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Citation: Liu Li, Li Chenxi, He Binglin. Preparation of Biodegradable Polymer Nanoshphere[J]. Chinese Journal of Applied Chemistry, ;1999, 16(5): 69-72. shu

Preparation of Biodegradable Polymer Nanoshphere

1.
State Key Laboratory of Functional Polymer Materials for Adsorption and Separation, Institute of Polymer Chemistry, Nankai University, Tianjin 300071

Received Date: 13 April 1999
Available Online: 28 July 1999
Fund Project: 教育部博士点基金(98005504) (98005504)

Biodegradable triblock copolymers were prepared from d,l lactide and poly(ethylene glycol) by bulk ring opening polymerization. The compositions and molecular weights of the copolymers were determined by ¹H NMR. Keeping the molecular weight of PLA segment constant, the water adsorption capacity of the copolymer films increased with the increase of the molecular weight and content of PEG segment in copolymer. The PLA/PEG/PLA triblock copolymer could be degraded in phosphate buffer solution(pH=7.4) at 37℃ in 60 days. The spherical copolymer nanospheres with narrow unimodal size distribution 103 6~141 6 nm were prepared by one step emulsion method. Their sizes were influenced by PLA chain length and PEG chain length.
- polylactide,
- poly(ethylene glycol)i,
- triblock copolymer,
- preparation,
- nanosphere,
- biodegradable polymer
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