Octakis(dimethylsiloxypropylglycidylether)silsesquioxane (OG-POSS) reinforced 1,1-bis(3-methyl-4-hydroxymethyl)cyclohexane based polybenzoxazine nanocomposites

Abstract

Octakis(dimethylsiloxypropylglycidylether)silsesquioxane (OG-POSS) was used as a reinforcing agent to prepare polybenzoxazine nanocomposites. Benzoxazine was synthesized using 1,1-bis(3-methyl-4-hydroxyphenyl) cyclohexane, paraformaldehyde and two distinctive aromatic diamines, namely 4,4′-diaminodiphenylmethane (DDM) and 4,4′-diaminodiphenylether (DDE) through Mannich condensation. Polybenzoxazine-POSS hybrid nanocomposites were prepared by ring opening polymerization via thermal curing using benzoxazine precursors and OG-POSS (up to 10 wt %). Thermogravimetric analysis indicate that the nanocomposites display improved thermal stability. Morphological characteristic was studied by scanning electron microscopy. The dispersion of POSS in polybenzoxazine and nanostructure of the composites were confirmed by confocal optical microscopy (COM), transmission electron microscopy (TEM) and atomic force microscopic (AFM) analysis.

Examining the thermal behaviour of novel aromatic polybenzoxazine blends containing an organophosphorous compound and polyhedral oligomeric silsesquioxane reagents

“…The preparation of PBZs incorporating functionalised POSS reagents dates from 2004, and, in common with other families of high‐performance polymers, there has been a steady growth in interest in the use of both mono‐ and polyfunctional POSS reagents with PBZs with several research groups concentrating on their exploration. Common approaches have utilised appropriately functionalised POSS reagents to effect co‐reaction with the oxazine ring, such as vinyl groups and glycidyl ethers . Alongside the more numerous studies examining the effects of blending POSS with PBZ and its blends or copolymers such as bisoxazolines or epoxies is the use of benzoxazines as pendant groups within more flexible fluoropolymer films .…”

Effect of octa(epoxycyclohexyl) POSS on thermal, rheology property, and foaming behavior of PLA composites

“…reported T g value of matrix increased with addition of Octakis(dimethylsiloxypropylglycidylether) silsesquioxane (ogPOSS) . The increase in the value of T g was interpreted on the basis of the reinforcement of POSS cages on polymer matrices, which could restrict the motion of macromolecular chains and can cause additional crosslinking of the nanocomposites resulting from the intercomponent reaction between Octakis(dimethylsiloxypropylglycidylether) (OG) and Polybenzoxazine‐cyclohexane‐4, 4′‐diaminodiphenylmethane/polybenzoxazine ‐ cyclohexane ‐4, 4′‐diaminodiphenylether (PBZ‐Cy‐DDM/PBZ‐Cy‐DDE) . Yari et al .…”

Synthesis of branched benzoxazine monomers with high molecular mass, wide processing window, and properties of corresponding polybenzoxazines

“…Benzoxazine‐based organic–inorganic hybrid network structures have also received great interest due to their unique structural, thermal, and mechanical properties. Polyhedral oligomeric silsesquioxane (POSS) was introduced into a polybenzoxazine structure by chemical bonding, resulting in polybenzoxazine/POSS hybrids with high thermal stability and excellent dielectric properties . Functionalization of multiwalled carbon nanotubes (MWCNTs) has been carried out using reactive benzoxazine, and the final hybrids showed high electrical conductivity and good mechanical strength .…”