Morphological, mechanical and thermal properties of cyanate ester/benzoxazine resin composites reinforced by silane treated natural hemp fibers

doi:10.1016/j.cjche.2018.01.008

Abstract

Abstract: This present study deals with the reinforcement of thermosetting resin blends composed of cyanate ester (CE) and benzoxazine (BOZ) resins with natural hemp fibers (NHFs). These NHFs were initially treated by using a silane coupling agent (SCA) in order to chiefly enhance their distributions as well as adhesions within the CE/BOZ resin matrix, then incorporated with various weight amounts ranging from 5 wt% to 20 wt% with a regular interval of 5 wt%. The obtained results showed that at the maximum treated fiber loading (20 wt%), distinctive enhancements in the mechanical properties in terms of flexural strength and microhardness were obtained. Besides, the thermal stability and glass transition temperature (T_g) were appreciably enhanced and were higher than those of the pure CE/BOZ resin properties. With respect to the astonishing properties of the NHFs, these enhancements could be possibly due to the good dispersion and adhesion of the treated NHFs inside the CE/BOZ resin achieved upon using the SCA. Therefore, we believe herein that these renewable and cheap NHFs have considerable potential to be used as reinfocer materials for CE/BOZ resin composites to be used in various industrial sectors.

Key words: Cyanate ester, Benzoxazine, Hemp fibers, Thermal stabilities, Mechanical properties

Abdeldjalil Zegaoui, Ruikun Ma, Abdul Qadeer Dayo, Mehdi Derradji, Jun Wang, Wenben Liu, Yile Xu, Wan'an Cai. Morphological, mechanical and thermal properties of cyanate ester/benzoxazine resin composites reinforced by silane treated natural hemp fibers[J]. Chin.J.Chem.Eng., 2018, 26(5): 1219-1228.

References

[1] I. Hamerton, High-performance thermoset-thermoset polymer blends:A review of the chemistry of cyanate-bismaleimide blends, High Perform. Polym. 8(1996) 83-95.

[2] X. Li, X. Luo, Y. Gu, A novel benzoxazine/cyanate ester blend with sea-island phase structures, Phys. Chem. Chem. Phys. 17(2015) 19255-19260.

[3] H. Kimura, K. Ohtsuka, A. Matsumoto, Curing reaction of bisphenol-A based benzoxazine with cyanate ester resin and the properties of the cured thermosetting resin, Express Polym. Lett. 5(2011) 1113-1122.

[4] X. Li, Y. Gu, The co-curing process of a benzoxazine-cyanate system and the thermal properties of the copolymers, Polym. Chem. 2(2011) 2778.

[5] K.S. Santhosh Kumar, C.P. Reghunadhan Nair, K.N. Ninan, Investigations on the cure chemistry and polymer properties of benzoxazine-cyanate ester blends, Eur. Polym. J. 45(2009) 494-502.

[6] C.H. Lin, S.J. Huang, P.J. Wang, H.T. Lin, S.A. Dai, Miscibility, microstructure, and thermal and dielectric properties of reactive blends of dicyanate ester and diaminebased benzoxazine, Macromolecules 45(2012) 7461-7466.

[7] A. Zegaoui, A. Wang, A. Qadeer, B. Tian, W. Liu, J. Wang, L. Yu-guang, Effects of gamma irradiation on the mechanical and thermal properties of cyanate ester/benzoxazine resin, Radiat. Phys. Chem. 141(2017) 110-117.

[8] X. Li, X. Luo, M. Liu, Q. Ran, Y. Gu, The catalytic mechanism of benzoxazine to the polymerization of cyanate ester, Mater. Chem. Phys. 148(2014) 328-334.

[9] H. Yan, T. Li, M. Zhang, S. Feng, Mechanical and dielectric properties of blends of dicyanate ester and bisphenol A-based benzoxazine, High Perform. Polym. 26(2014) 618-624.

[10] G. Wu, Y. Cheng, K. Wang, Y. Wang, A. Feng, Fabrication and characterization of OMMt/BMI/CE composites with low dielectric properties and high thermal stability for electronic packaging, J. Mater. Sci. Mater. Electron. 27(2016) 5592-5599.

[11] X. Zou, X. Yang, M. Xu, K. Jia, X. Liu, Curing behaviors and properties of allyl-and benzoxazine-functional phthalonitrile with improved processability, J. Polym. Res. 23(2016) 1-9.

[12] Y. Wang, G. Wu, K. Kou, C. Pan, A. Feng, Mechanical, thermal conductive and dielectrical properties of organic montmorillonite reinforced benzoxazine/cyanate ester copolymer for electronic packaging, J. Mater. Sci. Mater. Electron. 27(2016) 8279-8287.

[13] G. Wu, J. Li, K. Wang, Y. Wang, C. Pan, A. Feng, In situ synthesis and preparation of TiO₂ polyimide composite containing phenolphthalein functional group, J. Mater. Sci. Mater. Electron. 28(2017) 6544-6551.

[14] H.N. Dhakal, Z.Y. Zhang, M.O.W. Richardson, Effect of water absorption on the mechanical properties of hemp fibre reinforced unsaturated polyester composites, Compos. Sci. Technol. 67(2007) 1674-1683.

[15] R. Hu, J.-K. Lim, Fabrication and mechanical properties of completely biodegradable hemp fiber reinforced polylactic acid composites, J. Compos. Mater. 41(2007) 1655-1669.

