阳离子型UV固化树脂体系及纳米Si0_2改性的性能研究
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摘要
以脂肪族树脂K126和3-乙基-3-羟甲基氧杂环丁烷为主要原料,加入光引发剂三苯基硫鎓六氟磷酸盐配制成阳离子光固化体系。通过固化前后红外谱图的对比表明光引发剂三苯基硫鎓六氟磷酸盐在紫外光的照射下可有效的引发脂肪族环氧化合物的光聚合,并且对体系的固化时间,黏度,固化速度,体积收缩率等进行了测试,重点研究了光固化树脂以及稀释剂含量对体系收缩率的影响,配制出了性能优异、黏度低且收缩率低的配方。同时向体系中加入纳米二氧化硅进行配方实验,通过SEM,TEM对其分散性进行表征,证明了加入纳米二氧化硅可有效地降低体系的收缩率并且提升复合材料的力学性能。
A novel of UV-Cured cationic system was prepared with aliphatic resin K126 and 3-ethyl-3-hydroxymethyl oxetane as main materials, and triphenylsulfonium hexafluorophosphate as photoinitiator mixed into this system. FTMR spectrum of reaction before and after curing on cationic UV-curing show that photoinitiator can effectively initiate aliphatic epoxy compound under ultraviolet irradiation to induce photochemical polymerization, and tested the Curing time, Viscosity,Curing speed, volume contractive rate by different experiments. Focusing on the effect of light-cured resin and diluent on the contraction percentage in this system, the formulation was prepared with excellent properties, low viscosity and low volume contractive rate. Adding Nano-silica to this system by using SEM and TEM to characterize its dispersibility, it is proved that Nano-silica can effectively reduce the volume contractive rate and improve the composites mechanical properties.
A novel of UV-Cured cationic system was prepared with aliphatic resin K126 and 3-ethyl-3-hydroxymethyl oxetane as main materials, and triphenylsulfonium hexafluorophosphate as photoinitiator mixed into this system. FTMR spectrum of reaction before and after curing on cationic UV-curing show that photoinitiator can effectively initiate aliphatic epoxy compound under ultraviolet irradiation to induce photochemical polymerization, and tested the Curing time, Viscosity,Curing speed, volume contractive rate by different experiments. Focusing on the effect of light-cured resin and diluent on the contraction percentage in this system, the formulation was prepared with excellent properties, low viscosity and low volume contractive rate. Adding Nano-silica to this system by using SEM and TEM to characterize its dispersibility, it is proved that Nano-silica can effectively reduce the volume contractive rate and improve the composites mechanical properties.
引文
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[5]Gurr M,Hofmann D,Ehm M,et al.Acrylic Nanocomposite Resins for Use in Stereolithography and Structural Light Modulation Based Rapid Prototyping and Rapid Manufacturing Technologies[J].Advanced Functional Materia ls.2010,18(16):2390-2397.
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