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在HDI(六亚甲基二异氰酸酯)三聚体表面接枝纳米SiO_2(二氧化硅),然后再与HEA(丙烯酸羟乙酯)进行反应,制备了PUA(聚氨酯丙烯酸酯)/纳米SiO_2预聚体及其UV(紫外光)固化的杂化材料,并探讨了PUA/纳米SiO_2预聚体掺量对杂化材料的硬度、柔韧性、耐冲击性、透明性和耐热性等影响。研究结果表明:当w(PUA/纳米SiO_2预聚体)=60%(相对于杂化材料质量而言)时,杂化材料的综合性能相对最好,表现为其固化时间为38 s、硬度为6H、柔韧性为1 mm、耐冲击性为26.5 kg·cm、透光率超过90%和耐热性(超过250℃)较佳。
The nano-SiO 2 (silica) was grafted onto the surface of HDI (hexamethylene diisocyanate) trimer and then reacted with HEA (hydroxyethyl acrylate) to prepare PUA (polyurethane acrylate) / nano-SiO 2 prepoly And its UV (UV) cured hybrid materials, and discussed PUA / nano-SiO 2 prepolymer hybrid materials hardness, flexibility, impact resistance, transparency and heat resistance and so on. The results show that when the content of PUA / nano-SiO_2 prepolymer = 60% (relative to the mass of hybrid material), the hybrid material has the best comprehensive performance, the curing time is 38 s, the hardness Is 6H, the flexibility is 1 mm, the impact resistance is 26.5 kg · cm, the light transmittance is over 90% and the heat resistance (over 250 ° C) is preferable.