Lau, C. maggie published the artcileStructural Basis for the Different Mechanical Behaviors of Two Chemically Analogous, Carbohydrate-Derived Thermosets, COA of Formula: C17H28O8S4, the main research area is behavior analogous carbohydrate thermoset.
Two renewable, structurally analogous monomers, isosorbide undecenoate (IU) and glucarodilactone undecenoate (GDLU) reacted with pentaerythritol tetrakis(3-mercaptopropionate) (PETT) via thiol-ene photopolymerization to form IU-PETT and GDLU-PETT thermosets. Despite their chem. similarity, uniaxial tensile testing showed that GDLU-PETT exhibited a strain-hardening behavior and is significantly tougher than IU-PETT. To understand this observation, in situ tensile testing and wide- angle X-ray scattering experiments (WAXS) were conducted. While the 2D WAXS patterns of IU-PETT displayed an isotropic halo during uniaxial deformation, they exhibited a change from an isotropic halo to a pair of scattering arcs for the GDLU-PETT samples. D. functional theory calculations further revealed that the alkyl chains on GDLU adopt a linear conformation while the alkyl chains on IU are angled. Based on these results, we postulate that the linear GDLU mols. can more easily order and align during uniaxial deformation, hence increasing intermol. interactions between the GDLU mols. and contributing to the observed strain hardening behavior of their thermosets. This study exemplifies how mols. with subtle differences in their chem. structures can alter the structures and thermophys. properties of the resulting polymers in unpredictable ways.
ACS Macro Letters published new progress about Crosslink density. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, COA of Formula: C17H28O8S4.
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts