Bio‐based Mg(OH)₂@M‐Phyt: improving the flame‐retardant and mechanical properties of flexible poly(vinyl chloride)

Abstract

Two novelty bio‐based multifunctional metallic phytate coated (M‐Phyt, M ≡ Cu, Zn) Mg(OH)2 (MH@M‐Phyt) were designed and incorporated into flexible poly(vinyl chloride) (PVC). MH@M‐Phyt was incorporated into PVC materials in a powder form. The morphology of the interface between MH and M‐Phyt and their binding states were characterized by TEM and X‐ray photoelectron spectroscopy (XPS), respectively. The TEM images of MH@M‐Phyt indicated that M‐Phyt was successfully coated on the MH surface. Additionally, from the XPS spectra M‐Phyt and MH were connected by Mg–O–P bonds. The flame retardancy and mechanical properties of the PVC composites were investigated through the limiting oxygen index, cone calorimetry and mechanical tests. The char residues were analyzed by SEM. The results revealed that the MH@M‐Phyt powder functioned well in PVC, with a flame retardancy, smoke density, tensile strength and elongation at break better than those of PVC/MH. With 10 phr loading, the peak heat release rate of PVC/MH@Zn‐Phyt and PVC/MH@Cu‐Phyt decreased by 33.5% and 24.6%, respectively, benefitting from the formation of firmer and denser char layers on the char residues. © 2019 Society of Chemical Industry

Organometallic Magnesium Complex with Aggregation Induced Emission Properties: Synthesis, Characterization, and Fluorescent Fibers Applications

“…[34,35] The spectra of O 1s in Figure 1e was consisted of two peaks which assigned to a C=O bond (530.56 eV) and Mg-OÀ C bond (528.89 eV), respectively. [36] Therefore, it proved that the C=O of DBM was coordinated with Mg. The results of XPS were consisted with NMR structure.…”

Reutilization of melamine‐formaldehyde foam wastes: Removing Sn2+ in simulated tin‐containing wastewater to transform a fire hazard suppressant of flexible poly(vinyl chloride)

“…Some important thermal degradation parameters including T 5% , T max1 (the temperature at the maximum mass loss rate at the first stage), T max2 (the temperature at the maximum mass loss rate at the second stage), V max1 (the maximum rate of weight loss at the first stage) are shown in Table 2. Figure 4a presented that a noticeable mass loss of all samples occurred before 350°C, which was mainly the removal of hydrogen chloride gas and degradation of plasticizer DOP, while the further weight loss (above 350°C) could be attributed to the pyrolysis of the conjugated polyene structure 23–25 . In the presence of CMF, the T 5% and T max1 of PVC/CMF‐2.5 were a little higher than the neat PVC, mainly due to the high initial thermal decomposition temperature of the CMF itself, but its char residue was slightly lower than that of the neat PVC.…”

Composites of Poly(vinyl chloride) with Residual Hops after Supercritical Extraction in CO2

“…However, the addition of modifiers, including plasticizers, to PVC results in a reduction in the chlorine content of the mass, leading to a significant deterioration in flame resistance, especially of flexible PVC [ 23 ]. Therefore, the current reports in the literature on bio-based FRs focus on the flame retardancy of flexible PVC by using nitrogen- or phosphorous-containing bio-plasticizer [ 24 , 25 , 26 ], phytic acid salts [ 27 , 28 , 29 ], lignins [ 30 ] and chitosan [ 31 , 32 , 33 ]. In the case of composites with a matrix of flammable polymers, also the addition of natural fillers such as kenaf [ 34 ], flax [ 35 ], bamboo [ 36 ], agave waste [ 37 ] and abaca [ 38 ] results in increased flame resistance.…”