Flame Retardancy of Polysiloxane Solid Powder Combined with Organophosphate in Polycarbonate

Zhou, Wenjun; Chen, Ke; He, Weizhuang

doi:10.1051/matecconf/20166706029

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…In the initial combustion stage, the PDPSI early decomposed to produce phosphoric acid, which promoted the aromatization reaction of PET, thereby forming a carbon layer and covering on the matrix surface to protect the underlying substrate from being burned. Meanwhile, in addition to self‐dehydration condensation under the catalysis of phosphoric acid, the terminal SiOH of PDPSI also undergone dehydration condensation reaction with the end OH of PET molecular chain to form an interpenetrating network structure, which improved the continuity and compactness of the carbon layer . The PO bond unit produced by the phosphoric acid group can also be bonded to the reflection point of the carbon layer surface with an oxidation tendency, so that the carbon layer is passivated to reduce the permeability.…”

Section: Resultsmentioning

confidence: 99%

Preparation of a novel phosphorus‐containing organosilicon and its effect on the flame retardant and smoke suppression of polyethylene terephthalate

Peng

Xue

Song

et al. 2019

Polymers for Advanced Techs

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A novel phosphorus‐containing silicone flame retardant (PDPSI) was prepared by Mannish reaction, and a series of PDPSI/PET composites were prepared by melt blending method. The nuclear magnetic resonance (1H NMR), Fourier transformation infrared (FTIR), and the thermogravimetric analyzer (TGA) results indicated that PDPSI showed network structure and owned good thermal stability, with the char residue of 62.2% at 800°C. The flame retardancy of PDPSI/PET composites was characterized by limiting oxygen index (LOI), vertical burning tests (UL‐94), and cone calorimeter (CCT). The results revealed that the addition amount of PDPSI was 5%, the LOI value of PDPSI/PET composites increased to 27.3%, and UL‐94 test passed V‐0 rating. When the PDPSI loading was 3%, PET composites showed excellent flame retardancy and smoke suppression, with a decrease in the peak heat release rate (PHRR) by 71.19% and the total smoke release (TSP) reduced from 14.4 to 11.1m2. The scanning electron microscopy (SEM) and FTIR results of char residue demonstrated that the flame‐retardant mechanism of PDPSI was solid phase flame retardant. PDPSI catalyzed the aromatization reaction of PET to promote the formation of a dense and continuous carbon layer, finally improving the flame retardancy and smoke suppression properties of PET.

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Section: Resultsmentioning

confidence: 99%