Application of ionic liquid [bmim]PF6 as green plasticizer for poly(L-lactide)

作者：Zhang Puyu^*; Peng Lichao; Li Wenbin

来源：E-Polymers, 2008, 8(1): 172.

DOI：10.1515/epoly.2008.8.1.1970

• ionic liquid
• poly(L-lactide)
• plasticizer
• crystallization

Ionic liquid [bmim]PF6 (1-butyl-3-methylimidazolium hexafluoro phosphate) was synthesized and characterized. It was used as the plasticizer for poly(L-lactide) (PLLA). The glass transition temperature (T-g) and the thermal stability of the plasticized PLLA samples were measured by thermogravimetry (TG) and differential scanning calorimetry (DSC). Compared with poly( ethylene glycol) having M-w of 300 g/mol (PEG(300)), TG results showed that the thermal stability of PLLA plasticized with ionic liquid was better than that of PLLA plasticized with PEG(300). The Tg of plasticized PLLA decrease with increasing the content of ionic liquid [bmim]PF6 from 2 wt.% to 10 wt.%. The T-g of PLLA can be reduced to 40 degrees C when the content of ionic liquid [bmim]PF6 was 10 wt.%. The materials of PLLA with plasticizer were also investigated using polarizing microscope (POM), the results of which indicate that the movements of PLLA chains were improved when ionic liquid plasticizer was used.

• 出版日期2008-12-28
• 单位河南大学