潘巍,李瑜,辛颉,孙昭宜,王国荣,王清鑫.一种低吸水率聚硫橡胶改性环氧树脂重防腐基体的制备[J].表面技术,2022,51(4):227-235.
PAN Wei,LI Yu,XIN Jie,SUN Zhao-yi,WANG Guo-rong,WANG Qing-xin.Preparation of a Low Water Absorption Polysulfide Rubber Modified Epoxy Heavy-duty Coating Substrate[J].Surface Technology,2022,51(4):227-235 |
| 一种低吸水率聚硫橡胶改性环氧树脂重防腐基体的制备 |
| Preparation of a Low Water Absorption Polysulfide Rubber Modified Epoxy Heavy-duty Coating Substrate |
| 投稿时间：2021-02-24 修订日期：2021-07-26 |
| DOI：10.16490/j.cnki.issn.1001-3660.2022.04.023 |
| 中文关键词: 吸水性 组合胺 环氧树脂 聚硫橡胶 防腐涂料 |
| 英文关键词:absorbent combined amine epoxy polysulfide rubber anticorrosive coating |
| 基金项目: |
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| Author | Institution |
| PAN Wei | Basic Department,, Wuhan 430033, China |
| LI Yu | Basic Department,, Wuhan 430033, China |
| XIN Jie | Basic Department,, Wuhan 430033, China |
| SUN Zhao-yi | Basic Department,, Wuhan 430033, China;School of Naval Architecture and Marine Engineering, Naval University of Engineering, Wuhan 430033, China |
| WANG Guo-rong | Basic Department,, Wuhan 430033, China;School of Naval Architecture and Marine Engineering, Naval University of Engineering, Wuhan 430033, China |
| WANG Qing-xin | Basic Department,, Wuhan 430033, China |
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| 中文摘要: |
| 目的 为提高防腐涂层基体的力学性能，研制了一种适用于防腐基体的组合胺固化剂，同时为降低基体吸水率以满足重防腐的要求，改进了聚硫橡胶对环氧树脂的改性方法。方法 对不同固化产物进行力学性能测试以遴选力学性能最佳的组合胺固化剂。分别对采用常规改性方法和改进后的改性方法制备的基体进行动态热机械分析(DMA)、凝胶渗透色谱(GPC)分析，并分别利用金相显微镜和扫描电镜(SEM)观察其表面形貌和截面形貌，同时利用电化学阻抗谱(EIS)技术探究改进后的改性方法和常规改性方法对聚硫改性环氧涂层基体防腐性能的影响。结果 采用聚醚胺D230/氨乙基哌嗪AEP组合胺固化剂的固化产物的拉伸强度可达到19.47 MPa，剪切、正拉黏结强度分别可达到18.02、22.09 MPa，与钢材的黏结强度随D230含量的递增而增加，当固化剂中D230的质量分数为84%时，黏结强度最大。改进后的改性方法制备的基体饱和吸水率仅为1.7%。50 μm厚的涂层在3.5% NaCl溶液中浸泡7 d，|Z|0.1 Hz值依然接近108 Ω/cm2，防腐性能优异。结论 采用D230/ AEP组合胺固化剂的固化产物的力学性能最佳，且D230/AEP组合胺固化剂在固化过程中对固化产物微观结构的影响较小，固化产物的拉伸强度等力学性能受固化剂含量的影响较小。与常规方法相比，改进后的改性方法制备的基体的耐水性、力学性能和防腐性能均有较大幅度提高。最终制备出的聚合物基体具有较低的吸水率、良好的力学性能和优异的防腐性能，可适用于重防腐领域。 |
| 英文摘要: |
| To improve the mechanical properties of anti-corrosion coating substrate, a combined amine curing agent suitable for anti-corrosion substrate is developed; meanwhile, to reduce the water absorption of the substrate to meet the requirements of heavy-duty, the modification method of epoxy resin by polysulfide rubber is improved. The mechanical properties of different curing products were tested to select the best combination amine curing agent; Dynamic mechanical analysis (DMA) and gel permeation chromatography (GPC) were applied to the matrix prepared by conventional modification method and improved modified method respectively. The surface morphology and section morphology were observed by means of metallographic microscope and scanning electron microscope (SEM). At the same time, electrochemical impedance spectroscopy (EIS) technology was used to explore the influence of the improved modification method and conventional modification method on the anti-corrosion performance of polysulfide modified epoxy coating. The results showed that the tensile strength of the curing product with D230 and AEP could reach 19.47 MPa, and the shear and tensile bond strengths could reach 18.02 MPa and 22.09 MPa respectively. The bonding strength with steel increases with the increase of D230 content, when the mass fraction of D230 in the curing agent was 84%, the adhesive strength was the highest. The saturated water absorption of the substrate prepared by the improved modification method was only 1.7%. The |Z|0.1 Hz value of the coating with a thickness of 50μm was still close to 108 Ω/cm2 after soaking in 3.5% NaCl solution for 7 days, which showed that the coating has excellent corrosion resistance. The mechanical properties of the curing products with curing agent D230 and AEP are the best, and the curing agents of D230 and AEP have little influence on the microstructure of the curing products, and the mechanical properties such as tensile strength of the cured products are less affected by the content of curing agent; Compared with the conventional method, the water resistance, mechanical properties and corrosion resistance of the matrix prepared by the improved modified method are greatly improved. The final polymer matrix is suitable for heavy-duty protection because of its low water absorption, good mechanical properties and excellent corrosion resistance. |
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