摘要
采用带支链的N-甲基二乙醇胺(MDEA)参与PBS共聚,得到了分子主链中含氮基团的新型共聚物P(BS-co-MDEA)。采用1H-NMR表征了新型共聚物的化学结构,并对共聚物的结晶性、热性能和力学性能进行了研究。结果表明:1H-NMR证明了得到的产物是P(BS-co-MDEA);其晶型结构和PBS相似,但随着MDEA用量的添加,晶体尺寸增大,θg和θd都有所降低;但θd-5%仍在300℃左右,说明具有良好的热稳定性;共聚物的断裂伸长率有所提高。相比PBS,脂肪酶N435对P(BS-co-MDEA)的降解作用明显减小,对于长效降解,控制其降解速度具有一定的意义。
The novel PBS-based copolymer P （ BS-co-MDEA） containing nitrogen group was obtained by N-methyl diethanolamine （MDEA） added in the main chain of PBS. Their chemical structure was characterized by 1 H-NMR. The crystallinity, thermal properties and mechanical properties were also analyzed. The results showed that the desired products P （BS-co-MDEA） were achieved by 1 H-NMR. Their crystal structure remained the same with PBS. With the increasing of MDEA, the size of crystallites increased, both of the θg and θd of the copolymers decreased. The thermal decomposition temperature kept around 300℃ with the 5 % mass loss. It indicated that the copolymers had good thermal stability. Elongation rate of copolymers was improved. Compared with PBS, the degradation rate of P（ BS-co-MDEA） in lipase N435 was slower. It had certain significance for long-term degradation and controlling PBS-based copolymers＇ degradation speed.
出处
《塑料》
CAS
CSCD
北大核心
2014年第1期11-14,66,共5页
Plastics
基金
陕西科技大学科研启动基金(BJ09-08)
陕西科技大学创新科研团队基金(TD10-01)
