A Versatile Equilibrium Method for the Synthesis of High-Strength, Ladder-like Polyphenylsilsesquioxanes with Finely Tunable Molecular Parameters.

作者信息

Ershova Tatyana O, Anisimov Anton A, Temnikov Maxim N, Novikov Maxim A, Buzin Mikhail I, Nikiforova Galina G, Dyuzhikova Yulia S, Ushakov Ivan E, Shchegolikhina Olga I, Muzafarov Aziz M

机构信息

A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991 Moscow, Russia.

Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Pr., 119991 Moscow, Russia.

出版信息

Polymers (Basel). 2021 Dec 18;13(24):4452. doi: 10.3390/polym13244452.

DOI:10.3390/polym13244452

PMID:34961003

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8705838/

Abstract

A versatile equilibrium method for synthesizing ladder-like polyphenylsilsesquioxanes (L-PPSQs) with various molecular weights (from 4 to 500 kDa) in liquid ammonia was developed. The effect of diverse parameters, such as temperature, monomer concentration, reaction time, addition or removal of water from the reaction medium, on the polycondensation process was determined. The molecular weight characteristics and structure of the L-PPSQ elements obtained were determined by GPC, H, Si NMR, IR spectroscopy, viscometry, and PXRD methods. The physicochemical properties of L-PPSQs were determined by TGA and mechanical analyses.

摘要