Cage-ladder-structure, phosphorus-containing polyhedral oligomeric silsesquinoxanes as promising reactive-type flame retardants for epoxy resin

2019 ◽  
Vol 136 (23) ◽  
pp. 47607 ◽  
Author(s):  
Shengnan Li ◽  
Xiaojuan Zhao ◽  
Xinghua Liu ◽  
Xin Yang ◽  
Ran Yu ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Flame Retardants ◽  
Ladder Structure ◽  
Phosphorus Containing

scholarly journals Phosphorus-Containing Silsesquioxane Derivatives as Additive or Reactive Components of Epoxy Resins

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5373
Author(s):  
Mariusz Szołyga ◽  
Michał Dutkiewicz ◽  
Marek Nowicki ◽  
Kamila Sałasińska ◽  
Maciej Celiński ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Hybrid Materials ◽  
Flame Retardants ◽  
Epoxide Ring ◽  
Cone Calorimetry ◽  
Scanning Calorimetry ◽  
Water Contact ◽  
Phosphorus Containing ◽  
The Impact ◽  
Phosphate Groups

Two phosphorus-containing cage-like silsesquioxane derivatives were synthesized as reactive or additive flame retardants for epoxy resin. The silsesquioxanes were obtained via an epoxide ring-opening reaction using a 10-hydroxy-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPA). In one derivative containing in its structure 4 glycidoxypropyl and 4 phosphate groups, denoted as 4P4GS, only half of the epoxy rings was reacted with phosphate to obtain a reactive additive, while in the second derivative containing 8 phosphate groups, denoted as 8PS, all epoxy groups were converted, thus an additive modifier was obtained. The silsesquioxanes containing phosphorus atoms and the reactive phosphorus-free silsesquioxane derivative (octakis[(3-glycidoxypropyl)dimethylsiloxy]octasilsesquioxane (8GS)) were used to prepare hybrid materials based on epoxy resin. To compare the impact of the structure of silsesquioxane derivatives on the properties of hybrid materials, a number of samples containing 1, 5, and 10% of the modifiers making a series of epoxy materials containing additive or reactive modifiers, were obtained. The modified epoxies were studied using scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDS), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), nanoindentation, water contact angle, and cone calorimetry tests to assess the effects of the modifier structure on the physicochemical properties of the investigated materials.

scholarly journals A bio-based phosphaphenanthrene-containing derivative modified epoxy thermosets with good flame retardancy, high mechanical properties and transparency

RSC Advances ◽  
2021 ◽  
Vol 11 (49) ◽  
pp. 30943-30954
Author(s):  
Wei Peng ◽  
Yu-xuan Xu ◽  
Shi-bin Nie ◽  
Wei Yang
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Epoxy Resins ◽  
Flame Retardants ◽  
The Past ◽  
Phosphorus Containing ◽  
Modified Epoxy

Phosphorus-containing flame retardants have received huge interest for improving the flame retardant behavior of epoxy resins (EP) over the past few decades.

Novel organophosphorus flame retardants and their synergistic application in novolac epoxy resin

2018 ◽  
Vol 158 ◽  
pp. 190-201 ◽  
Author(s):  
Christian Schmidt ◽  
Michael Ciesielski ◽  
Lara Greiner ◽  
Manfred Döring
Keyword(s):  
Epoxy Resin ◽  
Flame Retardants ◽  
Organophosphorus Flame Retardants ◽  
Novolac Epoxy

Novel phosphorus-containing silazanes as flame retardants in epoxy resins

2021 ◽  
pp. 105120
Author(s):  
Philipp Kukla ◽  
Lara Greiner ◽  
Sebastian Eibl ◽  
Manfred Döring ◽  
Frank Schönberger
Keyword(s):  
Epoxy Resins ◽  
Flame Retardants ◽  
Phosphorus Containing
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