Citation: Dan-dan Wu, Wu Li, Yan Zhao, Yun-jiao Deng, Hui-liang Zhang, Hui-xuan Zhang, Li-song Dong. Thermal, Mechanical and Rheological Properties of Biodegradable Poly(propylene carbonate) and Poly(butylene carbonate) Blends[J]. Chinese Journal of Polymer Science, ;2015, 33(3): 444-455. doi: 10.1007/s10118-015-1597-z shu

Thermal, Mechanical and Rheological Properties of Biodegradable Poly(propylene carbonate) and Poly(butylene carbonate) Blends

Corresponding author: Hui-liang Zhang,
Received Date: 4 June 2014
Revised Date: 29 July 2014

Fund Project: This work was financially supported by the fund of Science Technology Bureau of Jilin Province of China (No. 20126023), the National High Technology Research and Development Program of China (863 Program) (No. 2012AA062904) and the National Natural Science Foundation of China (No. 51021003).

Poly(propylene carbonate) (PPC) was melt blended in a batch mixer with poly(butylene carbonate) (PBC) in an effort to improve the toughness of the PPC without compromising its biodegradability and biocompatibility. DMA results showed that the PPC/PBC blends were an immiscible two-phase system. With the increase in PBC content, the PPC/PBC blends showed decreased tensile strength, however, the elongation at break was increased to 230% for the 50/50 PPC/PBC blend. From the tensile strength experiments, the Pukanszky model gave credit to the modest interfacial adhesion between PPC and PBC, although PPC/PBC was immscible. The impact strength increased significantly which indicated the toughening effects of the PBC on PPC. SEM examination showed that cavitation and shear yielding were the major toughening mechanisms in the blends subjected the impact tests. TGA measurements showed that the thermal stability of PPC decreased with the incorporation of PBC. Rheological investigation demonstrated that the addition of PBC reduced the value of storage modulus, loss modulus and complex viscosity of the PPC/PBC blends to some extent. Moreover, the addition of PBC was found to increase the processability of PPC in extrusion. The introduction of PBC provided an efficient and novel toughened method to extend the application area of PPC.
- Biodegradable,
- Poly(propylene carbonate),
- Poly(butylene carbonate),
- Blends
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