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3D打印技術(shù)/3D print technology

光固化3D打印技術(shù)是3DP領(lǐng)域中制件成型效率和精度最高的一種技術(shù)。該材料目前存在的主要問(wèn)題是韌性差和固化體積收縮率高。

UV-curing 3D printing is considered as the most precise and most efficient modeling and forming technology in the 3DP field. Main problems of this material are poor toughness and high cured volume shrinkage.

常用預(yù)聚物/Common prepolymers

常用預(yù)聚物分為以下幾種類(lèi)型，它們的性能特點(diǎn)也各不相同。

Commonly used prepolymers can be divided into the following types, and their performance characteristics are also different.

目前常用的陽(yáng)離子型預(yù)聚物是環(huán)氧樹(shù)脂和乙烯基醚類(lèi)樹(shù)脂。乙烯基醚類(lèi)樹(shù)脂由于固化速度慢，適用范圍窄。環(huán)氧樹(shù)脂分為縮水甘油醚（或酯）類(lèi)環(huán)氧樹(shù)脂和脂環(huán)族環(huán)氧樹(shù)脂等兩類(lèi)?？s水甘油醚（或酯）類(lèi)環(huán)氧樹(shù)脂由于活性低、反應(yīng)慢和生成的聚合物分子量低在陽(yáng)離子光固化領(lǐng)域一直處于劣勢(shì)地位。脂環(huán)族環(huán)氧樹(shù)脂由于具有活性高、反應(yīng)過(guò)程中產(chǎn)生的收縮小、粘度低及毒性低等優(yōu)點(diǎn)，一直在陽(yáng)離子光固化領(lǐng)域處于優(yōu)勢(shì)地位。

The commonly used cationic prepolymers are epoxy resins and vinyl ether resins. Vinyl ether resins have a narrow application range due to their slow curing speed. Epoxy resins are divided into two categories: glycidyl ether (or ester) epoxy resins and cycloaliphatic epoxy resins. Glycidyl ether (or ester) epoxy resins have always been at a disadvantage in the field of cationic UV curing due to their low activity, slow reaction and low molecular weight of the resulting polymer. Cycloaliphatic epoxy resins have always been in a dominant position in the field of cationic UV curing due to their high activity, small shrinkage during reaction, low viscosity and low toxicity, etc.

新納希S-28/Synasia S-28

S-28

CAS-3130-19-6

Syna-Epoxy 28是一種標(biāo)準(zhǔn)的脂環(huán)族環(huán)氧樹(shù)脂，適用于需要更高粘度或更柔韌薄膜的眾多應(yīng)用中。

· 可以進(jìn)行光固化

· 可以和酸酐進(jìn)行熱固化

· 韌性高

Syna-Epoxy 28 is a standard cycloaliphatic epoxy resin suitable for use in many applications, where higher viscosity or more flexible films are required.

? UV curable

? Thermally curable with anhydrides

? High toughness

規(guī)格參數(shù)

Specifications

相關(guān)實(shí)驗(yàn)研究

根據(jù)相關(guān)學(xué)者研究發(fā)現(xiàn)，選取環(huán)氧丙烯酸酯EA以及脂環(huán)族環(huán)氧樹(shù)脂S-28作為預(yù)聚物，由于S-28的粘度比EA小，因此加大其用量必然導(dǎo)致3D打印材料的粘度降低。S-28以陽(yáng)離子聚合方式參加光固化反應(yīng)，其光固化速度較自由基體系固化速度慢，隨著S-28含量增加，3D打印材料的光固化速度降低。自由基型預(yù)聚物環(huán)氧丙烯酸酯參加聚合反應(yīng)時(shí)體積收縮率較陽(yáng)離子型預(yù)聚物環(huán)氧樹(shù)脂體積收縮率大，所以隨著S-28含量增加，3D打印材料的體積收縮率降低。

Experimental research

According to the research, some scholars choose epoxy acrylate EA and cycloaliphatic epoxy resin S-28 as prepolymers. Since the viscosity of S-28 is lower than that of EA, increasing its dosage will inevitably lead to a decrease in the viscosity of 3D printing materials. S-28 participates in the UV-curing reaction by cationic polymerization, and its UV-curing speed is slower than that of free radical systems. With the increase of S-28 dosage, the UV-curing speed of 3D printing materials decreases. The volume shrinkage rate of free-radical epoxy acrylate prepolymer is larger than that of cationic epoxy resin prepolymer when it participates in the polymerization reaction. As the dosage of S-28 increases, the volume shrinkage rate of 3D printing materials decreases.

實(shí)驗(yàn)結(jié)果

通過(guò)大量實(shí)驗(yàn)研究和總結(jié)分析，選擇了力學(xué)性能佳的預(yù)聚物EA和S-28，稀釋效果較好的稀釋劑TMPTMA和DVE-3，引發(fā)自由基/陽(yáng)離子混雜光固化體系效率高的ITX及Irgacure 250復(fù)配光引發(fā)劑，助引發(fā)劑6420-TF以及多羥基化合物PAS-12作為高韌性混雜固化型3D打印材料的主要組分。

Experimental results

After a large number of experimental studies and summary analysis, when the prepolymers EA and S-28 with good mechanical properties are selected, the diluents TMPTMA and DVE-3 can offer a better dilution effect. The photoinitiators ITX and Irgacure 250 are highly efficient in initiating free radical/cationic hybrid UV-curing systems. The co-initiator 6420-TF and polyhydroxy compound PAS-12 are also used as the main component of the high toughness hybrid cured 3D printing material. 

南通新納希新材料有限公司是全球領(lǐng)先的脂環(huán)族環(huán)氧樹(shù)脂生產(chǎn)商，可提供S-06E、S-21、S-28等多種牌號(hào)，歡迎廣大客戶(hù)來(lái)電垂詢(xún)。

Nantong Synasia New Material Co., Ltd. is the world's leading manufacturer of cycloaliphatic epoxy resins. We can provide a variety of product grades such as S-06E, S-21, S-28, etc. Welcome all customers to contact or call us.