Thermal and mechanical properties of azomethine functionalized cyanate ester/epoxy blends

Sakthidharan, C. P.; Sundararajan, P. R.; Sarojadevi, M.

doi:10.1039/c4ra16004e

Cited by 17 publications

(16 citation statements)

References 33 publications

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“…The –OH peak is obtained at 10.1 ppm. The peak at 8.4 ppm corresponds to the hydrogen in azo methine Group . The peak at 5.4 ppm represents the –CH group.…”

Section: Resultsmentioning

confidence: 99%

“…At the same time azo methine linkages can be included in the main or side chains which can improve thermal stabilitiy due to the high bond dissociation energies needed for breaking the HC = N bonds. In earlier reported works on cyanate ester based addition polymers, it is proved that azo methine groups increase the thermal stability of polymers .…”

Section: Introductionmentioning

confidence: 96%

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Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

et al. 2018

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A new diamine monomer having ether and azomethine linkages in the long pendent group was synthesized. New polyimide was prepared by reacting the new diamine with BTDA and nanocomposites were prepared with silicon dioxide as nanofiller. SEM analysis shows a uniform distribution of the nanopowder in the polyimide matrix. TGA shows that the polyimide and nanocomposites have good thermal stability with the T10% values varying between 440 and 458°C. DSC analysis shows Tg values between 210 and 230°C. The neat polyimide shows high elongation at break and stretchability (260%) but low tensile strength. The nanocomposites of polyimide show lower elongation at break but have improved tensile strength. The chemically imidised polyimide shows good solubility in solvents like N, N‐dimethyl formamide, N, N‐dimethyl acetamide, and N‐methyl 2‐pyrrollidone. POLYM. COMPOS., 40:832–843, 2019. © 2018 Society of Plastics Engineers

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“…The –OH peak is obtained at 10.1 ppm. The peak at 8.4 ppm corresponds to the hydrogen in azo methine Group . The peak at 5.4 ppm represents the –CH group.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

et al. 2018

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“…[10,32,37,38] Therefore, the toughening effect of cyanate resin modified by epoxy resin is greatly limited. [10,34,38,39] In this article, a new method for EP-modified CE is shown to improve toughness by introducing phase separated structures through blending EP with CE. An epoxy prepolymer (PreEP) with several ethylene oxide groups is prepared by modulating the amount of curing agents.…”

Section: Introductionmentioning

confidence: 99%

Improving the toughness of polycyanate ester by adding epoxy pre‐polymer with different molecular weights

Huang

et al. 2020

J of Applied Polymer Sci

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The toughness of polycyanate ester is improved by adding epoxy pre‐polymer with varying molecular weights. The curing mechanism of epoxy prepolymer (PreEP) and cyanate ester (CE) is discussed based on differential scanning calorimeters and Fourier‐transform infrared spectroscopy. The mechanical, phase separated structures and thermal properties of PreEP/CE are also evaluated. It is found that the molecular weight of PreEP can reach 1,800 when it is cured at 90°C for 45 min by using a set amount of polyetheramine. Meanwhile, by increasing the molecular weight of the prepolymer, the mechanical properties of PreEP/CE show increased first, and then decreased. 0.2 PreEP/CE has the highest bending strength and impact strength (105.8 MPa and 18.3 kJ·m−2). There are 26.7 and 114.5% higher than those of polycyanate ester, respectively. The tougher PreEP/CE is attributable to the phase‐separated structures and the decrease in the cross‐linked product (Oxazolidinone) in PreEP and CE. The method showed in this article provides a new way to improve the toughness properties of thermoset resin.

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“…Cyanate ester (CE), a thermosetting resin which possesses excellent properties including electrical and thermal conductivities, good chemical stability, mechanical properties and low shrinkage and moisture absorption rate, is widely used in the aerospace eld. [1][2][3] However, the main weakness of CE is the high brittleness aer curing and this restricts its extensive application from the mechanics viewpoint. [4][5][6] The common method to improve toughness in a material is incorporating toughening modiers, such as elastomers, thermoplastics, thermosetting resins, and organic or inorganic llers, [7][8][9][10] into polymers.…”

Section: Introductionmentioning

confidence: 99%

Toughening of POSS–MPS composites with low dielectric constant prepared with structure controllable micro/mesoporous nanoparticles

et al. 2018

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Thermal and mechanical properties of azomethine functionalized cyanate ester/epoxy blends

Abstract: A series of azomethine fictionalized cyanate ester and its epoxy blends were prepared and characterized.

Cited by 17 publications

References 33 publications

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

Improving the toughness of polycyanate ester by adding epoxy pre‐polymer with different molecular weights

Toughening of POSS–MPS composites with low dielectric constant prepared with structure controllable micro/mesoporous nanoparticles

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