Thermal, mechanical and rheological properties of biodegradable poly(propylene carbonate) and poly(butylene carbonate) blends

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• 作者：Dan-dan Wu (1) (2)
  Wu Li (1) (2)
  Yan Zhao (1) (2)
  Yun-jiao Deng (1)
  Hui-liang Zhang 寮犱細鑹?/a> (2)
  Hui-xuan Zhang (1)
  Li-song Dong (2)
  
  1. Changchun University of Technology ; Changchun ; 130012 ; China
  2. Laboratory of Polymer Ecomaterials ; Chinese Academy of Sciences ; Changchun Institute of Applied Chemistry ; Changchun ; 130022 ; China
  
• 关键词：Biodegradable ; Poly(propylene carbonate) ; Poly(butylene carbonate) ; Blends
• 刊名：Chinese Journal of Polymer Science
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：33
• 期：3
• 页码：444-455
• 全文大小：1,809 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Condensed Matter Physics
  Industrial Chemistry and Chemical Engineering
  Polymer Sciences
  Characterization and Evaluation of Materials
  
• 出版者：Chinese Chemical Society and Institute of Chemistry, CAS, co-published with Springer
• ISSN：1439-6203

文摘

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.