聚丁二酸丁二醇二甘醇酯的合成与性能研究-毕业论文.doc

聚丁二酸丁二醇/二甘醇酯的合成与性能研究
摘要
20世纪出现的新材料——合成高分子材料以年产量超过114亿吨成为人类使用量最大的材料品种。随着人类迈入21世纪,在合成材料方面至少面临两方面挑战:其一,作为合成材料的主要原料,石油已面临枯竭,人类必须寻找一种能弥补甚至替代石油原料的新的合成材料体系;其二,目前称之为“白色污染”的问题远未根本解决,大量塑料废弃物的焚烧引起的环境污染已更深层次的影响着地球的生态平衡。从这个意义上讲,具有可生物降解性的新型脂肪族聚酯材料极有可能成为新的环保“绿色材料”。目前研究的可生物降解聚合物中,有一大类是聚酯。其主链大都由脂肪族结构单元通过易水解的酯键连接而成。由于其主链柔顺,因而易被生物界中多种微生物或动物体内酶分解、代谢,最终生成二氧化碳和水。聚丁二酸丁二醇酯( PBS)是其中熔点较高的一种聚酯,其性能优良有广泛的应用领域,但其二元均聚物性能难以满足某些使用要求,一般采用共聚或共混的方法对其改性的方法。
本文主要通过研究聚丁二酸丁二醇/二甘醇酯的合成,最适合的聚合催化剂单丁基氧化锡(MBTO),:1,最适合的酯化温度,缩聚温度以制备不同丁二醇与二甘醇配比的样品。然后通过对所制样品的分子量测定,1H-NMR测定,差示扫描量热仪(DSC)进行热性能测试,拉伸性能测试,降解性能测试,得出最佳的丁二醇与二甘醇的配比。获得适合市场需要的分子量高,低成本,力学性能优良,不污染环境的新型高聚物据丁二酸丁二醇/二甘醇酯(PBDGS)。
关键词:聚丁二酸丁二醇/二甘醇酯降解二甘醇分子量单丁基氧化锡
Poly butylene / diethylene glycol ester synthesis and properties
ABSTRACT
20th century --- the emergence of new synthetic polymer materials to more than billion tons annual production capacity of mankind to use the largest variety of materials. As the man entered the 21st century, synthetic materials in the face at least two challenges: First, as the main raw material for synthetic materials, oil has been drying up, man must find a substitute oil or raw materials can make up for the posite material systems; Second, now known as the "white pollution" problem is far from being solved, a lot of plastic waste incineration due to environmental pollution has a deeper impact on the earth's ecological balance. In this sense, a new type of biodegradable aliphatic polyester is likely to e a new environmental "green materials". The present study biodegradable polymers, there is a large class is polyester. Most of its main chain structural units by the aliphatic ester hydrolysis by easily made connections. Because of its main chain is delicate, so vulnerable to a variety of microbial or biological world in the position of animal enzymes, metabolism, ultimately generate carbon dioxide and water. Poly butylene inate (PBS) is one of a polyester high melting point, its performance is excellent with a