In:
Macromolecular Materials and Engineering, Wiley, Vol. 304, No. 1 ( 2019-01)
Abstract:
Linear polyurethanes based on poly( dl ‐lactic acid) (PDLLA) macrodiol are promising materials in tissue engineering, yet their synthesis requires rigorous control on various parameters. A facile way to prepare linear polyurethanes by capping the PDLLA macrodiol ( M n = 4536) with 2‐ureido‐4[1 H ]‐pyrimidone (UPy) is reported. The obtained low‐molecular‐weight UPy‐capped polyurethane can form flexible, stretchable, and hydrophobic supramolecular films due to the strong and unidirectional quadruple hydrogen bonding of UPy dimers. Tensile tests, shape recovery, and self‐healing observations indicate that, compared with conventional PDLLA macrodiol‐based linear polyurethane ( M n = 48840 and PDI = 1.8), the UPy‐capped polyurethane films have comparable mechanical properties (tensile modulus: 900 ± 38 MPa; ultimate strength: 9.6 ± 0.8 MPa) yet significantly better shape memory and self‐healing properties. These results suggest that the UPy‐capped polyurethane might become an alternative for conventional linear polyurethane as a new biomedical material.
Type of Medium:
Online Resource
ISSN:
1438-7492
,
1439-2054
DOI:
10.1002/mame.201800491
Language:
English
Publisher:
Wiley
Publication Date:
2019
detail.hit.zdb_id:
2004372-7
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