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用聚乙二醇(PEG)在催化剂过硫酸钾作用下与环氧树脂反应,制得自乳化环氧树脂乳液。通过红外光谱表征改性环氧的结构,并比较不同实验方案下乳液的稳定性,探讨了反应原料、合成工艺等因素对实验结果的影响,确定了最佳实验方案;用热分析实验表征上浆剂的热稳定性,接触角测试表征上浆剂乳液的浸润性,单丝碎裂实验测定界面剪切强度。结果表明,使用双酚A环氧树脂及PEG1000在80～120℃反应制得的乳液稳定性最好,上浆剂的热稳定性和浸润性良好。用实验制得的乳液对碳纤维上浆,单丝界面剪切强度比上浆前提高33.48%,碳纤维毛丝量减少。
With polyethylene glycol (PEG) in the role of potassium persulfate catalyst with the epoxy resin reaction, prepared from emulsified epoxy resin emulsion. The structure of modified epoxy was characterized by FTIR, and the stability of the emulsion under different experimental conditions was compared. The effects of reaction materials, synthesis process and other factors on the experimental results were discussed, and the best experimental scheme was determined. The thermal stability of the agent, the contact angle test characterizes the wettability of the sizing emulsion and the determination of interfacial shear strength by the monofilament shattering test. The results showed that the emulsion prepared by the reaction of bisphenol A epoxy resin and PEG1000 at 80-120 ℃ had the best stability and the sizing agent had good thermal stability and wettability. Sizing the carbon fiber with the emulsion prepared in the experiment, the interfacial shear strength of the monofilament is increased by 33.48% compared with that before sizing, and the amount of the carbon fiber yarn is reduced.