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本文以α、ω-二氨丙基封端的聚二甲基硅氧烷、甲苯二异氰酸酯、甲基两烯酸羟乙酯为原料,合成了甲基丙烯酸酯封端的聚二甲基硅氧烷聚氨酯。并以此作为反应性低聚物,以甲基丙烯酸羟乙酯为亲水性反应稀释剂,通过紫外光固化,合成了一系列聚硅氧烷含量不同的共聚网络。应用红外光谱、凝胶含量测定、热分析、动态力学性能、吸水性实验等方法,对它们的固化程度、亲水疏水性能进行了研究。结果表明:体系中存在着两相结构,增加稀释剂的含量,材料的吸水性增加。通过调节疏水性的聚二甲基硅氧烷和亲水性的甲基丙烯酸羟乙酯的含量可改变体系的亲水疏水平衡。
In this paper, α, ω-diaminopropyl-terminated polydimethylsiloxane, toluene diisocyanate and hydroxyethyl methacrylate were used as raw materials to synthesize methacrylate terminated polydimethylsiloxane Polyurethane. And as a reactive oligomer, hydroxyethyl methacrylate as a hydrophilic reactive diluent, by UV curing, a series of polysiloxane different content of the copolymer network was synthesized. The curing degree, hydrophilicity and hydrophobicity were studied by IR, gel content, thermal analysis, dynamic mechanical properties and water absorption. The results show that there is a two-phase structure in the system, increasing the content of diluent and increasing the water absorption of the material. By adjusting the content of hydrophobic polydimethylsiloxane and hydrophilic hydroxyethyl methacrylate, the hydrophilic and hydrophobic balance of the system can be changed.