Synergistic effect of boron containing substances on flame retardancy and thermal stability of intumescent polypropylene composites

A novel group of silsesquioxane derivatives, which are siloxane-silsesquioxane resins (S4SQ), was for the first time examined as possible flame retardants in polypropylene (PP) materials. Thermal stability of the PP/S4SQ composites compared to the S4SQ resins and neat PP was estimated using thermogravimetric (TG) analysis under nitrogen and in air atmosphere. The effects of the non-functionalized and n-alkyl-functionalized siloxane-silsesquioxane resins on thermostability and flame retardancy of PP materials were also evaluated by thermogravimetry-Fourier transform infrared spectrometry (TG-FTIR) and by cone calorimeter tests. The results revealed that the functionalized S4SQ resins may form a continuous ceramic layer on the material surface during its combustion, which improves both thermal stability and flame retardancy of the PP materials. This beneficial effect was observed especially when small amounts of the S4SQ fillers were applied. The performed analyses allowed us to propose a possible mechanism for the degradation of the siloxane-silsesquioxane resins, as well as to explain their possible role during the combustion of the PP/S4SQ composites.

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Improving the flame retardancy and thermal stability of polypropylene composites via introducing glycine intercalated kaolinite compounds

Applied Clay Science ◽

10.1016/j.clay.2022.106411 ◽

2022 ◽

Vol 217 ◽

pp. 106411

Author(s):

Wufei Tang ◽

Lixiang Song ◽

Fang Liu ◽

Wubliker Dessie ◽

Zuodong Qin ◽

...

Keyword(s):

Thermal Stability ◽

Flame Retardancy ◽

Polypropylene Composites ◽

Thermal Stability Of

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Synergistic effect of boron containing substances on flame retardancy and thermal stability of clay containing intumescent polypropylene nanoclay composites

Polymers for Advanced Technologies ◽

10.1002/pat.1650 ◽

2010 ◽

Vol 22 (12) ◽

pp. 1628-1632 ◽

Cited By ~ 24

Author(s):

Mehmet Doğan ◽

Erdal Bayramlı

Keyword(s):

Thermal Stability ◽

Synergistic Effect ◽

Flame Retardancy ◽

Thermal Stability Of

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Flame Retardancy, Thermal Stability, and Mechanical Properties of Sisal Fiber/Organoclay/Polypropylene Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.410.47 ◽

2011 ◽

Vol 410 ◽

pp. 47-50 ◽

Cited By ~ 1

Author(s):

Wichuda Chanprapanon ◽

Nitinat Suppakarn ◽

Kasama Jarukumjorn

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Maleic Anhydride ◽

Flame Retardancy ◽

Interfacial Adhesion ◽

Sisal Fiber ◽

Melt Blending ◽

Polypropylene Composites ◽

Pp Composites ◽

Thermal Stability Of

Composites based on polypropylene (PP) and sisal fiber (SF) were prepared by melt blending. Sisal fiber content was 30 phr. Organoclay (OMMT; Cloisite®30B) (1-7 phr) was incorporated into the composites. In addition, maleic anhydride grafted polypropylene (MAPP) was used as a compatibilizer to enhance the interfacial adhesion between PP matrix and sisal fiber and also to improve the dispersion of the organoclay in PP matrix. The addition of OMMT had insignificantly affected mechanical properties of SF/PP composites. However, flame retardancy and thermal stability of SF/PP composites were improved dramatically with the presence of OMMT.

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