Abstract
The viscoelastic properties of polymer blends of poly(glycerol sebacate) (PGS) and poly(butylene succinate-dilinoleate) (PBS-DLA) copolymer intended for cardiac tissue patches are investigated by dynamic flat punch nanoindentation at frequencies ranging from 1 to 45 Hz. The storage modulus is found to depend weakly on the testing frequency, the lowest value being for 1 Hz, which corresponds to the usual heart rate. More significantly, it is found that varying the PGS content between 40 and 70 wt% allows tuning the storage modulus of the blends between 11 and 39 MPa. The reliability of the nanoindentation method is validated by reference dynamic mechanical measurements on thicker PBS-DLA samples using a tensile testing machine.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 115-118 |
| Number of pages | 4 |
| Journal | Materials Letters |
| Volume | 221 |
| DOIs | |
| State | Published - Jun 15 2018 |
Keywords
- Cardiac tissue engineering
- Dynamic mechanical analysis
- Nanoindentation
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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