Simultaneous improvement of mechanical properties and curing temperature of cyanate ester resin by in situ generated modifier polymer having phenolic OH group

Polymer ◽  
2020 ◽  
Vol 202 ◽  
pp. 122611
Author(s):  
Keisuke Izu ◽  
Yuichiro Tokoro ◽  
Toshiyuki Oyama
Keyword(s):  
Mechanical Properties ◽  
Cyanate Ester ◽  
Curing Temperature ◽  
Cyanate Ester Resin

An in situ self-catalytic hybrid cyanate ester resin and its self-catalytic polymerization behavior

RSC Advances ◽  
2016 ◽  
Vol 6 (83) ◽  
pp. 80213-80220 ◽  
Author(s):  
Kangkang Guo ◽  
Ping Li ◽  
Yaping Zhu ◽  
Fan Wang ◽  
Huimin Qi
Keyword(s):  
Cyanate Ester ◽  
Catalytic Polymerization ◽  
Cyanate Ester Resin ◽  
Catalytic Function ◽  
Polymerization Behavior

A novolac cyanate ester (NCE) with self-catalytic function that incorporates –Si–NH–CN group has been synthesized through the reaction between methylvinylcyclotrisilazane (MVSZ) and novolac cyanate ester (NCE).

An in situ (K0.5Na0.5)NbO3-doped barium titanate foam framework and its cyanate ester resin composites with temperature-stable dielectric properties and low dielectric loss

2019 ◽  
Vol 3 (4) ◽  
pp. 726-736 ◽  
Author(s):  
Longhui Zheng ◽  
Li Yuan ◽  
Guozheng Liang ◽  
Aijuan Gu
Keyword(s):  
Dielectric Properties ◽  
Dielectric Loss ◽  
Barium Titanate ◽  
Cyanate Ester ◽  
Resin Composites ◽  
Cyanate Ester Resin ◽  
Low Dielectric ◽  
Doped Barium Titanate

High-k composites with temperature-stable dielectric properties and low dielectric loss obtained through building a network with in situ-doped barium titanate foam.

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

2020 ◽  
pp. 095400832095161
Author(s):  
Xiaomeng Huo ◽  
Kangkang Guo ◽  
Fan Wang ◽  
Yaping Zhu ◽  
Huimin Qi
Keyword(s):  
Ir Spectroscopy ◽  
Flexural Modulus ◽  
Cyanate Ester ◽  
Curing Temperature ◽  
Polymerization Reaction ◽  
Polymerization Temperature ◽  
Cyanate Ester Resin ◽  
Short Period ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

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.

Cyanate ester resin modified by hydroxyl-terminated polybutadiene: Morphology, thermal, and mechanical properties

2011 ◽  
Vol 51 (7) ◽  
pp. 1404-1408 ◽  
Author(s):  
Jing Liu ◽  
Naidong Ding ◽  
Renfu Xu ◽  
Qihui He ◽  
Jian Shen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cyanate Ester ◽  
Thermal And Mechanical Properties ◽  
Cyanate Ester Resin

scholarly journals Influence of curing temperature and stress conditions on mechanical properties of cementing paste backfill

2016 ◽  
Vol 53 (1) ◽  
pp. 148-161 ◽  
Author(s):  
Megan L. Walske ◽  
Heather McWilliam ◽  
James Doherty ◽  
Andy Fourie
Keyword(s):  
Mechanical Properties ◽  
Effective Stress ◽  
Elevated Temperatures ◽  
Small Strain ◽  
Curing Temperature ◽  
Temperature Conditions ◽  
In Situ Conditions ◽  
Paste Backfill ◽  
Temperature Controlled

Cemented paste backfill (CPB) has been observed to achieve greater cemented strength when cured in situ compared with equivalent mixes cured and tested in a laboratory environment. This is in part due to the development of effective stress and generation of elevated temperatures by exothermic cement hydration reactions occurring during curing in a typical underground stope environment. This differs from curing in typical laboratory environments, where little or no effective stresses are generated and curing occurs under constant-temperature conditions. This paper outlines the development, calibration, and testing of a temperature-controlled hydration cell that provides closer representation of in situ conditions by controlling the rate and final amount of specimen temperature increase, in addition to curing under effective stress. The temperature-controlled hydration cell was used to examine the effect of curing under combined effective stress and temperature conditions on the development of small-strain stiffness over a 7 day curing period and the unconfined compressive strength at the end of this period. Curing with both elevated temperature and effective stress was found to significantly increase the mechanical properties of CPB compared with curing at elevated effective stress or ambient temperatures alone.

scholarly journals Improved Mechanical, Anti-UV Irradiation, and Imparted Luminescence Properties of Cyanate Ester Resin/Unzipped Multiwalled Carbon Nanotubes/Europium Nanocomposites

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4244
Author(s):  
Na Yang ◽  
Xiaohua Qi ◽  
Di Yang ◽  
Mengyao Chen ◽  
Yao Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Quantum Information ◽  
Functional Properties ◽  
Cyanate Ester ◽  
Curing Process ◽  
Multiwalled Carbon ◽  
Luminescence Signal ◽  
Cyanate Ester Resin ◽  
Wide Range ◽  
Thermal Stable

Cyanate ester resin (CER) is an excellent thermal stable polymer. However, its mechanical properties are not appropriate for its application, with brittle weakness, and it has poor functional properties, such as luminescence. This work innovatively combines the luminescence property and the improved mechanical properties with the inherent thermal property of cyanate ester. A novel nanocomposite, CER/uMWCNTs/Eu, with multi-functional properties, has been prepared. The results show that with the addition of 0.1 wt.% of uMWCNTs to the resin, the flexural strength and tensile strength increased 59.3% and 49.3%, respectively. As the curing process of the CER progresses, the injected luminescence signal becomes luminescence behind the visible (FBV). The luminescence intensity of CER/uMWCNTs/Eu was much stronger than that of CER/MWCNTs/Eu, and the luminescence lifetime of CER/MWCNTs/Eu and CER/uMWCNTs/Eu was 8.61 μs and 186.39 μs, respectively. FBV exhibited great potential in the embedment of photon quantum information. Therefore, it can be predicted that CER/uMWCNTs/Eu composites will not only have a wide range of applications in sensing, detection, and other aspects, but will also exhibit great potential in the embedding of photon quantum information.

Enhanced dielectric and mechanical properties of epoxy-cyanate ester resin by Al2O3 and OMMT

2020 ◽  
Vol 31 (11) ◽  
pp. 8536-8545
Author(s):  
Zhiguo Li ◽  
Yufei Chen ◽  
Yulong Liu ◽  
Chengjun Teng ◽  
Simin Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cyanate Ester ◽  
Cyanate Ester Resin ◽  
Dielectric And Mechanical Properties
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