| 3 | 光敏树脂3D打印适用性的流变学表征方法显示文摘通过旋转流变仪联用自制的光固化装置,在光固化过程中采用动态流变测试的时间扫描模式研究液态光敏树脂光固化特性,在光固化前采用稳态流动测试和动态频率扫描探测树脂的流动特性,在光固化后采用动态应力扫描原位分析成型材料的力学性能。结果表明,树脂光固化前的黏度约为0.5 Pa·s,流动性较好;光固化中树脂固化需要的紫外光照射时长为3.8 s,光反应活性较好;光固化后树脂的剪切弹性模量为1.2 MPa,质地较软,剪切强度可达21 kPa以上。试验结果表明,通过流变测试手段能够从流动性、光固化活性、固化物力学性能三个方面量化表征光敏树脂的3D打印适用性。 | 黄宇刚 宋旺奕 赵素华 张可 | 2022 | 工程塑料应用2022，50，1： | 2 |
| 4 | Synthesis of 1,1,3,3,5,5-hexamethyl-1,5-bis[(3-ethyl-3-methoxyoxetane)propyl]trisiloxane and Research on Its UV-curing Performance显示文摘A compound,3-ethyl-3-hydroxymethyloxetane(EHO),was synthesized with diethyl carbonate and trihydroxypropane as raw materials,3-ethyl-3-allylmethoxy oxetane(EAMO)was synthesized with EHO and allyl bromide,and 1,1,3,3,5,5-hexamethyl-1,5-bis[(3-ethyl-3-methoxyoxetane)propyl]trisiloxane(HMBEMOPTS)was synthesized with EAMO and 1,1,3,3,5,5-hexamethyltrisiloxane(HMTS).HMBEMOPTS is a novel UV-curable oligomer.The test of photo-DSC shows the photosensitivity of HMBEMOPTS is better than the ordinary oxetane,3-ethyl-3-[(3-ethyloxetan-3-yl)methoxymethyl]oxetane.HMBEMOPTS was mixed with bisphenol A type epoxy resin E-51 to prepare a cationic UV-curable system,and triarylsulfonium hexafluoroantimonate(UV-6976)was used as a cationic photoinitiator.The mechanical tests of coating films prove that when the mass fraction of HMBEMOPTS is 50%,the mechanical properties of the curing system are the best.The impact strength of the UV-curable films is measured to be 40 kg·cm and the flexibility is 2 mm;the tensile strength and flexural strength of the prepared specimens are 20.74 MPa and 13.43 MPa,respectively.The experimental results show that HMBEMOPTS can effectively improve photosensitivity and flexibility of the photosensitive resin. | 胡思炜 黄笔武 CHEN Weiqing | 2021 | Journal of Wuhan University of Technology(Materials Science)2021，36，6： | 1 |
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