Moisture absorption and mechanical properties for high-modulus Pitch 75 graphite-fiber-modified cyanate ester resin laminates

Author(s):  
Christopher Blair ◽  
Jerry Zakrzewski
2011 ◽  
Vol 51 (7) ◽  
pp. 1404-1408 ◽  
Author(s):  
Jing Liu ◽  
Naidong Ding ◽  
Renfu Xu ◽  
Qihui He ◽  
Jian Shen ◽  
...  

2018 ◽  
Vol 31 (6) ◽  
pp. 623-630 ◽  
Author(s):  
Yiqun Wang ◽  
Shiyi Zhou ◽  
Haiying Du ◽  
Wentao Zhang

Fibre-reinforced polymer (FRP) composites with thermosetting resin matrices are widely used in civil engineering (e.g. pultruded FRP plates and bars), and their thermal ageing behaviour is a concern when they are subjected to elevated temperatures (e.g. FRP chimney). In the present article, the effects of thermal ageing at 200°C and 250°C in air for up to 1000 h on mechanical properties and mechanism of the benzoxazine (Boz), bisphenol A dicyanate cyanate ester (BADCy), and 4,4′-bismaleimidodiphenyl methane (BMI) have been investigated. The effect of time in thermal ageing on structural and mechanical properties of the Boz/BMI/BADCy resin was deeply studied. The moisture absorption increases linearly with the square root of ageing time and it follows Fick’s second law. There are two main categories of reactions in thermal ageing: the first one is the post-curing process, which leads to a larger crosslinking density and a reduced interior stress; while the other is the formation of microcracks and thermal oxidation at the surface of the Boz/BMI/BADCy resin. The combination of the above factors leads to an increase–decrease variation in the mechanical properties. This work is believed to benefit the wide and safe application of a certain Boz/BMI/BADCy resin system in engineering application.


2006 ◽  
Vol 27 (4) ◽  
pp. 402-409 ◽  
Author(s):  
Penggang Ren ◽  
Guozheng Liang ◽  
Zengping Zhang

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4244
Author(s):  
Na Yang ◽  
Xiaohua Qi ◽  
Di Yang ◽  
Mengyao Chen ◽  
Yao Wang ◽  
...  

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.


2020 ◽  
Vol 31 (11) ◽  
pp. 8536-8545
Author(s):  
Zhiguo Li ◽  
Yufei Chen ◽  
Yulong Liu ◽  
Chengjun Teng ◽  
Simin Chen ◽  
...  

2012 ◽  
Vol 532-533 ◽  
pp. 361-364
Author(s):  
Zeng Ping Zhang ◽  
Jian Zhong Pei ◽  
Chang Qing Fang ◽  
Shuan Fa Chen

Different contents of epoxy functionalized polyhedral oligomeric silsesquioxane (POSS-Ep) were used to modify cyanate ester resin. The dynamic mechanical properties of the hybrids were studied dynamic mechanical analysis (DMA). DMA results showed that POSS-Ep tended to decrease E’ of the hybrids at the glassy state but to increase E’ of the hybrids at the rubbery state.


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