Enhanced thermal stabilities and char yields of carbon fibers reinforced boron containing novolac phenolic resins composites
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4-hydroxymethyl phenylboronic acid (4-HMPBA), phenol and formaldehyde were for the first time to synthesize boron containing novolac phenolic resins (Novolac-4-HMPBA). Its corresponding carbon fibers (CF) composites were also fabricated via the lamination followed by hot-compression. Results revealed that Novolac-4-HMPBA was successfully synthesized. Compared to common novolac phenolic resin (NPR), the corresponding decomposition temperature of 5% weight loss (T 5 ) and char yield at 800 °C (C 800 ) of cured Novolac-4-HMPBA-30 were increased to 369.1 °C and 69.7%, increased by 41.3% and 26.3%, respectively. The CF/Novolac-4-HMPBA-20 composites presented relatively higher interlaminar shear strength (ILSS) of 35.9 MPa, increased by 50.2% compared to that of CF/NPR composites. After the treatment at 800 °C for one hour under Ar atmosphere, the corresponding ILSS value of CF/Novolac-4-HMPBA-20 composite was decreased to 7.8 MPa, but still higher than that of CF/NPR composites (3.0 MPa).
KeywordsNovolac phenolic resins 4-hydroxymethyl phenylboronic acid Thermal stabilities Interlaminar shear strength
The authors are grateful for the support and funding provided by the Foundation of National Natural Science Foundation of China (Nos. 51773169 and 51403175); Space Supporting Fund from China Aerospace Science and Industry Corporation (No. 2017-HT-XG) and the Fundamental Research Funds for the Central Universities (No. 3102017jg02003).
- 1.Triantou KI, Mergia K, Perez B, Florez S, Stefan A, Ban C, Pelin G, Ionescuc G, Zuber C, Fischer WPP, Barcena J (2017) Thermal shock performance of carbon-bonded carbon fiber composite and ceramic matrix composite joints for thermal protection re-entry applications. Compos Part B 111:270CrossRefGoogle Scholar
- 14.Balc S, Sezgi NA, Eren E (2012) Boron oxide production kinetics using boric acid as raw material. Ind Eng Chem Res 51:312Google Scholar
- 25.Malkowsky IM, Fröhlich R, Griesbach U, Pütterand H, Waldvogel SR (2006) Facile and reliable synthesis of tetraphenoxyborates and their properties. Eur J Inorg Chem 2006:1690Google Scholar
- 28.Artmann A, Bianchi O, Soares MR (2010) Nunes, R.C.R.Rheokinetic investigations on the thermal cure of phenol-formaldehyde novolac resins. Mater Sci Eng, C 30: 1245Google Scholar
- 32.HQ W, Wei Q, He H, Yang BF, Zhang Q, Yang GY (2014) A new acentric metalborate Mg[B6O9(OH)2]·4H2O: synthesis, structure and optical property. Inorg. Chem Commun 46:69Google Scholar
- 35.Shapiro PJ, Jiang FL, Jin XP, Twamley B, Patton JT, Rheingold AL (2004) Zwitterionic phosphorus ylide adducts of boron-bridged ansa-zirconocene complexes as precatalysts for olefin polymerization. Eur J Inorg Chem 2004:3370. https://doi.org/10.1002/ejic.200300932
- 37.Masahiro N, Tada-aki Y, Yoshiaki N (2006) Determination of branch density for high-ortho novolac and random novolac using 13C-NMR. J Netw Polym 27:210Google Scholar
- 40.Ardelean I, Păşcuţă P (2004) Comparative vibrational study of xFe2O3·(1-x)[3B2O3·MO] (MO⇒CaO or CaF2) glass systems. Met Powder Rep 58:3499Google Scholar
- 44.Liu CL, Guo QG, Shi JL, Liu L (2004) Microstructure evolution in preparation of carbon fibers from phenolic resin. New Carbon Mater 19:124Google Scholar