How Phosphorous Flame Retardant Additives Affect Benzoxazine‐Based Monomer and Polymer Properties

Autor: Thorben S. Haubold, Nick Wolter, Anna Sandinge, Per Blomqvist, Bernd Mayer, Katharina Koschek
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Macromolecular Materials and Engineering, Vol 308, Iss 11, Pp n/a-n/a (2023)
Druh dokumentu: article
ISSN: 1439-2054
1438-7492
DOI: 10.1002/mame.202300132
Popis: Abstract The phosphorous‐based flame retardant additives poly(m‐phenylene methylphosphonate) (PMP) and resorcinol bis(diphenyl phosphate) (RDP) are reacted with bisphenol F and aniline–based benzoxazine (BF‐a). DSC, rheological analysis, FT‐IR, and soxhlet extraction reveal the covalent incorporation of both FR additives—initiating phenols in PMP structure as well as free phenols generated via transesterification reaction in the case of RDP. In contrast to PMP, RDP elongates the processing window but decreases the thermo–mechanical properties. Both additives increase the resistance in reactions against small flames with solely a phosphorous loading of 0.3 wt%, resulting in a V‐0 rating and an improvement in the OI value by up to 2% for RDP and 4% for PMP. Both FRs reduce the heat release rate but increase the smoke production and the smoke toxicity in the case of RDP.
Databáze: Directory of Open Access Journals
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje