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Citation: SU Xuan, HAN Chang-Yu, ZHUANG Yu-Gang, DONG Li-Song. Properties of Polylactide and Poly(Propylene Carbonate) Blends[J]. Chinese Journal of Applied Chemistry, ;2007, 24(4): 480-482. shu

Properties of Polylactide and Poly(Propylene Carbonate) Blends

SU Xuan ^a,b ,
HAN Chang-Yu ^a,b ,
ZHUANG Yu-Gang ^a ,
DONG Li-Song ^a,,

1.
a State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022;
2.
b Graduate School of Chinese Academy of Science, Beijing

Corresponding author: DONG Li-Song,
Received Date: 26 June 2006
Available Online: 8 November 2006

The blends of polylactide(PLA) and poly(propylene carbonate)(PPC) were prepared by melting blend.DSC results showed the glass transition temperature(T_g) of pure PLA and PPC were 54℃ and 37℃ respectively.Different compositions of PLA/PPC blend had two distinct T_g,which were corresponding to pure PLA and PPC,suggesting that PLA and PPC blend are immiscible.Mechanical test results showed when the content of PPC was up to 20%,the yielding point,necking and strain-whitening could be observed during tensile process.With the increasing of PPC content,fracture of blends had a transition from brittle nature to tough nature.Furthermore,with the increasing of PPC content,the modulus of blends decreased,and the elongation increased.When the composition of PPC reached 50%,the elongation of blend had a maximum value 62%.The complex viscosity of the blends can be controlled in a wide range.
- polylactide,
- poly(propylene carbonate)
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