摘要
以聚乙二醇(PEG)和柠檬酸(CA)为单体,通过熔融缩聚制备了新型的可生物降解弹性体聚柠檬酸聚乙二醇〔poly(PEG-co-CA),PEC〕,并通过改变后期交联时间得到了一系列透明柔软的弹性体。用傅里叶变换红外光谱、X射线衍射仪及差示扫描量热仪对PEC进行了初步表征,表明产物在室温下为无定形态,且玻璃化转变温度都在0℃以下;力学性能测试表明所得材料的弹性模量为0.251.91 MPa,扯断伸长率为239.4%1 505.5%;在37℃和pH值为7.4的磷酸缓冲溶液中进行了体外降解实验,结果表明该弹性体为一种降解较快的材料(浸泡80 h后所有试样的降解都超过60%)。同时发现其力学性能、吸水性能和降解性能可通过改变后期交联时间加以调节。
A novel biodegradable elastomer,poly(polyethylene glycol-co-citric acid)(PEC),was synthesized by condensation of poly(ethylene glycol) and citric acid.A series of transparent and soft elastomers were prepared at different post-polymerization time.PEC was characterized by Fourier transform infrared spectroscopy,X-ray di(ffraction) and differential scanning calorimetry.It was confirmed that elastomer was amorphous, with glass transition temperature(T_g) under(0 ℃.) Measurements on the mechanical properties of...
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2007年第1期10-13,共4页
China Synthetic Rubber Industry
基金
北京市自然科学基金重点资助项目(2061002)。
关键词
聚柠檬酸聚乙二醇
生物降解
制备
力学性能
吸水性能
poly(polyethylene glycol-co-citric acid)
biodegradation
preparation
mechanical property
water uptake property