Vat photopolymerization using catalytic chain transfer polymerization (CCTP) derived reactive oligomers to influence mechanical properties,Polymer Chemistry

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Vat photopolymerization using catalytic chain transfer polymerization (CCTP) derived reactive oligomers to influence mechanical properties
Polymer Chemistry ( IF 4.1 ) Pub Date : 2024-07-03 , DOI: 10.1039/d4py00482e
Wai Hin Lee _{1,

2} , Zhongyuan Wan ₂ , Ataulla Shegiwal ₁ , David Haddleton ₂

Affiliation

ω-Vinyl terminated reactive oligomers of 2-ethylhexyl methacrylate and poly(ethylene glycol)methacrylate (PEGMA) were synthesized via catalytic chain transfer polymerization (CCTP) and subsequent addition–fragmentation chain transfer (AFCT) polymerization. The reactive oligomers were then incorporated into 3D-printing resins composed of isobornyl acrylate and poly(ethylene glycol)diacrylate (PEGDA). The formulations were used in digital light processing (DLP) 3D printing, and the mechanical properties of the printed parts evaluated. The effects of concentration, molecular weight and chemistry of the reactive oligomers additives were investigated. It was found that EHMA based reactive oligomers acted as plasticizers resulting in the weakening of the printed objects, whereas PEGMA based reactive oligomers transformed the objects from stiff and brittle to ductile elastomer-like materials.

中文翻译：

使用催化链转移聚合 (CCTP) 衍生的反应性低聚物进行还原光聚合来影响机械性能

通过催化链转移聚合（CCTP）和随后的加成-断裂链转移（AFCT）聚合合成了甲基丙烯酸2-乙基己酯和聚（乙二醇）甲基丙烯酸酯（PEGMA）的ω-乙烯基封端的反应性低聚物。然后将反应性低聚物掺入由丙烯酸异冰片酯和聚乙二醇二丙烯酸酯 (PEGDA) 组成的 3D 打印树脂中。该配方用于数字光处理 (DLP) 3D 打印，并对打印部件的机械性能进行评估。研究了反应性低聚物添加剂的浓度、分子量和化学性质的影响。研究发现，基于 EHMA 的反应性低聚物充当增塑剂，导致打印物体变弱，而基于 PEGMA 的反应性低聚物将物体从硬而脆的材料转变为具有延展性的弹性体状材料。

更新日期：2024-07-03

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