Viscoelastic and mechanical properties of vinyl ester (VE)/multifunctional polyhedral oligomeric silsesquioxane (POSS) nanocomposites and multifunctional POSS–styrene copolymers

Vapor Grown Carbon Fiber/Hybrid Organic-Inorganic Matrix Composites. Nanometer-sized Silsesquiozane Phase Chemically Bound in a Matrix

“…4 The mole percents of POSS-1 in these two composites are low (<0.5% and <1%, respectively) due to the high mass of POSS-1 (mwt=1305). VE composites of two nonfunctional POSS-3 (octaisobutyl POSS) and POSS-4 (dodecaphenyl POSS) derivatives were also prepared with 95/5 wt/wt compositions.…”

“…4 TEM, EDXS, EELS and extraction studies suggest that some POSS-i-rich nanoparticles in the VE/POSS-1 90/10 composite are present and also a fraction of the POSS-1 is molecularly dispersed within the VE resin. The POSS-1-rich dispersed phase portion is crosslinked, insoluble and contains some VE.…”

“…POSS/vinyl ester composites. 4 How would POSS chemicals disperse? How would potential chemical reactions occur versus phase separation?…”

“…Vinyl ester (VE) composites containing chemically bonded, multifunctional polyhedral oligomeric silsesquioxane (POSS), POSS-1, ((C 6 H 5 CHCHO) 4 (SisO1 2 )(CH=CHC 6 H 5 ) 4 ) nanoparticles were prepared with VE/POSS-1 95/5 and 90/10 wt/wt ratios. 4 The mole percents of POSS-1 in these two composites are low (<0.5% and <1%, respectively) due to the high mass of POSS-1 (mwt=1305).…”

Synthesis of a Polyhedral Oligomeric Silsesquioxane (POSS) containing Phenyl and DOPO (7Ph-T7-DOPO) and its thermal stability

“…These compounds can be represented as (RSiO 1.5 )n, where n is an even number (n ≥ 6), R is hydrogen or any alkyl, alkylene, aryl, arylene, or organofunctional derivative of alkyl, alkylene, arylene groups, and Si-O is the inorganic key [3,4]. Considering that the side group R can result in a diverse array of silsesquioxanes [5], organic-inorganic hybrid materials can facilitate development of high-performance materials that combine the desirable properties of conventional organic and inorganic components; such properties include thermal stability, solubility, and processability [6].…”