论文总字数：25761字

摘 要

3D打印技术是一种以数字建模为基础，基于微喷射原理，通过材料的精确堆积来制造零件的一种快速成型技术。3D打印材料作为3D打印技术的关键，它的开发是光固化成型技术的核心问题之一。目前3D打印材料存在固化后体积收缩大及力学性能差等问题，影响制造精度，严重制约3D打印技术的发展。

为了找出体积收缩率最小，力学性能优良的活性单体与树脂配制，从而扩大光固化树脂的应用。本文通过研究不同单体及其不同含量对3D打印材料体积收缩的影响，得出如下结论：

讨论不同活性单体对固化体系性能的影响，结果显示，活性单体的官能度越高，体系的粘度和体积收缩就越大。

考察TPGDA含量分别对269树脂体系和4210树脂体系性能的影响。研究表明，TPGDA下降20%，4210树脂体系的拉伸强度上升25.37%； 269体系的断裂伸长率上升11.47%。

在分别以269树脂和4210树脂为齐聚物的基础上，研究混合单体不同质量比对这两种体系性能的影响。结果表明，TTR08增加30%，269体系的断裂伸长率上升3.95%；而对4210的体系下降了1.69%。

以TTSMO和TPGDA互配作为活性单体，研究单体不同质量比对269固化体系性能的影响。研究表明，TTSMO含量增加了80%，其体积收缩率、断裂伸长率分别下降1.5%、25.33%，而拉伸强度则上升了60.3%。

选用性能较好的TPGDA为活性单体，探讨不同比例4210和269树脂对固化体系性能的影响。结果显示，随着4210含量增加60%，其体积收缩率、拉伸强度和粘度分别增加了3.79%、12.94%、55%，而断裂伸长率下降了4.43%。

关键词: 活性单体 体积收缩 拉伸强度 断裂伸长率

Abstract

3D printing technology is a rapid prototyping technique for manufacturing components based on the principle of digital modeling, based on the principle of microjetting. As the key of 3D printing technology, the development of 3D printing materials is one of the core problems of the photocurable forming technology. At present, 3D printing materials have the problems of large volume shrinkage and poor mechanical performance after curing, which affect the manufacturing precision and seriously restrict the development of 3D printing technology.

In order to find out the minimum shrinkage of the volume, good mechanical properties of the active monomer and resin mix, so as to expand the application of photocuring resin. By studying the influence of different monomers and their contents on the volume shrinkage of 3D printing materials, the following conclusions are drawn:

The effects of different active monomers on the properties of the curing system were discussed. The results showed that the higher the functional degree of the active monomers was, the greater the viscosity and volume of the system would be.

The effect of TPGDA content on the properties of the 269 resin system and the 4210 resin system was examined. Studies have shown that TPGDA decreased by 20%, the tensile strength of the 4210 resin system increased by 25.37%, and the elongation at break of the 269 system increased by 11.47%.

On the basis of using 269 resin and 4210 resin as oligomers, respectively, the effects of different mass ratios of mixed monomers on the performance of these two systems were studied. The results showed that the TTR08 increased by 30%, the elongation at break of the 269 system increased by 3.95%, while that of the 4210 system decreased by 1.69%.

Using TTSMO and TPGDA as the active monomers, the effects of different mass ratios of monomers on the performance of 269 curing system were studied. Studies have shown that TTSMO content increased by 80%, and its volume shrinkage and elongation at break decreased by 1.5% and 25.33%, respectively, while tensile strength increased by 60.3%.

TPGDA with good performance was selected as the active monomer to investigate the effect of different ratios of 4210 and 269 resins on the performance of the curing system. The results showed that as the content of 4210 increased by 60%, the volume shrinkage, tensile strength, and viscosity increased by 3.79%, 12.94%, and 55%, respectively, while the elongation at break decreased by 4.43%.

Key Words: Reactive monomer; Volume shrinkage; Tensile Strength; Fracture elongation

目 录

摘 要

Abstract

第一章 文献综述 1

1.1 前言 1

1.2光固化3D打印原料 2

1.2.1 预聚物 2

1.2.2光引发剂 3

1.2.3 活性单体 3

1.2.4 助剂 10

1.3 活性单体的研究进展 10

1.4 本文研究意义和目的 11

第二章 实验部分 12

2.1 实验原料 12

2.2 实验仪器 13

2.3 实验方法 13

2.3.1 光固化材料的制备 13

2.3.2 性能测定 14

第三章 结果与讨论 16

3.1单体的选择 16

3.1.1不同单体对固化体系体积收缩率的影响 16

3.1.2不同单体对固化体系力学性能的影响 17

3.2不同单体与改性脂肪族聚氨酯树脂体系的性能研究 18

3.2.1 TPGDA含量对固化体系体积收缩率和力学性能的影响 18

3.2.2 TTR08/TTSMO质量比对固化体系体积收缩率和力学性能的影响 19

3.2.3 TTSMO/TPGDA质量比对固化体系体积收缩率和力学性能的影响 20

3.3不同单体与环氧丙烯酸酯树脂体系的性能研究 21

3.3.1 TPGDA含量对固化体系体积收缩率和力学性能的影响 21

3.3.2 TTR08/TTSMO质量比对固化体系体积收缩率和力学性能的影响 22

3.4预聚体质量比对固化体系的性能研究 23

第四章 结论与展望 24

4.1 结论 24

4.2 展望 24

参考文献 25

致谢 28

第一章 文献综述

1.1 前言

3D打印是在数字建模的基础上，以粘合性材料为原料，通过3D打印设备进行逐层堆积，从而得到所需的产品，是一种快速成型技术^[1]。相对于传统的制造技术，3D打印技术拥有其独特的优势，主要体现在如下几个方面。

(1) 3D打印技术降低原材料的耗费，能有效地提高了材料的利用率^[2]。3D打印技术又被称为增材制造技术，能够比切削加工等传统加工方式节省三分之一

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