- 學位論文
新穎性聚氨酯光固化樹脂成分系統於積層製造之研究
Study of novel polyurethane acrylic resin system for photo-cured additive manufacturing technology
摘要
聚氨酯(Polyurethane, PU)為光固化3D列印系統常見的樹脂，本實驗首先以兩步聚合法合成不同性質的聚氨酯，將聚氨酯混合光起始劑經光照後產生鍵結，再添加NIPAAm調整機械強度與彈性。使用光固化3D列印機列印出三維結構，以熱重分析儀(TGA)與拉伸試驗鑑定其結構與性質。 光固化聚合技術是一種使用特定波長能量照射在液體樹脂上，產生光聚合反應形成複雜形狀物件的列印方法。聚氨酯（PU）是一種高分子聚合物，由聚氨酯鏈接的有機單體組成，通常由二異氰酸酯或多異氰酸酯與多元醇通過改變硬鏈段的組成來合成聚胺酯。具有機械性能優良、成本低與具有環保特點。初步研究顯示，使用NIPAAm固化後抗壓強度雖然較低(60.11MPa)，但是延展性較佳(Strain=17.83%)。另一方面，添加水固化後抗壓強度最佳(151.58MPa)，但是延展性較差(Strain=7.17%)。本研究可以依照所需求，合成不同機械性質之配方。
並列摘要
Polyurethane (PU) is a common resin in the photo-curing 3D printing system. In this study, synthesized by the two-step polymerization method with different properties of polyurethanes, then PU mixed photoinitiator to form a bond by light, and NIPAAm was added to enhance the mechanical strength and elasticity. Finally, printing three-dimensional structure by the photo-curing 3D printer. The structure and properties characterized by Thermogravimetric analysis (TGA),and tensile tests. Photo-curing polymerization technology is a printing method that uses a specific wavelength to illuminate a liquid resin to produce a photopolymerization reaction to form a complex shaped object. Polyurethane (PU) is a high molecular weight polymer composed of polyurethane-linked organic monomers, which are usually synthesized by diisocyanates or polyisocyanates and polyols to changing the composition of the hard segments in PU. It has excellent mechanical properties, low cost, and environmental protection. Preliminary studies have shown that although the compressive strength after curing with NIPAAm is lower (60.11 MPa), the ductility is better (Strain = 17.83%). On the other hand, the compressive strength after the addition of water was the best (151.58 MPa), but the ductility was poor (Strain = 7.17%). This study can synthesize different mechanical properties according to the requirements.