A kind of rosin epoxy soybean oil acrylate (RBAESO) containing high bio-renewable carbon content was synthesized by using rosin and acrylic acid (AA) to react with epoxidized soybean oil (ESO), and the effects of rosin addition amount on the properties of RBAESO resin and its cured film were investigated. The reaction activity between carboxylic acid and the epoxy group was found improved by introducing natural rosin to replace part of AA and increasing the CC double bond density of the molecular structure. The best prepolymer resin RBAESO-15 % performance was obtained with a reaction molar ratio of ESO: AA: Rosin = 1.05:0.85: 0.15. RBAESO-15 % has a viscosity of 16500 mPa·s. The cured film of RBAESO-15 % displayed high pencil hardness up to H, and 2 mm of flexibility. The introduction of rosin also increased the high bio-renewable carbon content of the resin from 80.3 % to 89.6 % compared to epoxy soybean oil acrylate (AESO). UV cured tested show the CC double-bond conversion of RBAESO-15 % is about 86.4 %, which is higher than that of AESO, and the tensile strength and elongation at break increased from 3.2 MPa and 7.4 % to 14.4 MPa and 12.1 %, respectively. This indicates that RBAESO displays better coating film performance than those of AESO. In addition, RBAESO-15 % with 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) can be applied to the laser cladding deposition (LCD) 3D printers.

中文翻译：

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高生物可再生碳含量的3D打印松香环氧大豆油丙烯酸酯的制备


以松香、丙烯酸(AA)与环氧化大豆油(ESO)反应合成了一种高生物可再生碳含量的松香环氧大豆油丙烯酸酯(RBAESO),并研究了松香添加量对其性能的影响。对RBAESO树脂及其固化膜进行了研究。通过引入天然松香代替部分AA并增加分子结构的CC双键密度，可以提高羧酸与环氧基团的反应活性。当反应摩尔比为ESO：AA：松香=1.05：0.85：0.15时，获得了最佳的预聚物树脂RBAESO-15%性能。 RBAESO-15%的粘度为16500 mPa·s。 RBAESO-15% 的固化膜表现出高达 H 的高铅笔硬度和 2 毫米的柔韧性。与环氧大豆油丙烯酸酯 (AESO) 相比，松香的引入还使树脂的高生物可再生碳含量从 80.3% 提高到 89.6%。 UV固化测试表明RBAESO-15%的CC双键转化率约为86.4%，高于AESO，拉伸强度和断裂伸长率从3.2MPa和7.4%提高到14.4MPa和12.1%，分别。这表明RBAESO比AESO表现出更好的涂膜性能。此外，含有2,4,6-三甲基苯甲酰基-二苯基氧化膦（TPO）的RBAESO-15%可应用于激光熔覆沉积（LCD）3D打印机。