Karabanova, L. V.; Honcharova, L. A.; Shtompel, V. I. published the artcile< Structure and Properties of the POSS-Containing Nanocomposites Based on Polyurethane Matrix>, Category: esters-buliding-blocks, the main research area is polyurethane polyhedral oligomeric silsesquioxane nanocomposite structure property.
Nanocomposites based on Polyurethane (PU) matrix and 1,2-propanediolisobutyl-POSS (POSS) nanoparticles were prepared and investigated. POSS nanoparticles were incorporated into PU matrix in the process of PU synthesis. The structure peculiarities, the dynamic mech. and thermal properties, the morphol. of the nanocomposites have been investigated. Overall, it was found that POSS nanoparticles are capable to be incorporated into PU polymer chain by a chem. reaction between hydroxyl groups of POSS and diisocyanate groups of PU. The incorporation of the POSS nanoparticles into PU matrix leads to the formation of a more ordered structure, the POSS acts as a nanostructuring agent in the system. The introduction of the POSS nanoparticles into PU matrix significantly affects the thermal properties of the nanocomposites: the increasing in thermal stability was found. Investigation by WAXS/SAXS methods has shown that nanofiller POSS slightly affects the amorphous structure of PU. However, to a greater extent, the nanofiller POSS affects the microphase structure of PU. By dynamic mech. anal., it was detected that the storage moduli of PU/POSS nanocomposites exceeds the storage modulus of PU. But Mn/Mo changes non-monotonically with POSS content. The storage modulus of the nanocomposites increases in 1, 5 times compared to the native PU for the nanocomposites contained from 1 to 5 weight% of POSS. From the morphol. investigation, it is obvious that POSS introduced into PU matrix acts as nanostructuring agent. As a result, the nanocomposites with more ordered structure are formed thus leading to materials with improved thermal stability.
Springer Proceedings in Physics published new progress about Complex modulus, tan δ. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics