Zhang, H. J. published the artcileEffect of free-volume holes on static mechanical properties of epoxy resins studied by positron annihilation and PVT experiments, Quality Control of 1761-71-3, the publication is Polymer (2020), 122225pp., database is CAplus.
The tensile, flexural, and fracture toughness properties of seven chem. different amine-cured epoxy resins were studied. Positron annihilation lifetime and pressure-volume-temperature (PVT) experiments were performed on each epoxy resin to characterize the average size and fraction, resp., of free-volume holes. A neg. correlation between hole fraction and hole size was revealed for these chem. different epoxy resins. Better tensile and flexural mech. properties (higher tensile modulus and lower tensile strain at break; higher flexural modulus, higher flexural strength, and lower flexural strain at break) were clearly observed for epoxy resins with smaller hole size and higher hole fraction. However, no clear relationship between fracture toughness and hole properties was found. The correlations between (tensile and flexural) static mech. properties and hole properties for chem. different epoxy resins should provide guidance for further improvements in the mech. properties of carbon fiber-reinforced polymers.
Polymer published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C18H20N2O12, Quality Control of 1761-71-3.
Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider