论文部分内容阅读
以聚乙二醇/聚己内酯(PEG/PCL)为复合软段,采用二丁基二月桂酸锡(DBTL)和三乙烯二胺(A33)作为复合催化剂,采用硅油(AK8807)作为泡沫稳定剂,由一步法制得了具有均匀泡孔且开孔率较高的可降解PUF(聚氨酯泡沫塑料);采用红外分析(IR)、光学显微镜等分析手段对这些材料的结构和形貌进行了表征,考察了材料的力学与热稳定性等性能。结果表明:随着PEG-400的升高,PUF的拉伸强度、断裂伸长率和压缩强度基本呈现非常明显的下降趋势;PEG-400:PCL-210N比例为100:0时分解温度最高,比例为70:30时分解温度最低,而最大热失重温度所反映的热稳定性好坏和起始温度所反映的基本是一致的;PUF的Tg处于-70℃到-30℃范围内,并随着PEG-400含量的增加呈提高趋势,这与其热稳定性相一致。
Polyethylene glycol / polycaprolactone (PEG / PCL) was used as the soft soft segment, dibutyltin dilaurate (DBTL) and triethylenediamine (A33) were used as composite catalysts, and silicone oil (AK8807) Stabilizer, the biodegradable PUF (polyurethane foam) with uniform cell and high opening ratio was obtained by one-step method. The structure and morphology of these materials were characterized by IR and optical microscope , Investigated the material properties such as mechanical and thermal stability. The results showed that with the increase of PEG-400, the tensile strength, elongation at break and compressive strength of PUF tended to decrease obviously. When the ratio of PEG-400 to PCL-210N was 100: 0, the decomposition temperature was the highest, The decomposition temperature was the lowest at 70:30, while the thermal stability reflected by the maximum weight loss temperature was consistent with the initial temperature. The Tg of PUF was in the range of -70 ℃ to -30 ℃ With the increase of PEG-400 content increased, which is consistent with its thermal stability.