[16] Y.K. Dasan, A.H. Bhat, F. Ahmad, Polymer blend of PLA/PHBV based bionanocomposites reinforced with nanocrystalline cellulose for potential application as packaging material, Carbohydr. Polym. 157(2017) 1323-1332.

[17] M.A. Sawpan, K.L. Pickering, A. Fernyhough, Effect of fibre treatments on interfacial shear strength of hemp fibre reinforced polylactide and unsaturated polyester composites, Compos. Part A Appl. Sci. Manuf. 42(2011) 1189-1196.

[18] S. Oza, Thermal stability and thermo-mechanical properties of hemp-high density polyethylene composites:Effect of two different chemical modifications, Compos. Part B 44(2013) 484-490.

[19] A. Fotouh, J.D. Wolodko, M.G. Lipsett, Uniaxial tensile behaviour modelling of natural-fiber-reinforced viscoplastic polymer using normalized stress-strain curves, J. Compos. Mater. 49(2015) 2389-2402.

[20] S. Panthapulakkal, M. Sain, Studies on the water absorption properties of short hemp-glass fiber hybrid polypropylene composites, J. Compos. Mater. 41(2007) 1871-1883.

[21] D.M. Panaitescu, C.A. Nicolae, Z. Vuluga, C. Vitelaru, C.G. Sanporean, C. Zaharia, D. Florea, G. Vasilievici, Influence of hemp fibers with modified surface on polypropylene composites, J. Ind. Eng. Chem. 37(2016) 137-146.

[22] G. Francucci, N. Manthey, F. Cardona, T. Aravinthan, Processing and characterization of 100% hemp-based biocomposites obtained by vacuum infusion, J. Compos. Mater. 48(2013) 1323-1335.

[23] A.Q. Dayo, Y.-L. Xu, A. Zegaoui, A.A. Nizamani, J. Wang, L. Zhang, W.-B. Liu, A.H. Shah, Reinforcement of waste hemp fibres in aromatic diamine-based benzoxazine thermosets for the enhancement of mechanical and thermomechanical properties, Plast. Rubber Compos. 46(2017) 442-449.

[24] A.Q. Dayo, B. Chang Gao, J. Wang, W. Bin Liu, M. Derradji, A.H. Shah, A.A. Babar, Natural hemp fiber reinforced polybenzoxazine composites:Curing behavior, mechanical and thermal properties, Compos. Sci. Technol. 144(2017) 114-124.

[25] Y. Xu, A.Q. Dayo, J. Wang, A. Wang, D. Lv, A. Zegaoui, M. Derradji, W. Liu, Mechanical and thermal properties of a room temperature curing epoxy resin and related hemp fi bers reinforced composites using a novel in-situ generated curing agent, Mater. Chem. Phys. 203(2018) 293-301.

[26] R. Joffe, B. Madsen, K. Nattinen, A. Miettinen, Strength of cellulosic fiber/starch acetate composites with variable fiber and plasticizer content, J. Compos. Mater. 49(2014) 1007-1017.

[27] P.J. Jandas, S. Mohanty, S.K. Nayak, Renewable resource-based biocomposites of various surface treated banana fiber and poly lactic acid:Characterization and biodegradability, J. Polym. Environ. 20(2012) 583-595.

[28] A.K. Balan, S. Mottakkunnu Parambil, S. Vakyath, J. Thulissery Velayudhan, S. Naduparambath, P. Etathil, Coconut shell powder reinforced thermoplastic polyurethane/natural rubber blend-composites:Effect of silane coupling agents on the mechanical and thermal properties of the composites, J. Mater. Sci. 52(2017) 6712-6725.

[29] X. Li, L.G. Tabil, S. Panigrahi, Chemical treatments of natural fiber for use in natural fiber-reinforced composites:A review, J. Polym. Environ. 15(2007) 25-33.

[30] R. Sepe, F. Bollino, L. Boccarusso, F. Caputo, Influence of chemical treatments on mechanical properties of hemp fiber reinforced composites, Compos. Part B 133(2018) 210-217.

[31] Y. Jia, H. Yan, L. Ma, J.-P. Zhang, Improved mechanical and tribological properties of benzoxazine-bismaleimides resin by surface-functionalized carbon nanotubes, J. Polym. Res. 21(2014) 499.

[32] H.X. Yan, Y. Jia, M.L. Li, T.T. Li, The tribological properties of benzoxazinebismaleimides composites with functionalized nano-SiO₂, J. Appl. Polym. Sci. 129(2013) 3150-3155(d).

[33] B.F. Yousif, A. Shalwan, C.W. Chin, K.C. Ming, Flexural properties of treated and untreated kenaf/epoxy composites, Mater. Des. 40(2012) 378-385.

[34] N.C. Loureiro, J.L. Esteves, J.C. Viana, S. Ghosh, Development of polyhydroxyalkanoates/poly (lactic acid) composites reinforced with cellulosic fibers, Compos. Part B Eng. 60(2014) 603-611.

[35] D. Shanmugam, M. Thiruchitrambalam, Static and dynamic mechanical properties of alkali treated unidirectional continuous Palmyra Palm Leaf Stalk Fiber/jute fiber reinforced hybrid polyester composites, Mater. Des. 50(2013) 533-542.

[36] S. Tragoonwichian, N. Yanumet, H. Ishida, A study on sisal fiber-reinforced benzoxazine/epoxy copolymer based on diamine-based benzoxazine, Compos. Interfaces 15(2008) 321-334.

[37] L.A. Pothan, Z. Oommen, S. Thomas, Dynamic mechanical analysis of banana fiber reinforced polyester composites, Compos. Sci. Technol. 63(2003) 283-293.