摘要
以辛酸亚锡为催化剂,合成了己内酯预聚物(PCL),再与乙交酯(GA)熔融共聚,制备了嵌段型己内酯乙交酯共聚物(PCL/GA)。利用GPC、FT-IR、1H-NMR和13C-NMR等对PCL/GA的结构进行了表征,确认合成的共聚物为嵌段型聚酯共聚物。利用XRD和DSC测试了PCL/GA的结晶状态和热学性能,测试发现合成的共聚物均为结晶型聚合物,且结晶情况与单体组成有关,利用石英微晶天平考察了PCL/GA(80/20)在海水中的水解行为,发现前3 h聚酯降解速率波动较大,推断是由于初期嵌段聚酯吸水与降解作用同时进行所致,随着吸水作用的完成,后期嵌段聚酯的降解速率维持在80 ng/(cm2.h)左右,降解速率稳定。利用POM、SEM观察了水解过程中薄膜结晶及形貌变化。
With stannous ocIoate as a catalyst, caprolactone prepolymers（PCL） was synthesized, which was then mehcn copolymerized with glycolide（ GA ） to prepare tire block copnlymer of caprolactone glycolide （PClJGA）. The structure of the PCI/GA were characterized by GPC, FT-IR, 1H -NMR and ^13C - NMR, confirming tire block stn, cture of the copolymer. The crystallization state and thermal properties of the PCL/GA was tested by XRD and DSC. It was found that all tire prepared eopolymers were crystalline poly- mers and tire crystallization behavior was related with monomer composition. The hydrolysis behavior of the PCI/GA （80/20） in seawater was investigated by use of QCM - D. It was found that the hydrolysis rate of the polyester flucluated in the first three hours, which was inferred due to the simultaneous absorbent and hy- drolysis of tire polyerter at initial stage. With the completion of the water absorption, the hydrolysis rate of the block polyester was maintained at about 80 ng/（cm2·h） stably. Crystallinity and the morphology chan- ges of the film in the hydrolysis process was characterizationed by POM and SEM.
出处
《涂料工业》
CAS
CSCD
北大核心
2013年第3期5-11,共7页
Paint & Coatings Industry
基金
国家重点基础研究发展计划(973计划)(613109)
