Study on Application of Diacetylene-containing Copolyurethanes DA-coPUs) coating as strain sensors using Raman Spectroscopy
Abstract: A two-phase
copolymer DA-coPUs containing of 50% hard-segment has been prepared using a polyoxypropylene-diol
with molecular weight of 2000 (Voranol 2000), 4,4 -diphenylmethane diisocyanate
(MDI) and 2,4-hexadiyne-1,6-diol (HDD) via a one-shot, bulk polymerization
process. Solution of linear, as-prepared DA-coPUs in N,N-Dimethylacetamide
(DMAc) was coated onto pre-heated steel beam. Cross polymerization of the
DA-coPUs were carried out using heating under nitrogen at 100◦C for 5 hours.
Deforma-tion micromechanics of the DA-coPUs has been studied using simultaneous
4-point bending testing and Raman spectroscopy. The results showed that the
coating has poorer strain- induced Raman band shift factors than thatof pure
DA-coPUs [1]
Author: Widayani Sutrisno,
John L. Stanford, and Peter A. Lovell
Journal Code: jpfisikagg050001
