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以不同分子量的聚乙二醇(PEG)和聚四氢呋喃醚二元醇(PTMG)与甲苯2,4二异氰酸酯(TDI)、丙烯酸羟乙酯(HEA)反应,制备了含不同软段的聚氨酯丙烯酸酯(PUA),研究了反应温度对以PEG600制备PUA反应过程中─NCO及C═C含量和PUA分子量的影响,确定了较佳的PUA合成工艺:第一步反应50°C/3.5 h,第二步反应65°C/2.5 h。通过红外光谱对PUA结构进行了表征,测试了其性能,以PEG600和PTMG1000制备的PUA按不同质量比复配,测试了复合胶的性能。结果表明,当2种PUA以3∶2质量比复配时,制备的光固化胶对玻璃附着力为1级,柔韧性1 mm,拉伸强度为9.71 MPa,剪切强度测试时玻璃基体断裂。该复合胶可作为粘接玻璃用胶和封口胶应用。
Polyurethane acrylates with different soft segments were prepared by reacting polyethylene glycol (PEG) and polytetramethylene ether glycol (PTMG) with toluene 2,4 diisocyanate (TDI) and hydroxyethyl acrylate (HEA) (PUA). The effects of reaction temperature on the content of NCO and C═C and the molecular weight of PUA during the preparation of PUA with PEG600 were studied. The best PUA synthesis process was determined: the first reaction was 50 ° C / 3.5 h, The second step reaction 65 ° C / 2.5 h. The structure of PUA was characterized by infrared spectroscopy. The properties of PUA were tested. The PUA prepared by PEG600 and PTMG1000 were compounded at different mass ratios, and the properties of the composites were tested. The results show that when the two kinds of PUA are compounded in the ratio of 3: 2, the prepared photo-curing adhesive has a glass adhesion of 1 grade, a flexibility of 1 mm and a tensile strength of 9.71 MPa. When the shear strength is measured, the glass matrix is broken . The composite adhesive can be used as adhesive glass and plastic sealant application.