Citation: Yan Zhang, Bing Tao Wang, Zheng Hong Guo, Jie Chen, Zheng Ping Fang. Preparation and characterization of biodegradable aliphatic-aromatic copolyesters/nano-SiO ₂ hybrids via In situ melt polycondensation[J]. Chinese Chemical Letters, ;2009, 20(11): 1348-1352. doi: 10.1016/j.cclet.2009.05.013 shu

Preparation and characterization of biodegradable aliphatic-aromatic copolyesters/nano-SiO ₂ hybrids via In situ melt polycondensation

a Lab of Polymer Materials and Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;
b Institute of Polymer Composites, Zhejiang University, Hangzhou 310027, China

Received Date: 10 March 2009

Fund Project: Financial support from the Natural Science Foundation of Ningbo (No. 2007A610030) and Science and Technology Department of Zhejiang Province (No. 2008C11092-2) are greatly acknowledged.

In situ melt polycondensation was proposed to prepare biodegradable aliphatic-aromatic copolyesters/nano-SiO ₂hybrids based on terephthalic acid (TPA), poly(L-lactic acid) oligomer (OLLA), 1,4-butanediol (BDO) and nano-SiO ₂. TEM and FT-IR characterizations confirmed that TPA, OLLA and BDO copolymerized to obtain biodegradable copolyesters, poly(butyleneterephthalate-co-lactate) (PBTL), and the abundant hydroxyl groups on the surface of nano-SiO ₂ provided potential sites for In situ grafting with the simultaneous resulted PBTL. The nano-SiO ₂ particles were chemically wrapped with PBTL to form PBTL/nano- SiO₂hybrids. Due to the good dispersion and interfacial adhesion of nano-SiO ₂ particles with the copolyester matrix, the tensile strength and the Young's modulus increased from 5.4 and 5.6 MPa for neat PBTL to 16 and 390 MPa for PBTL/nano-SiO ₂ hybrids with 5 wt.% nano-SiO ₂, respectively. The mechanical properties of PBTL/nano-SiO ₂ hybrids were substantially improved.
- Biodegradable aliphatic-aromatic copolyesters,
- PBTL/nano-SiO ₂ hybrids,
- In situ melt polycondensation
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