Injection molding of transparent polymeric materials with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide for enhanced fire retardancy

Ubowska, Agnieszka; Kowalczyk, Krzysztof; Krala, G.

doi:10.14314/polimery.2018.7.8

Cited by 2 publications

(4 citation statements)

References 2 publications

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“…The two characteristic bands of the coke are around 1600 cm À1 (G band, reacting to the content of graphitized carbon) and 1350 cm À1 (D band, reacting to the content of defective carbon). 13,40 It is known that ID/IG (the ratio of the peak areas of the D and G bands) reflects the degree of graphitization of carbon. 41 The ID/IG values were obtained by fitting the curves with Origin software, as shown in Figure 11.…”

Section: Vertical Combustion Testmentioning

confidence: 99%

“…The main studies to improve the diffusivity of DOPO are currently focused on: structural modification or nanosizing of DOPO. [11][12][13][14] The incorporation of RPUF in the form of microcapsules has not been extensively studied. 15 Based on this convenient improvement idea, in this study, a core-shell flame retardant PMDOPO was successfully synthesized with PMMA as the shell and DOPO as the core, and RPUF/PMDOPO composite foam material was obtained by incorporating it into RPUF.…”

Section: Introductionmentioning

confidence: 99%

“…The uneven diffusion in RPUF leads to a decrease in mechanical properties. The main studies to improve the diffusivity of DOPO are currently focused on: structural modification or nanosizing of DOPO 11–14 . The incorporation of RPUF in the form of microcapsules has not been extensively studied 15 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of microencapsulation flame retardant on flame retardancy and mechanical properties of rigid polyurethane foams

Peng,

Li,

et al. 2023

J of Applied Polymer Sci

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A microencapsulated flame retardant PMDOPO was synthesized by solution blending method using EGDMA as initiator and AIBN as cross‐linking agent. Rigid polyurethane foams were prepared in a one‐step process. PMDOPO was incorporated into the foams by blending with polycarbonate diols (PCDL) and foaming additives. The results of Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) showed that PMDOPO was well formed and uniformly dispersed in the foam. The pore size and density of the foams first increased and then decreased with the addition of PMDOPO. X‐ray photoelectron spectroscopy (XPS), vertical combustion test, and thermogravimetric analysis (TGA) showed that the PMDOPO content was directly proportional to the flame retardancy and the thermal stability. The major weight loss shifted to higher temperature intervals. The amount of residual char of RPUF/PMDOPO‐25 was enhanced 50 times to 10.63% compared to pure RPUF. In addition, SEM and Raman analyses of the combustion residual char revealed that a phosphorus‐containing char layer was formed during thermal degradation. The dense charcoal layer helps to insulate heat and suppress combustion. The universal testing machine showed that RPUF with 15 wt% content had the best compression resistance, with an enhancement of 1.8 MPa over pure RPUF.

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Section: Vertical Combustion Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of microencapsulation flame retardant on flame retardancy and mechanical properties of rigid polyurethane foams

Peng,

Li,

et al. 2023

J of Applied Polymer Sci

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“…Modern polymeric materials for cable sheaths should exhibit low flammability and smoke production as well as no emission of toxic gases during their combustion [ 1 , 2 ]. Fire resistance of thermoplastics can be improved by incorporation of appropriate additives (e.g., P-based compounds [ 3 , 4 , 5 ]) and/or throughout chemical modification of a polymeric matrix [ 6 ]. One of the most commonly used thermoplastics in the cable industry is polyethylene (PE) due to its relatively high electrical resistivity, easy processing, and lack of halogen elements, however, it is a highly flammable material and must be flame retarded.…”

Section: Introductionmentioning

confidence: 99%

Green Highly Clay-Filled Polyethylene Composites as Coating Materials for Cable Industry—A New Application Route of Non-Organophilised Natural Montmorillonites in Polymeric Materials

et al. 2020

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In order to develop flame retardant and relatively green cable coating materials, polyethylene (PE) was melt blended with 5, 7.5, or 10 wt. % of a natural calcium montmorillonite (C–Ca) pre-dispersed in EBA (ethylene-butyl acrylate copolymer), EVA (ethylene-vinyl acetate copolymer), or mEVA (EVA modified with maleic anhydride). For comparison, an organophilised montmorillonite (CW9) was tested. The main study of composites containing EBA/C–Ca, EVA/C–Ca, and mEVA/CW9 pre-dispersions revealed that both clays were not fully exfoliated in the matrix, however, C–Ca (7.5 wt. %) markedly increased limited oxygen index (LOI) from 18% O2 (PE) up to 22.0% O2. An insignificantly higher LOI value (22.2% O2) was noted for a sample with 10 wt. % of CW9. The fillers did not affect hardness, but spectacularly increased Young’s modulus of the compression-moulded samples (tensile strength and elongation at break values were reduced). Thermal features of the matrix were not unpredictably changed by the clays. Generally, all the tests revealed that PE filled with the chemically untreated natural C–Ca reached similar or better mechanical and thermal features than materials containing the ammonium salt-modified montmorillonite.

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Injection molding of transparent polymeric materials with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide for enhanced fire retardancy

Cited by 2 publications

References 2 publications

Effect of microencapsulation flame retardant on flame retardancy and mechanical properties of rigid polyurethane foams

Effect of microencapsulation flame retardant on flame retardancy and mechanical properties of rigid polyurethane foams

Green Highly Clay-Filled Polyethylene Composites as Coating Materials for Cable Industry—A New Application Route of Non-Organophilised Natural Montmorillonites in Polymeric Materials

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