In order to resolve the conflict issues existing in currently available polyurethane acrylate (PUA) oligomers for photo‐curable inkjet printing of textile, and to avoid the safety problems caused by the immigration of small molecule amine co‐initiator, a series of tertiary amine modified PUA oligomers are delicately designed and synthesized. The chemical structures of the synthesized PUA oligomers are confirmed by FTIR and ¹H‐NMR analyses. The optimized PUA oligomer/hydroxyethyl acrylate based polymerization system show a low viscosity, high storage stability and good compatibility with various functional segments. Furthermore, the modified PUA oligomer acts as both the photopolymerization constituent and the macromolecular co‐initiator assisting to achieve high photopolymerization rate and conversion rate, and avoiding the disadvantages caused by the migration of small amine co‐initiators. Benefitting from the semi‐IPN formed by this polymerization system with suitable crosslinking density and phase separation degree, a soft, strong and flexible cured film is obtained. The high photo‐reactivity with low viscosity of the polymerization system and the good flexibility with high strength of the resultant photo‐cured film ensures the applications of the modified PUA oligomer, and the printed fabrics achieve 4 grade of colorfastness with improved handle properties, as well as brilliant color and fine patterns.

中文翻译：

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具有共引发/聚合双功能的叔胺改性聚氨酯丙烯酸酯低聚物的设计和制备，用于光固化喷墨印花

为了解决目前可用于纺织品的光固化喷墨印刷的聚氨酯丙烯酸酯（PUA）低聚物中存在的冲突问题，并避免了由小分子胺助引发剂的迁移引起的安全问题，这是一系列改性的叔胺PUA低聚物经过精心设计和合成。FTIR和¹证实了合成的PUA低聚物的化学结构H-NMR分析。优化的基于PUA低聚物/丙烯酸羟乙酯的聚合体系显示出低粘度，高存储稳定性以及与各种功能段的良好相容性。此外，改性的PUA低聚物既充当光聚合成分，又充当高分子共引发剂，有助于实现高光聚合速率和转化率，并避免了由小胺共引发剂迁移引起的不利影响。得益于该聚合体系形成的半IPN，具有合适的交联密度和相分离度，可以得到柔软，牢固而柔软的固化膜。