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首页> 外文期刊>Journal of Applied Polymer Science >Study on curing shrinkage and mechanism ofDHOM-modified epoxy-acrylate-basedUV-curing3Dprinting materials
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Study on curing shrinkage and mechanism ofDHOM-modified epoxy-acrylate-basedUV-curing3Dprinting materials

机译：亚料改性环氧树脂 - 丙烯酸盐型施胶固化料施用收缩及机理研究

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摘要

UV-curing 3D printing technology is one of the technologies with the highest molding efficiency and accuracy in the field of 3D printing. At present, the main problems of UV-curing 3D printing materials include the high curing shrinkage and the low toughness. In this work, free radical/cation hybrid curing system was developed, the effects of expansion monomer (DHOM, 3,9-diethyl-3 ',9 '-dihydro-xymethyl-1,5,7,11-tetraoxaspiro[5,5]undecanone) on the curing shrinkage, toughness, and other properties of the epoxy acrylate-based UV-curing 3D printing materials were investigated. The results showed that when the added amount of DHOM was 15 wt%, the best comprehensive performance of UV-curing 3D printing materials was obtained. At this time, the curing shrinkage rate decreased from 6.13% to 3.47%. The main reason was that DHOM undergoes ring-opening polymerization under the action of cationic photoinitiator, resulted in volume expansion. The impact strength increased from 9.61 to 12.13 KJ/m(2), which was because that the ring-opening reaction of DHOM reduced the curing shrinkage of the resin system and released the internal stress between the resin molecules.
机译：UV固化3D打印技术是3D打印领域中成型效率和精度最高的技术之一。目前，UV固化3D打印材料的主要问题包括固化收缩率高和韧性低。本研究开发了自由基/阳离子杂化固化体系，研究了膨胀单体（DHOM，3,9-二乙基-3'，9'-二羟甲基-1,5,7,11-四氧基吡啶[5,5]十一酮）对环氧丙烯酸酯基UV固化3D打印材料固化收缩率、韧性等性能的影响。结果表明，当DHOM的添加量为15%时，UV固化3D打印材料的综合性能最好。此时，固化收缩率从6.13%降至3.47%。主要原因是DHOM在阳离子光引发剂作用下发生开环聚合，导致体积膨胀。冲击强度从9.61 KJ/m（2）提高到12.13 KJ/m（2），这是因为DHOM的开环反应降低了树脂体系的固化收缩，释放了树脂分子之间的内应力。

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