PMID: 11334188May 4, 2001Paper

Copolymers of trimethylene carbonate and epsilon-caprolactone for porous nerve guides: synthesis and properties

Journal of Biomaterials Science. Polymer Edition
A P PêgoJ Feijen

Abstract

Copolymers of trimethylene carbonate and epsilon-caprolactone were synthesized and characterized with the aim of assessing their potential in the development of a flexible and slowly degrading artificial nerve guide for the bridging of large nerve defects. The effect of the monomer ratio on the physical properties of the polymers and its influence on the processability of the materials was investigated. Under the applied polymerization conditions (130 degrees C, 3 days using stannous octoate as a catalyst) high molecular weight polymers (Mn above 93 000) were obtained. All copolymers had glass transition temperatures below room temperature. At trimethylene carbonate contents higher than 25 mol% no crystallinity was detected. A decrease in crystallinity resulted in the loss of strength and decrease in toughness, as well as in an increased polymer wettability. Amorphous poly(trimethylene carbonate), however, showed excellent ultimate mechanical properties due to strain-induced crystallization (Tm = 36 degrees C). Low crystallinity copolymers could be processed into dimensionally stable porous structures by means of immersion precipitation and by combination of this technique with the use of porosifying agents. Porous membranes of...Continue Reading

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Citations

Jan 10, 2009·Journal of Materials Science. Materials in Medicine·Mingzhu Sun, Sandra Downes
Apr 10, 2013·Acta Biomaterialia·Congcong ZhuChristopher J Bettinger
Mar 6, 2003·Journal of Controlled Release : Official Journal of the Controlled Release Society·Ana Paula PêgoJan Feijen
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