Synergistic effect of green phosphorus-containing bio-based material and two-dimensional layered material composite on flame retardant of polyvinyl alcohol

Flame-retardant polyvinyl alcohol (PVA) membranes with high transparency and flexibility were prepared by mixing an aqueous solution of a phosphorus-containing acrylic acid (AOPA) with PVA. The reaction between AOPA and PVA, the transparency, the crystallinity and the flexibility of the membrane were investigated with Fourier transform infrared spectrometry (FTIR), UV–vis light transmittance, X-ray diffraction and tensile tests, respectively. The limited oxygen index (LOI) and vertical flame (UL 94 VTM), microscale combustion calorimetry, thermogravimetric analysis (TGA) and TGA-FTIR were employed to evaluate the flame retardancy as well as to reveal the corresponding mechanisms. Results showed that PVA containing 30 wt% of AOPA can reach the UL 94 VTM V0 rating with an LOI of 27.3% and retain 95% of the original transparency of pure PVA. Adding AOPA reduces crystallinity of PVA, while the flexibility is increased. AOPA depresses the thermal degradation of PVA and promotes char formation during combustion. The proposed decomposition mechanism indicates that AOPA acts mainly in the condensed phase.

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The Preparation, Thermal Properties, and Fire Property of a Phosphorus-Containing Flame-Retardant Styrene Copolymer

Materials ◽

10.3390/ma13010127 ◽

2019 ◽

Vol 13 (1) ◽

pp. 127 ◽

Cited By ~ 2

Author(s):

Yu Sun ◽

Yazhen Wang ◽

Li Liu ◽

Tianyuan Xiao

Keyword(s):

Thermal Properties ◽

Thermogravimetric Analysis ◽

Flame Retardant ◽

Oxygen Index ◽

Limiting Oxygen Index ◽

Chemical Structures ◽

1H Nuclear Magnetic Resonance ◽

Phosphorus Containing ◽

Ft Ir ◽

Ft Ir Spectroscopy

A 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) acrylate, (6-oxidodibenzo [c,e][1,2] oxaphosphinin-6-yl) methyl acrylate (DOPOAA), has been prepared. Copolymers of styrene (St) and DOPOAA were prepared by emulsion polymerization. The chemical structures of copolymers containing levels of DOPOAA were verified using Fourier transform infrared (FT-IR) spectroscopy and 1H nuclear magnetic resonance (1H-NMR) spectroscopy. The thermal properties and flame-retardant behaviors of DOPO-containing monomers and copolymers were observed using thermogravimetric analysis and micro calorimetry tests. From thermogravimetric analysis (TGA), it was found out that the T5% for decomposition of the copolymer was lower than that of polystyrene (PS), but the residue at 700 °C was higher than that of PS. The results from micro calorimetry (MCC) tests indicated that the rate for the heat release of the copolymer combustion was lower than that for PS. The limiting oxygen index (LOI) for combustion of the copolymer rose with increasing levels of DOPOAA. These data indicate that copolymerization of the phosphorus-containing flame-retardant monomer, DOPOAA, into a PS segment can effectively improve the thermal stability and flame retardancy of the copolymer.

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Synergistic Effect and Flame-retardant Properties of Small Molecular Organic Amines and Phosphates

Fibers and Polymers ◽

10.1007/s12221-021-9789-3 ◽

2021 ◽

Author(s):

Xin Chen ◽

Junkang Guo ◽

Limei Ren ◽

Shenyong Ren ◽

Baojian Shen ◽

...

Keyword(s):

Synergistic Effect ◽

Flame Retardant ◽

Flame Retardant Properties ◽

Organic Amines

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Solvothermal Preparation of Spherical Bi2O3 Nanoparticles Uniformly Distributed on Ti3C2Tx for Enhanced Capacitive Performance

Nanoscale Advances ◽

10.1039/d1na00443c ◽

2021 ◽

Author(s):

Tao Li ◽

Xuefeng Chang ◽

Lifang Mei ◽

Xiayun Shu ◽

Jidong Ma ◽

...

Keyword(s):

Electrical Conductivity ◽

Chemical Stability ◽

Layered Structure ◽

Layered Material ◽

Two Dimensional ◽

Capacitive Performance ◽

Solvothermal Preparation

Ti3C2Tx is a promising new two-dimensional layered material for supercapacitors with good electrical conductivity and chemical stability. However, Ti3C2Tx has problems such as collapse of the layered structure and low...

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