Interface Mechanism and Mechanical Properties of Micron PS Epoxy Resin Toughened Steel-CFRP

Abstract

Abstract: To strengthen the strength and toughness of epoxy resin at the steel-carbon fiber reinforced polymer (CFRP) adhesive interface, polystyrene (PS) microspheres were added to enhance the mechanical properties of epoxy resin. The tensile, bending and impact properties of micron PS toughened epoxy resin under normal temperature curing process were studied. The micromorphology of the tensile cross section of epoxy resin was observed using scanning electron microscope (SEM). The strengthening and toughening mechanism of micron PS particles on epoxy resin was analyzed, and the mechanical property test of the steel-CFRP adhesive interface was carried out. The results show that: the tensile strength, tensile modulus of elasticity, flexural strength, flexural modulus, elongation at break, flexural deflection and impact strength of the adhesives show a tendency to increase and then decrease with the increase of PS dosage when the mass fraction of PS increases from 0% to 5.00%. When the matrix breaks, the PS particles produce large deformations or hinder the development of microcracks, thereby achieving the purpose of toughening. The larger amount of PS particles will adhere and agglomerate in epoxy resin, resulting in a decrease in the mechanical properties of epoxy resin. As the PS content increases from 0% to 2.50%, the failure mode of the steel-CFRP bonded specimens gradually transitions from steel plate debonding and adhesive layer cohesive failure to CFRP plate delamination. The tensile strength of the double-lap specimen gradually increases, and the micron PS toughened epoxy resin with mass fraction of 2.50% shows good mechanical properties in the steel-CFRP adhesive interface.

Key words: polystyrene, toughened epoxy resin, double-lap specimen, mechanical property, microstructure

CLC Number:

TB332

CHEN Zhuoyi, YAN Zizhuo, LIU Yan, PENG Lan. Interface Mechanism and Mechanical Properties of Micron PS Epoxy Resin Toughened Steel-CFRP[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(8): 3098-3108.

References

[1] 李传习, 柯璐, 陈卓异, 等. 正交异性钢桥面板弧形切口及其CFRP补强的疲劳性能[J]. 中国公路学报, 2021, 34(5): 63-75.
LI C X, KE L, CHEN Z Y, et al. Fatigue behavior and CFRP reinforcement of diaphragm cutouts in orthotropic steel bridge decks[J]. China Journal of Highway and Transport, 2021, 34(5): 63-75 (in Chinese).
[2] WANG Y, LI J H, DENG J, et al. Bond behaviour of CFRP/steel strap joints exposed to overloading fatigue and wetting/drying cycles[J]. Engineering Structures, 2018, 172: 1-12.
[3] 王振镭, 李强利, 严初三, 等. 双酚A对环氧树脂固化反应的影响研究[J]. 热固性树脂, 2024, 39(1): 20-24.
WANG Z L, LI Q L, YAN C S, et al. Effect of bisphenol-A on the curing reaction of epoxy resin[J]. Thermosetting Resin, 2024, 39(1): 20-24 (in Chinese).
[4] SZEWCZAK A. Changes in the rheological and adhesive properties of epoxy resin used in the technology of reinforcement of structural elements with CFRP tapes[J]. Materials, 2023, 16(23): 7408.
[5] 荣立平, 王刚, 李志国, 等. SiO₂杂化环氧树脂耐热性能研究[J]. 热固性树脂, 2023, 38(3): 29-33.
RONG L P, WANG G, LI Z G, et al. Study on heat resistance of SiO₂ hybrid epoxy resin[J]. Thermosetting Resin, 2023, 38(3): 29-33 (in Chinese).
[6] KOTEŁKO M, LIS P, MACDONALD M. Load capacity probabilistic sensitivity analysis of thin-walled beams[J]. Thin-Walled Structures, 2017, 115: 142-153.
[7] 元强, 王攒, 姚灏, 等. 活性改性剂合成及其对环氧胶粘剂力学与界面粘接性能影响研究[J/OL]. 材料导报, 2024(11): 1-18 (2023-03-21)[2024-02-07]. http://kns.cnki.net/kcms/detail/50.1078.tb.20230330.1643.037.html.
YUAN Q, WANG Z, YAO H, et al. Synthesis of reactive modifiers and their effects on mechanical and interfacial bonding properties of epoxy adhesives[J/OL]. Materials Reports, 2024(11): 1-18 (2023-03-21)[2024-02-07]. http://kns.cnki.net/kcms/detail/50.1078.tb.20230330.1643.037.html (in Chinese).
[8] 陈卓异, 彭彦泽, 李传习, 等. 高温下双搭接钢-CFRP板胶粘界面力学性能试验[J]. 复合材料学报, 2021, 38(2): 449-460.
CHEN Z Y, PENG Y Z, LI C X, et al. Experimental study for the adhesive interface mechanical properties of double lapped steel-CFRP plate at high temperature[J]. Acta Materiae Compositae Sinica, 2021, 38(2): 449-460 (in Chinese).
[9] 李传习, 李游, 贺君, 等. 固化剂对室温胶黏CFRP板/钢板界面性能的影响[J]. 建筑材料学报, 2021, 24(2): 339-347.
LI C X, LI Y, HE J, et al. Effect of curing agent on interfacial performance of adhesively bonded CFRP laminate/steel plate cured at room temperature[J]. Journal of Building Materials, 2021, 24(2): 339-347 (in Chinese).
[10] 袁智慧, 牛永平, 汪小伟, 等. 环氧树脂增韧机理及研究进展[J]. 热固性树脂, 2019, 34(6): 65-70.
YUAN Z H, NIU Y P, WANG X W, et al. Toughening mechanism and research progress of epoxy resins[J]. Thermosetting Resin, 2019, 34(6): 65-70 (in Chinese).
[11] KUNAL M, RAMAN P S. Effect of APTMS modification on multiwall carbon nanotube reinforced epoxy nanocomposites[J]. Composites Part B, 2019, 162: 425-432.
[12] AL-MOSAWE A, AL-MAHAIDI R, ZHAO X L. Effect of CFRP properties, on the bond characteristics between steel and CFRP laminate under quasi-static loading[J]. Construction and Building Materials, 2015, 98: 489-501.
[13] 陈子豪, 阮英波, 杨杰. 悬浮改性耐高温环氧树脂基复合材料的性能与增韧机制[J]. 材料导报, 2023, 37(增刊2): 572-576.
CHEN Z H, RUAN Y B, YANG J. Properties and toughening mechanism of suspension modified high temperature resistant epoxy resin matrix composites[J]. Materials Reports, 2023, 37(supplement 2): 572-576 (in Chinese).
[14] ZHANG K H, WANG Z J, LUO Y. One-component epoxy resin adhesive featured with high storage stability based on microencapsulation[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2024, 683: 133045.
[15] 李游, 李传习, 郑辉, 等. 固化剂混掺对高温下CFRP板-钢板界面黏结性能的影响[J]. 复合材料学报, 2021, 38(12): 4073-4089.
LI Y, LI C X, ZHENG H, et al. Effect of curing agent mixing on interfacial bond behavior of glued CFRP plate-steel plate at elevated temperature[J]. Acta Materiae Compositae Sinica, 2021, 38(12): 4073-4089 (in Chinese).
[16] SOLEILHET F, QUIERTANT M, BENZARTI K. Numerical modelling of the nonlinear shear creep behavior of FRP-concrete bonded joints[J]. Materials, 2023, 16(2): 801.
[17] 王建杰, 张栩志, 苏延磊. 环氧树脂增韧改性的研究[J]. 热固性树脂, 2020, 35(2): 55-59.
WANG J J, ZHANG X Z, SU Y L. Study on the toughening modification of epoxy resin[J]. Thermosetting Resin, 2020, 35(2): 55-59 (in Chinese).
[18] KORAYEM H A, LI Y C, ZHANG H Q, et al. Effect of carbon nanotube modified epoxy adhesive on CFRP-to-steel interface[J]. Composites Part B, 2015, 79: 95-104.
[19] OMRANI A, SIMON L C, ROSTAMI A A. The effects of alumina nanoparticle on the properties of an epoxy resin system[J]. Materials Chemistry and Physics, 2009, 114(1): 145-150.
[20] SERIN H, YILDIZHAN Ş. Tensile properties and cost-property efficiency analyses of expanded polystyrene/chopped glass fiber/epoxy novel composite[J]. Journal of Mechanical Science and Technology, 2021, 35(1): 145-151.
[21] 胡智枫, 段华军, 唐玉山, 等. 端环氧基聚苯乙烯低聚物增韧改性环氧树脂[J]. 热固性树脂, 2016, 31(6): 49-53.
HU Z F, DUAN H J, TANG Y S, et al. Study on the epoxy-terminated polystyrene oligomer toughening epoxy resin[J]. Thermosetting Resin, 2016, 31(6): 49-53 (in Chinese).
[22] 李璇蕊, 郑婷, 王晓东, 等. 热塑性树脂增韧环氧树脂复合材料研究进展[J]. 哈尔滨工程大学学报, 2024, 45(4): 808-818.
LI X R, ZHENG T, WANG X D, et al. Research progress on epoxy resin composites toughened by thermoplastic resin[J]. Journal of Harbin Engineering University, 2024, 45(4): 808-818 (in Chinese).
[23] ROSTAMIYAN Y, HAMED MASHHADZADEH A, SALMANKHANI A. Optimization of mechanical properties of epoxy-based hybrid nanocomposite: effect of using nano silica and high-impact polystyrene by mixture design approach[J]. Materials and Design, 2013, 56: 1068-1077.
[24] MIRMOHSENI A, ZAVAREH S. Modeling and optimization of a new impact-toughened epoxy nanocomposite using response surface methodology[J]. Journal of Polymer Research, 2011, 18(4): 509-517.
[25] 马奇利, 张翠霞, 王晗, 等. 温度对碳纳米管纤维/环氧树脂界面剪切强度的影响[J]. 上海大学学报(自然科学版), 2018, 24(6): 961-967.
MA Q L, ZHANG C X, WANG H, et al. Temperature effect on interfacial shear strength of carbon nanotube fiber/epoxy resin composites[J]. Journal of Shanghai University (Natural Science Edition), 2018, 24(6): 961-967 (in Chinese).
[26] SUN T, WU Z J, ZHUO Q, et al. Microstructure and mechanical properties of aminated polystyrene spheres/epoxy polymer blends[J]. Composites Part A: Applied Science and Manufacturing, 2014, 66: 58-64.
[27] SHA Y, HUI C Y, KRAMER E J, et al. Fracture toughness and failure mechanisms of epoxy/rubber-modified polystyrene (HIPS) interfaces reinforced by grafted chains[J]. Macromolecules, 1996, 29(13): 4728-4736.
[28] GU H B, MA C, LIANG C B, et al. A low loading of grafted thermoplastic polystyrene strengthens and toughens transparent epoxy composites[J]. Journal of Materials Chemistry C, 2017, 5(17): 4275-4285.
[29] AMARO A, BERNARDO L, PINTO D, et al. The influence of curing agents in the impact properties of epoxy resin nanocomposites[J]. Composite Structures, 2017, 174(8): 26-32.
[30] 顾晓燕, 高剑飞, 李惠翔. 聚酯纤维用于环氧树脂沥青混合料增柔及增韧技术研究[J]. 中外公路, 2022, 42(3): 247-250.
GU X Y, GAO J F, LI H X. Study on technology of toughening and toughening of epoxy resin asphalt mixture with polyester fiber[J]. Journal of China & Foreign Highway, 2022, 42(3): 247-250 (in Chinese).
[31] 张冲标, 高博, 李运钱, 等. 玻纤增强环氧树脂力学与耐老化性能研究[J]. 浙江工业大学学报, 2024, 52(1): 100-104.
ZHANG C B, GAO B, LI Y Q, et al. Study on mechanical and aging-resistant properties of glass fiber reinforced epoxy resin[J]. Journal of Zhejiang University of Technology, 2024, 52(1): 100-104 (in Chinese).