TY - JOUR
T1 - Mechanoluminescent imaging of Osmotic stress-induced damage in a glassy polymer network
AU - Clough, J.M.
AU - van der Gucht, J.
AU - Sijbesma, R.P.
PY - 2017/3/14
Y1 - 2017/3/14
N2 - A chemiluminescent mechanophore, bis(adamantyl-1,2-dioxetane), is used to investigate the covalent bond scission resulting from the sorption of chloroform by glassy poly(methyl methacrylate) (PMMA) networks. Bis(adamantyl)-1,2-dioxetane units incorporated as cross-linkers underwent mechanoluminescent scission, demonstrating that solvent ingress caused covalent bond scission. At higher cross-linking densities, the light emission took the form of hundreds of discrete bursts, widely varying in intensity, with each burst composed of 107–109 photons. Camera imaging indicated a relatively slow propagation of bursts through the material and permitted analysis of the spatial correlation between the discrete bond-breaking events. The implications of these observations for the mechanism of sorption and fracture are discussed.
AB - A chemiluminescent mechanophore, bis(adamantyl-1,2-dioxetane), is used to investigate the covalent bond scission resulting from the sorption of chloroform by glassy poly(methyl methacrylate) (PMMA) networks. Bis(adamantyl)-1,2-dioxetane units incorporated as cross-linkers underwent mechanoluminescent scission, demonstrating that solvent ingress caused covalent bond scission. At higher cross-linking densities, the light emission took the form of hundreds of discrete bursts, widely varying in intensity, with each burst composed of 107–109 photons. Camera imaging indicated a relatively slow propagation of bursts through the material and permitted analysis of the spatial correlation between the discrete bond-breaking events. The implications of these observations for the mechanism of sorption and fracture are discussed.
UR - http://www.scopus.com/inward/record.url?scp=85015204585&partnerID=8YFLogxK
U2 - 10.1021/acs.macromol.6b02540
DO - 10.1021/acs.macromol.6b02540
M3 - Article
C2 - 28316344
SN - 0024-9297
VL - 50
SP - 2043
EP - 2053
JO - Macromolecules
JF - Macromolecules
IS - 5
ER -