Synthesis and characterization of polycaprolactone-based segmented polyurethanes

Authors

AYSUN GÜNEY
AYSEL KIZILTAY
NESRİN HASIRCI
TUĞBA ENDOĞAN TANIR

DOI

10.3906/kim-1801-44

Abstract

Segmented polyurethanes were synthesized by the reactions of poly($\varepsilon $-caprolactone) (PCL)-diol and 1,6-hexamethylene diisocyanate through bulk polymerization without using solvent, initiator, or catalyst. Phase separation and hydrogen bond formation between hard segments or between hard and soft segments were examined by Fourier transform infrared spectroscopy (FTIR)-ATR and X-ray diffraction (XRD), while physical and mechanical properties were studied by atomic force microscope, differential scanning calorimeter, dynamic mechanical analysis, and tensile tester. When the diisocyanate content was increased, deconvolution results of FTIR-ATR in C$=$O and N-H regions demonstrated better miscibility of the segments and XRD results showed a significant decrease in the crystallinity of soft segments. Samples having strong hard segment interactions displayed better mechanical properties.

Keywords

Segmented polyurethanes, poly($\varepsilon $-caprolactone)-diol, hard segment, phase segregation, deconvolution

First Page

452

Last Page

463

Recommended Citation

GÜNEY, AYSUN; KIZILTAY, AYSEL; HASIRCI, NESRİN; and TANIR, TUĞBA ENDOĞAN (2019) "Synthesis and characterization of polycaprolactone-based segmented polyurethanes," Turkish Journal of Chemistry: Vol. 43: No. 2, Article 7. https://doi.org/10.3906/kim-1801-44
Available at: https://journals.tubitak.gov.tr/chem/vol43/iss2/7