2Tessmar J,Mikos A G,Goepferich A. A new biodegradable polymer for the modification of surfaces:H2N- poly(ethylene glycol) - poly (D,L-lactide acid)[A]. Sixth world biomaterials congress transactions[C]. Hawaii:SFB,2000. 595.
3Pitt C G. Biodegradable polymers as drug delivery systems[ M]. New York: Marcel Dekker Inc, 1990.71 - 119.
4Song C X, Feng X D. Synthesis of ABA triblock copolymers of caprolactone and lactide[J ]. Macromolecular, 1984,17:2764- 2769.
5Grijpnma D W, Zondervan G J, Pennings A J. High molecular weight copolymers of L - lactide and ε - caprolactone as biodegradable elastomeric implant materials[ J ]. Polymer Bulletin, 1991,25 : 327 - 333.
6Ben M,Czapla B,Dobrzynski P. Copolymerization of glycolide and ε- caprolactone:2 randorn copolymerization in the presence of tin octoate[J]. Macromol Chem Phys, 1999,200:911 - 916.
7Wang S G, Qiu B. Polpcaprolactone - poly ( ethylene glycol ) block copolymer Ⅰ : Synthesis and degradability in vitro [J]. Poly Advanced Technologies, 1993,4 : 363 - 366.
8Holmes P A. Applications of PHB- a microbially produced biodegradable thermoplastic[J]. Phys Technol, 1985,16: 32 - 36.
9Miller N D, Williams D F. On the biodegradation of poly-β- hydroxybutyrate (PHB) homopolymer and poly- β - hydroxybutyrate -hydroxyvaleratee copolymers[J ]. Biomaterials, 1987,8:129 - 131.
10Cappello J. Genetic production of synthetic protein polymers[J]. MRS Bulletin, 1992,17:48 - 53.
