Study on properties of light⁃cured resin products for 3D printing

doi:10.19491/j.issn.1001-9278.2022.05.008

Abstract

Abstract:

According to the current market demands for light curing （SLA） resins， bisphenol?A epoxy acrylate， diacrylate， and triacrylate resins together with a photo?initiator were used to prepare hard UV SLA resin products. The mechanical properties， viscosity， and volume shrinkage of the resultant resins was investigated using an electronic universal material testing machine， a plate rheometer， and an electronic hydrometer， and their product formulas were determined. SLA 3D printing was carried out using these formulas. The results indicated that 2.0 mol of oligomer bisphenol?A epoxy acrylate， 20.0 mol of active diluent， and an appropriate amount of photo?initiator were determined as a proper formula for the SLA resins. The SLA resins obtained a viscosity of 240.8 mPa?s， tensile strength of 47.1 MPa， elongation at break of 5.62 %， and a volume shrinkage rate of 4.44 %. The printed products exhibited a smooth surface and excellent performance.

Key words: light curing molding, epoxy resin, photoinitiator, viscosity, shrinkage

CLC Number:

TQ323.5

Cite this article

YI Huijun, TANG Ming, ZHANG Qingyi, BAI Yinna. Study on properties of light⁃cured resin products for 3D printing[J]. China Plastics, 2022, 36(5): 43-46.

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URL: https://www.plaschina.com.cn/EN/10.19491/j.issn.1001-9278.2022.05.008

https://www.plaschina.com.cn/EN/Y2022/V36/I5/43

Figures/Tables 5

Fig.1. Principle of SLA 3D printing molding

组分	组分含量/mmol	拉伸强度/MPa
二丙烯酸酯	40	58.96±3.03
	50	43.19±2.88
	60	47.12±2.06
	70	42.64±0.54
三丙烯酸酯	10	43.19±2.88
	15	35.35±2.07
	20	34.50±2.73
	25	29.18±2.94
双酚A环氧丙烯酸酯	8	19.72±3.47
	10	43.19±2.88
	12	41.79±3.86
	14	42.76±2.92

组分	组分含量/mmol	拉伸强度/MPa
二丙烯酸酯	40	58.96±3.03
	50	43.19±2.88
	60	47.12±2.06
	70	42.64±0.54
三丙烯酸酯	10	43.19±2.88
	15	35.35±2.07
	20	34.50±2.73
	25	29.18±2.94
双酚A环氧丙烯酸酯	8	19.72±3.47
	10	43.19±2.88
	12	41.79±3.86
	14	42.76±2.92

Tab.1. Effect of content of different component on tensile strength of SLA resin cured product

Fig.2. Effect of content of different component on viscosity of SLA resin

组分	组分含量/mmol	体积收缩率/%
二丙烯酸酯	40	5.47
	50	4.20
	60	4.23
	70	2.75
三丙烯酸酯	10	4.44
	15	5.09
	20	5.19
	25	5.80
双酚A环氧丙烯酸酯	8	6.03
	10	4.20
	12	4.87
	14	6.00

组分	组分含量/mmol	体积收缩率/%
二丙烯酸酯	40	5.47
	50	4.20
	60	4.23
	70	2.75
三丙烯酸酯	10	4.44
	15	5.09
	20	5.19
	25	5.80
双酚A环氧丙烯酸酯	8	6.03
	10	4.20
	12	4.87
	14	6.00

Tab.2. Effects of content of different component on volume shrinkage of SLA resin

Fig.3. Printed products made of SLA resin

References 4

1	刘海涛．光固化三维打印成形材料的研究与应用［D］.武汉：华中科技大学，2009．
2	KIM R J， KIM Y J， CHOI N S， et al. Polymerization shrinkage， modulus， and shrinkage stress related to tooth⁃restoration interfacial debonding in bulk⁃fill composites［J］. Journal of Dentistry，2015， 43（4）：430⁃439.
3	MIAO　X，LI　Y，ZHANG　Q，et al ．Low shrinkage light curable dental nanocomposites　using　SiO₂ microspheres as fillers［J］．Materials Science and Engineering： C， 2012， 32：2 115⁃2 121．
4	RUTTERMANN S， KRUGER S， RAAB W H， et al. Polymerization shrinkage and hygroscopic expansion of contemporaty posterior resin⁃based filling materials⁃a comparative study［J］. Journal of Dentistry， 2007， 35（10）：806⁃813.

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