In-situ synthesis of a novel CaO·4B2O3 · 2H2O–SiO2 nanocomposite and its influence on mechanical property and flame retardancy of polypropylene

2020 ◽  
Vol 10 (2) ◽  
pp. 225-230
Author(s):  
Ping Li ◽  
Hong-Hong Yan ◽  
Zhi-Hong Liu
Keyword(s):  
Mechanical Property ◽  
Thermal Stability ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
In Situ Synthesis ◽  
Physical Mixture ◽  
Fire Performance ◽  
Good Thermal Stability ◽  
Ft Ir

A novel CaO·4B2O3·2H2O–SiO2 nanocomposite with good thermal stability has been in situ synthesized, in which the SiO2 nanospheres are supported on the CaO·4B2O3·2H2O nanosheets. As a comparison, single CaO·4B2O3 ·2H2O nanosheet with the thickness of 100 nm, single SiO2 nanosphere with the diameter of about 100 nm, and their physical mixture were also prepared, respectively. On the basis of characterizations of XRD, FT-IR, TGA, SEM and TEM, the fire performance of CaO·4B2O3 ·2H2O–SiO2 nanocomposite to polypropylene was studied. It is demonstrated that the flame retardancy of prepared sample was prominently stronger than those of single CaO·4B2O3 ·2H2O nanosheet and their physical mixture. Furthermore, the mechanical property of polypropylene/CaO·4B2O3·2H2O–SiO2 composite was also assessed. The possible formation mechanism of the nanocomposite and its flame-retardant mechanism were put forward. It has prospect as possible flame retardant to polypropylene and other polymers.

scholarly journals In situ synthesis of MWCNT-graft-polyimides: thermal stability, mechanical property and thermal conductivity

RSC Advances ◽  
2020 ◽  
Vol 10 (23) ◽  
pp. 13517-13524
Author(s):  
Chunbo Wang ◽  
Bing Cong ◽  
Junyu Zhao ◽  
Xiaogang Zhao ◽  
Daming Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Mechanical Property ◽  
Thermal Stability ◽  
In Situ Synthesis ◽  
Enhanced Thermal Conductivity

In situ synthesis of MWCNT-graft-polyimides enhanced thermal conductivity at a relatively low loading.

One-step in situ synthesis of a novel α-zirconium phosphate/graphene oxide hybrid and its application in phenolic foam with enhanced mechanical strength, flame retardancy and thermal stability

RSC Advances ◽  
2016 ◽  
Vol 6 (78) ◽  
pp. 74903-74912 ◽  
Author(s):  
Xiaoyan Li ◽  
Zhengzhou Wang ◽  
Lixin Wu ◽  
Tsungyen Tsai
Keyword(s):  
Thermal Stability ◽  
Graphene Oxide ◽  
Mechanical Strength ◽  
Flame Retardancy ◽  
Zirconium Phosphate ◽  
In Situ Synthesis ◽  
Phenolic Foam ◽  
One Step ◽  
Mechanical Strengths

A novel α-zirconium phosphate/graphene oxide hybrid was synthesized, and its incorporation into phenolic foam can greatly improve mechanical strengths, thermal stability and flame retardancy of the foam.

The Synergistic Effect of Poly(Bisphenol phenyl dichlovophosphate) and Ammonium Polyphosphate in Flame Retardant ABS

2012 ◽  
Vol 602-604 ◽  
pp. 762-767
Author(s):  
Chong Peng ◽  
Yan Zhang ◽  
Hao Ran Wang
Keyword(s):  
Thermal Stability ◽  
Synergistic Effect ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Ammonium Polyphosphate ