聚己二酸丁二醇酯的制备与表征
Preparation and Characterization of Poly(butylene adipate)
杨代兰 1杨震 2李梓媛 1袁明龙 1李袁帅 1袁明伟1
作者信息
- 1. 云南民族大学化学与环境学院, 生物基材料绿色制备技术国家地方联合工程研究中心, 云南 昆明 650500
- 2. 湖北省红安县第一中学, 湖北 黄冈 438400
- 折叠
摘要
在180～200℃、质量分数为0.2%的钛酸四丁酯催化剂的条件下,1,6-己二酸和1,4-丁二醇(酸/醇物质的量比为1 ∶1.05、1 ∶1.10、1 ∶1.15、1 ∶1.20、1 ∶1.25)通过酯化、缩聚合成以羟基封端的、生物降解的聚己二酸丁二醇酯(PBA),同时比较不同酸/醇物质的量比合成的PBA性能,筛选出合成PBA的最佳酸/醇物质的量比.结果表明,酸/醇物质的量比为1 ∶1.05时,PBA的分子量(31 884)最高,产物具有一定的韧性、更优异的拉伸性能和较高的薄膜平整度,拉伸强度为 15.81 MPa,断裂伸长率高达824.62%;5 个酸/醇物质的量比条件下制备的PBA的热分解温度均在350℃以上,产物具有较好的热稳定性.该合成方法的装置简单、聚合时间相对较短,且实验条件易于实现.
Abstract
Under the tetrabutyl titanate catalyst with a mass fraction of 0.2%and at 180-200℃,hydroxy-terminated biodegradable poly(butylene adipate)(PBA)was synthesized by the esterification and polycondensation of 1,6 adipic acid and 1,4-butanediol,with the molar ratios of 1,6 adipic acid and 1,4-butanediol are 1 ∶1.05,1 ∶1.10,1 ∶1.15,1 ∶1.20,1 ∶1.25.The properties of PBA synthesized by different molar ratios of acid to alcohol were compared,and the best molar ratio of acid to alcohol was selected for PBA synthesis.The results show that when the molar ratio of acid to alcohol is 1 ∶ 1.05,PBA has the highest molecular weight(31 884).The product has certain toughness,better mechanical properties and higher flatness.Its tensile strength is 15.81 MPa and its elongation at break is824.62%.The heat decomposition temperatures of all the samples are above 350℃,the products have good thermal stability.The synthesis devices are simple,the polymerization time is relatively short,and the experimental conditions are easy to realize.
关键词
聚己二酸丁二醇酯/生物降解/脂肪族聚酯/热稳定性/拉伸性能Key words
Poly(Butylene Adipate)/Bio-degradable/Aliphatic Polyester/Thermal Stability/Tensile Property引用本文复制引用
基金项目
国家自然科学基金(52163013)
云南省"千人计划"培养项目(YNQR-CYRC-2018-012)
出版年
2024
NETL
NSTL
万方数据