Research progress in alkyl hypophosphite synergistic systems

doi:10.19491/j.issn.1001-9278.2022.02.025

Abstract

Abstract:

This review introduced the flame?retardant mechanism of alkyl phosphinates and summarized the latest research progress in the alkyl phosphinate flame?retardant compound systems. These compound systems included the alkyl phosphinate and phosphorus flame retardants， nitrogen flame retardants， silicon flame retardants， carbon?based materials， inorganic metal flame retardants， and chain?extender?containing flame?retardant polymer. The development trend in alkyl hypophosphonate synergistic system was finally prospected.

Key words: alkyl hypophosphite, flame retardant, retardant mechanism, synergistic system

CLC Number:

TQ314.24⁺8

TIAN Baozheng. Research progress in alkyl hypophosphite synergistic systems[J]. China Plastics, 2022, 36(2): 197-208.

Figures/Tables 10

Fig.1. Structure of alkyl hypophosphite

Fig.2. Fire retardant mechanism in gas phase

Fig.3. Phosphorous?containing retardants for synergism systems

Fig.4. Deduced decomposition route of DPOH［20］

Fig.5. Nitrogen?containing retardants for synergism system

Fig.6. Photographs of char residue of different materials［31］

Fig.7. Chemical structure of OM?POSS

Fig.8. Synergistic mechanism of ADEP with EG［46］

Fig.9. Flame?retardant polymers for synergism system

Fig.10. Chain extenders for synergism system

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