摘要
以癸二酸、丁二酸为二元酸,丁二醇为二元醇,通过熔融共聚的方式合成了聚(癸二酸丁二醇酯丁二酸丁二醇酯)无规共聚物(SE10)和聚丁二酸丁二醇(PBS),并通过酶解实验研究了相对分子质量、结构、表面形态的变化。通过红外光谱、差示量热扫描仪、偏光显微镜、凝胶色谱和扫描电镜对二者降解前后性能进行了研究,相比PBS,SE10晶体直径较小,晶体结构形态变模糊,结晶度由68.0%下降为45.7%,熔点由115.23℃下降为92.40℃。90d后SE薄膜的质量损失率达到63%,珚Mw由34700降为11500,而PBS质量损失率为27%,珚Mw由49000降为33000。表明癸二酸的引入降低了PBS的结晶性能,提高了其降解性能。
Novel poly(butylene succinate-co-butylene sebacate)(SE10) random copolyesters based on 1,4-succinic acid,1,4-butanediol and sebacic acid and poly(butylene succinate)(PBS) were synthesized by the thermal polycondensation. The products were characterized by IR,DSC,POM,GPC and SEM. The influence on crystallinity and degradability of the copolymers were studied. The surface morphology,molecular weight and structure change of the copolymer before and after enzymatic degradation were researched. Compared with that of PBS,the diameter of SE10 is smaller and the crystal structure configuration gets ambiguous. The crystallinity reduces from 68. 0%(PBS) to 45. 7%(SE10) and the melting point drops from 115. 23 ℃(PBS) to 92. 4 ℃(SE10). The mass loss rate of the SE10 film is 63% and 珚Mw of SE10 drops from 34700 to 11500 in 90 d,but the mass loss rate of PBS is 27% and 珚Mwdrops from 49000 to 33000. It indicates that the introduction of sebacic acid reduces the crystallization property and improves the degradation performance of the material.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第5期62-66,共5页
Polymer Materials Science & Engineering
关键词
癸二酸
聚丁二酸丁二醇酯
结晶性
降解
sebacic acid
poly(butylene succinate)
crystallinity
degradation
