Synthesis and microstructure–mechanical property relationships of segmented polyurethanes based on a PCL–PTHF–PCL block copolymer as soft segment
Synthesis and microstructure–mechanical property relationships of segmented polyurethanes based on a PCL–PTHF–PCL block copolymer as soft segment
复制标题
DOI：
10.1016/j.eurpolymj.2009.03.013
复制
发表时间：
2009-07
影响因子：
6
通讯作者：
L. Rueda-Larraz;B. F. d’Arlas;A. Tercjak;A. Ribes;I. Mondragon;A. Eceiza
中科院分区：
文献类型：
--
作者：
L. Rueda-Larraz;B. F. d’Arlas;A. Tercjak;A. Ribes;I. Mondragon;A. Eceiza
本工作的目标是合成基于可生物降解的聚己内酯-嵌段-聚四氢呋喃-嵌段-聚己内酯二醇（PCL-b-PTHF-b-PCL）的新型材料。在无催化剂的条件下，以不同的摩尔比合成了嵌段热塑性聚氨酯（STPU），并通过不同的技术对其进行了表征。物理化学相互作用，负责独特的聚氨酯性能，已通过总衰减傅里叶变换红外光谱（ATR-IR）在酰胺I区域使用高斯去卷积技术进行了评估，另一方面，原子力显微镜（AFM）已被用来确定相的微观结构。通过差示扫描量热法（DSC）、动态力学分析（DMA）和热重分析（TGA），从硬段和软段的相容性角度讨论了增加硬段含量（HS）的效果。研究了HS含量对合金组织-力学性能关系的影响。特别关注的是通过水接触角测量（WCA）测量的样品的润湿性，以确定样品的生物相容性趋势。
The goal of this work has been the synthesis of novel materials based on a biodegradable polycaprolactone-block–polytetrahydrofurane-block–polycaprolactone diol (PCL-b–PTHF-b–PCL). The segmented thermoplastic polyurethanes (STPU) have been synthesised in bulk without catalyst at different molar ratios and their characterization has been performed by different techniques. The physic-chemical interactions, responsible for the unique polyurethane properties, have been evaluated by total attenuated Fourier transform infrared spectroscopy (ATR-IR) in the amide I region using a Gaussian deconvolution technique and, on the other hand, atomic force microscopy (AFM) has been employed to determine the phase microstructures. The effect of increase the hard segment content (HS) has been discussed from the viewpoint of the miscibility of hard and soft segments, analyzed by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA). The influence of HS content on the microstructure–mechanical property relationships has also been investigated. Special attention has been focused on the wettability of the samples, measured through water contact angle measurements (WCA), to determine the tendency for biocompatibility of the samples.