A novel ultra low-k nanocomposites of benzoxazinyl modified polyhedral oligomeric silsesquioxane and cyanate ester

Zhang, Shuai; Yan, Yihan; Li, Xiaodan; Fan, Haojun; Ran, Qichao; Fu, Qiang; Gu, Yi

doi:10.1016/j.eurpolymj.2018.03.013

Cited by 68 publications

(27 citation statements)

References 37 publications

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“…This is very different from the DSC curve of the previously studied POSS-modified phthalonitrile [22]. This difference is attributed to the much higher exotherm of NCE [37,38] during the reaction than that of phthalonitrile resin. This masks the endothermic and exothermic peaks in the DSC curves of phthalonitrile resins.…”

Section: Resultscontrasting

confidence: 72%

Blends of Cyanate Ester and Phthalonitrile–Polyhedral Oligomeric Silsesquioxane Copolymers: Cure Behavior and Properties

Zhou

Zheng

et al. 2019

Polymers

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Blends of cyanate ester and phthalonitrile–polyhedral oligomeric silsesquioxane copolymers were prepared, and their cure behavior and properties were compared via differential scanning calorimetry (DSC) analysis, thermogravimetric (TG) analysis, dynamic mechanical analysis, Fourier-transform far-infrared (FTIR) spectroscopy, and rheometric studies. The copolymer blends showed high chemical reactivity, low viscosity, and good thermal stability (TG temperatures were above 400 °C). The glass-transition temperature of the blends increased by at least 140 °C compared to cyanate ester resin. The blends are suitable for preparing carbon-fiber-reinforced composite materials via a winding process and a prepreg lay-up process with a molding technique. The FTIR data showed that the polymerization products contained triazine-ring structures that were responsible for the superior thermal properties.

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Section: Resultscontrasting

confidence: 72%

Blends of Cyanate Ester and Phthalonitrile–Polyhedral Oligomeric Silsesquioxane Copolymers: Cure Behavior and Properties

Zhou

Zheng

et al. 2019

Polymers

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“…After curing at 180 C/1 h, the oxazine ring (920 cm À1 ) characteristic peak was decreased, simultaneously, the hydroxyl peak (3379 cm À1 ) was increased, indicating that the benzoxazine resin had undergone a ring-opening reaction. 20,28 With the rise of curing temperature, the cyano group (2274 and 2236 cm À1 ) characteristic absorption peak intensities gradually weakened, and hydroxyl peak (3379 cm À1 ) disappeared, and the triazine ring (1563 and 1366 cm À1 ) absorption peaks appeared at the same time, 29 which indicates that the phenolic hydroxyl group participates in the crosslinking of the CE resin. According to previous research, 30,31 the possible CE/P-a copolymerization process is shown in Scheme 2.…”

Section: Curing Processing Of Different Copolymersmentioning

confidence: 99%

Curing kinetics and mechanical properties of cyanate ester/hyperbranched benzoxazine copolymers

Wang

Qin

et al. 2022

Polymers for Advanced Techs

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In the current study, three different curing kinetics models were used to analyze the curing kinetics of hyperbranched benzoxazine (HB‐PED230) and monofunctional benzoxazine (P‐a) modified cyanate ester (CE) resin by non‐isothermal differential scanning calorimeter. Moreover, the effects of two benzoxazines on the copolymerization behavior, thermal stability, and mechanical properties of CE resin were studied. Compared with the P‐a modified CE resin, HB‐PED230 greatly reduces the curing temperature of the copolymer, while improving the bending strength and impact strength. The curing temperature of HB‐PED230 modified CE resin was 79°C lower than neat CE resin, while the CE/P‐a blended resin only reduce 48°C. As the amount of HB‐PED230 increased, the flexural strength and flexural modulus of the copolymers were improved. Surprisingly, when 7 wt% of HB‐PED230 was added, the impact strength of the copolymer was increased by 177.6%, implying that the toughness of CE resin had been greatly improved. Moreover, the fracture morphology of the copolymers was observed by scanning electron microscope. In summary, a small amount of HB‐PED230 blending can effectively improve the overall performance of CE resin.

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“…To improve the controllability of the prepolymerization process, catalysts may be used to reduce the reaction temperature and shorten the polymerization time by controlling the formation of the dimer and triazine ring. 14 –18 Compounds containing active hydrogen and transition metal catalysts are often used to catalyze the curing reaction of cyanate esters. 2,19 –21 For active hydrogen-containing compounds, these small molecular catalysts remain in the prepolymer system, which will induce internal stress and defects in the cured resin.…”

Section: Introductionmentioning

confidence: 99%

Preparation of hybrid cyanate ester resin in the presence of polysilazane and its properties

Huo

Guo

Wang

et al. 2020

High Performance Polymers

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A hybrid cyanate ester resin containing polysilazane was prepared via the prepolymerization of bisphenol-A dicyanate ester monomer (BADCy) in the presence of polysilazane (PSZ) under low temperature conditions in a short period of time. Fourier transform-infrared (FT-IR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy reveal that the polymerization reaction of BADCy can be carried out in the presence of PSZ to obtain a hybrid resin below 100°C and polymethylsilazane (PHS) exhibits an improved prepolymerization effect when compared to polydimethylsilazane (PMS). FT-IR spectroscopy and gel permeation chromatography (GPC) showed that the prepolymerization degree of the PHS/BADCy resin increased upon increasing PHS mass fraction from 0 to 12 wt%, polymerization temperature from 60 to 100°C and polymerization time from 0 to 4 h. The PHS/BADCy hybrid resins samples were prepared and their process properties were investigated by rheometry and Differential scanning calorimetry (DSC). The results indicated that their viscosity was <10 Pa.s in the temperature range of 60–130°C, and the initial curing temperature and curing exothermic enthalpy were 121.9°C and 358.9 J/g, respectively. Furthermore, the cured PHS/BADCy resin possesses excellent thermal and mechanical properties, the 5% weight loss temperature (Td5) and glass transition temperature (Tg) were 424–441°C and 273–282°C, respectively. The cured PHS/BADCy resin with 4 wt% PHS showed the highest flexural strength of 146 MPa and flexural modulus of 4.1 GPa.

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A novel ultra low-k nanocomposites of benzoxazinyl modified polyhedral oligomeric silsesquioxane and cyanate ester

Cited by 68 publications

References 37 publications

Blends of Cyanate Ester and Phthalonitrile–Polyhedral Oligomeric Silsesquioxane Copolymers: Cure Behavior and Properties

Blends of Cyanate Ester and Phthalonitrile–Polyhedral Oligomeric Silsesquioxane Copolymers: Cure Behavior and Properties

Curing kinetics and mechanical properties of cyanate ester/hyperbranched benzoxazine copolymers

Preparation of hybrid cyanate ester resin in the presence of polysilazane and its properties

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