Poly(vinylphosphonate)s as Macromolecular Flame Retardants for Polycarbonate

Abstract

A series of poly(dialkyl vinylphosphonate)s (PDAVPs) have recently been reported to be available via rare earth metal-mediated group transfer polymerization (REM-GTP). We extend the existing portfolio of polyvinylphosphonates (PVPs) by presenting poly(ditolyl vinylphosphonate) (PDTVP) as the first example of a poly(diaryl vinylphosphonate) (PDArVP). Thermogravimetric analyses revealed that, for PDTVP, in contrast to the selected PDAVPs, side group cleavage does not occur. Instead, thermal decomposition takes place in a one-step mechanism at high temperatures above 350 °C. A series of PDAVPs and PDTVP were tested for their performance as flame-retardant additives (FRA) as well as flame-retardant coatings (FRC) for polycarbonate (PC). We thereby found that PDTVP is a promising FRA, because of its high thermal stability and its compatibility with polycarbonate. Poly(diisopropyl vinylphosphonate) (PDIVP) shows excellent performance as an FRC, because it forms a stable, blistered crust of poly(vinylphosphonic acid) (PVPA) upon flame treatment.

Multicomponent-Reaction-Ready Biomass-Sourced Organic Hybrids Fabricated via the Surface Immobilization of Polymers with Lignin-Based Compounds

“…Since PE fabrics featuring polymeric α-amino phosphonate esters were expected to show unique thermal properties due to heteroatom integrations, the TG/DTA properties of PE-PAP were analyzed (Figure ) and are summarized in Table . As expected from previous investigations on PMV thermal properties, the residual amount of PE-PAPs at 800 °C (Wt 800 °C ) was higher than that of the starting PE-PMV, whereas all PE-PAPs showed fairly low decomposition initiation temperatures likely due to the P–O bonding cleavage . This increase in Wt 800 °C shows that the phosphorus and nitrogen atoms enhanced the thermal resistant abilities of the PE-PAPs.…”

Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

“…[14][15][16][17] Undoubtedly, intermingling with additive-type ame retardants is the most convenient and workable strategy to improve the ame retardancy of PC materials. 18,19 Based on this cognition, massive effective ame retardants have been developed and applied in ame retarding PC materials, including halogencontaining, 20 sulphonate-containing, 21,22 organosilicon-containing, 23 phosphorus-containing compounds, 24 inorganic additives, 25 and nanomaterials. 26,27 Recently, as a promising intermediate in developing novel halogen-free ame retardants, 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) have been frequently used to synthesize effective and efficient phosphaphenanthrene-containing ame retardant additives for various polymer materials.…”

Surface Engineering of Fluoropolymer Films via the Attachment of Crown Ether Derivatives Based on the Combination of Radiation-Induced Graft Polymerization and the Kabachnik–Fields Reaction

“…The thermogravimetry-differential thermal analysis (TG-DTA) profiles of the original ETFE film, ETFE- g -PSt-CHO, and the obtained films, further support the successful attachment of the α-amino phosphonate ester moieties, as depicted in Figure 5. As previously reported [14,32], polymeric α-amino phosphonate esters exhibit a specific initial decomposition behavior at approximately 200 °C, probably owing to the cleavage of phosphonate ester units [34]. As depicted in Figure 5, the obtained crown ether-tethered film showed the above-mentioned initial decomposition behavior at approximately 200 °C, and increased the remaining weight at 550 °C, as compared to the corresponding original ETFE and ETFE- g -PSt-CHO films.…”