Preparation and Properties of Epoxy Resin Coating Layer Modified by Hydroxyl-terminated Epoxidized Polybutadiene/Montmorillonite

XIAO Ran,CONG Ri-min,DING Zheng-mao,LUO Yun-jun

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Chinese Journal of Explosives & Propellants ›› 2021, Vol. 44 ›› Issue (3) : 349-355. DOI: 10.14077/j.issn.1007-7812.202104019

Preparation and Properties of Epoxy Resin Coating Layer Modified by Hydroxyl-terminated Epoxidized Polybutadiene/Montmorillonite

  • XIAO Ran1,2,CONG Ri-min1,2,DING Zheng-mao1,2,LUO Yun-jun1,2
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Abstract

In order to toughen the epoxy resin(EP)coating layer, the organic montmorillonite(OMMT)was peeled off with epoxy butylated hydroxyl(EHTPB)to make EHTPB/OMMT nanocomposite toughener and introduce it into the epoxy resin system. Through Fourier transform infrared spectroscopy(FTIR), low-field nuclear magnetic(LF-NMR), scanning electron microscopy(SEM), static mechanical performance testing, etc., the structure, toughening mechanism and mechanical properties of the modified epoxy resin coating layer were studied. The ablation resistance and bonding performance of the sample with mass ratio of OMMT and EP of 0.2:100 were tested. The results show that when the mass ratio of OMMT and EP is 0.2:100, the elastic modulus of EHTPB/OMMT/EP coating layer decreases by 184.61% compared with that of the referenced sample, while the elongation is increased by 287.55%. The linear ablation rate is 0.155mm/s and the bonding strength is 3.84MPa.It is mainly due to the fact that EHTPB introduces a large number of rubber flexible molecular chains into the epoxy resin matrix, and the OMMT sheet structure can effectively transfer stress, so that the system can absorb more fracture energy and effectively hinder the propagation of microcracks; In addition, OMMT and EP and EHTPB molecular chains form a cross-linked network through hydrogen bonds, which improves toughness.

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material science / hydroxy-terminated epoxidized polybutadiene / montmorillonite / epoxy resin / toughening modification

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XIAO Ran,CONG Ri-min,DING Zheng-mao,LUO Yun-jun. Preparation and Properties of Epoxy Resin Coating Layer Modified by Hydroxyl-terminated Epoxidized Polybutadiene/Montmorillonite. Chinese Journal of Explosives & Propellants. 2021, 44(3): 349-355 https://doi.org/10.14077/j.issn.1007-7812.202104019

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