Add to dashboard Cite

A novel kind of bisphenol-type epoxy resin with a vinyl side-chain was developed and its miscibility behavior with liquid nitrile-butadiene rubber (NBR) was investigated. The diglycidyl ether of bisphenol propylene (DGEBP) was prepared by the condensation of phenol with acrolein in the presence of an acid catalyst and the subsequent epoxidization with epichlorohydrin (ECH). The structures of the bisphenol and corresponding epoxy resin were characterized by infrared (IR) and nuclear magnetic resonance (NMR) spectral analyses and the epoxy value was determined to be 0.34 mol/100 g by titration. The mixture of DGEBP with the liquid NBR containing diglycidyl ether of bisphenol acetone (DGEBA) was prepared and cured with diaminodiphenylmethane (DDM). The miscibility and morphology of the mixture system were studied by dynamic mechanical thermal analysis (DMTA) and transmission electron microscopy (TEM), respectively. The cured mixture of DGEBP/NBR/DDM exhibited good miscibility and, therefore, no separation, along with a transparent appearance at rubber contents of 10 wt% and 30 wt%. For cured DGEBP/DGEBA/NBR/DDM systems at 20 wt% rubber content, the dispersed rubber phase and rubber particles were not observed by DMTA or TEM at DGEBP content above 40 wt%. The DMTA plot showed a single peak related to the glass transition temperature (T g ) which decreased with increasing DGEBP content. The appearance of the system varied from transparent to opaque and the rubber separated from the epoxy matrix to form two phases when the DGEBP content decreased. The T g values of the rubber-and epoxy-rich phases were strongly dependent on the DGEBP content in the mixed system. The miscibility of epoxy resin with liquid NBR can be altered by varying the ratio of DGEBP to DGEBA.

show abstract

Volume fraction and temperature dependence of mechanical properties of silicone rubber particulate/epoxy blends

Cited by 28 publications

References 42 publications

Enhanced Charpy impact strength of epoxy resin modified with vinyl‐terminated polydimethylsiloxane

Enhanced Charpy impact strength of epoxy resin modified with vinyl‐terminated polydimethylsiloxane

Degradation patterns of silicone-based dielectric elastomers in electrical fields

The Miscibility of Novel Bisphenol-Propylene Epoxy Resin With Liquid NBR

Contact Info

Product

Resources

About