Meyer Wolfdietrich, Engelhardt Sascha, Novosel Esther, Elling Burkhard, Wegener Michael, Krüger Hartmut
Fraunhofer Institute of Applied Polymer Research (IAP), Geiselbergstr 69, Potsdam 14476, Germany.
Rheinisch-Westfälische Technische Hochschule Aachen, RWTH Aachen, Steinbachstraße 15, Aachen 52074, Germany.
J Funct Biomater. 2012 Mar 29;3(2):257-68. doi: 10.3390/jfb3020257.
Synthesis of a homologous series of photo-polymerizable α,w-polytetrahydrofuranether-diacrylate (PTHF-DA) resins is described with characterization by NMR, GPC, DSC, soaking and rheometrical measurements. The curing speeds of the resins are determined under UV light exposure. Young's modulus and tensile strength of fully cured resins show flexible to soft material attributes dependent on the molar mass of the used linear PTHF-diacrylates. Structuring the materials by stereo lithography (SL) and multiphoton polymerization (MPP) leads to tubes and bifurcated tube systems with a diameter smaller than 2 mm aimed at small to smallest supplying systems with capillary dimensions. WST-1 biocompatibility tests ofm polymer extracts show nontoxic characteristics of the adapted polymers after a washing process. Some polymers show shape memory effect (SME).
描述了一系列可光聚合的α，ω-聚四氢呋喃醚二丙烯酸酯（PTHF-DA）树脂的合成，并通过核磁共振（NMR）、凝胶渗透色谱（GPC）、差示扫描量热法（DSC）、浸泡和流变测量进行了表征。在紫外光照射下测定了树脂的固化速度。完全固化树脂的杨氏模量和拉伸强度显示出取决于所用线性PTHF-二丙烯酸酯摩尔质量的从柔性到软质材料的属性。通过立体光刻（SL）和多光子聚合（MPP）对材料进行结构化处理，可得到直径小于2mm的管和分叉管系统，适用于具有毛细管尺寸的从小到最小的供应系统。聚合物提取物的WST-1生物相容性测试表明，经过洗涤过程后，改性聚合物具有无毒特性。一些聚合物表现出形状记忆效应（SME）。
