Zhang, H. J.’s team published research in Journal of Physical Chemistry B in 124 | CAS: 1761-71-3

Journal of Physical Chemistry B 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 0, COA of Formula: C13H26N2.

Zhang, H. J. published the artcileEffect of Free-Volume Hole Fraction on Dynamic Mechanical Properties of Epoxy Resins Investigated by Pressure-Volume-Temperature Technique, COA of Formula: C13H26N2, the publication is Journal of Physical Chemistry B (2020), 124(9), 1824-1832, database is CAplus and MEDLINE.

Dynamic mech. anal. experiments were carried out to investigate the mech. properties of four types of chem. different epoxy resins. Pressure-volume-temperature (PVT) experiments were performed to determine the free-volume hole fraction (hPVT) of each epoxy resin using the Simha-Somcynsky lattice-hole theory. Using the Williams-Landel-Ferry equation, the correlations between the relative hole fraction (1 – hPVTTr/hPVT, where hPVTTr is the hole fraction at a reference temperature Tr) and four typical parameters reflecting dynamic mech. properties [storage modulus (E’), loss modulus (E”), damping factor (tanδ), and complex viscosity (|η*|)] were studied at from Tg(PVT) (the glass transition temperature determined by PVT data) to Tg(PVT) + 100°C. At from Tg(Eonset‘) (temperature corresponding to the intersection of the two tangent fitting lines in the E'(T) curve indicating the glassy-state and glass-transition stages) to Tg(PVT) + 100°C, the variations in the four dynamic mech. parameters with a relative hole fraction could be separated into two distinct categories: (i) log[E'(T)] and log[|η*|(T)] decreased linearly to their min. values and then remained nearly unchanged with increasing relative hole fraction, and (ii) log[E”(T)] and log[tanδ(T)] first increased monotonically to their maximum values and then decreased linearly with the increasing relative hole fraction. This study demonstrates that the PVT technique is a feasible and reliable exptl. method to determine the hole fractions of thermoset polymers.

Journal of Physical Chemistry B 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 0, COA of Formula: C13H26N2.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider