目的 研究单体配方配比调整对丙烯酸酯胶黏剂热稳定性与黏度等关键性能的影响规律,为制备高性能产品提供理论依据。方法 以丙烯酸异辛酯（2-EHA）、丙烯酸（AA）、甲基丙烯酸酸羟乙酯（HEMA）、丙烯酰胺（AM）和甲基丙烯酸甲酯（MMA）为原料,偶氮二异丁腈（AIBN）为引发剂合成丙烯酸酯胶黏剂,并使用UV灯固化成膜。结果 成功制备出淡黄色透明状胶黏剂,固含率稳定在70%左右。根据红外光谱图分析出聚合物成功聚合,并研究得出相应温度和聚合物Mn、Mw之间的关系,计算出PDI说明聚合物结构稳定。HMEA用量的提升有利于提高聚合物热稳定性、黏性,PSA力学性能测试得出当HEMA 质量分数为10% 时其力学性能相对良好,但是当HMEA的用量达到15%时,聚合物黏性太大导致流动性差,故HMEA的用量控制在10%最合适。结论 该研究结果表明,通过针对性的配方设计有效优化了胶黏剂的核心物化性能。热稳定性的提升拓展了其潜在应用温度范围,而黏度的优化则直接改善了施工工艺适应性。本研究为开发适用于高温等苛刻工况的高性能、高固含量丙烯酸酯胶黏剂提供了明确的数据支持与配方指导。
Abstract
The work aims to study the effects of adjusting monomer formulation ratios on key properties such as thermal stability and viscosity of acrylate adhesives, providing a theoretical basis for the preparation of high-performance products. Acrylate adhesives were synthesized with 2-ethylhexyl acrylate (2-EHA), acrylic acid (AA), hydroxyethyl methacrylate (HEMA), acrylamide (AM), and methyl methacrylate (MMA) as raw materials and azobisisobutyronitrile (AIBN) as the initiator, and UV lamps were used to cure the films. Pale yellow transparent adhesives were successfully prepared, with a solid content stabilizing around 70%. Infrared spectroscopy analysis indicated successful polymerization, and the relationship between temperature and polymers Mn and Mw was studied, with the PDI calculated to demonstrate the structural stability of the polymer. Increasing the amount of HEMA was found to improve polymer thermal stability and viscosity. Mechanical performance tests of PSA showed that when HEMA was at 10 wt%, the mechanical properties were relatively good. However, when HEMA reached 15 wt%, the polymer viscosity became too high, leading to poor flowability, so controlling HEMA at 10 wt% was optimal. The study results indicate that targeted formulation design effectively optimizes the core physicochemical properties of the adhesive. The improvement in thermal stability broadens its potential application temperature range, while viscosity optimization directly enhances construction process adaptability. This research provides clear data support and formulation guidance for developing high-performance, high-solid-content acrylate adhesives suitable for high-temperature and other harsh conditions.
关键词
丙烯酸异辛酯 /
胶黏剂 /
甲基丙烯酸酸羟乙酯
Key words
isooctyl acrylate /
adhesive /
hydroxyethyl methacrylate
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基金
国家级大学生创新创业训练计划项目（202510564006S）; 韶关市科技计划项目（873003）; 清远市科技计划项目（2024BQW017）
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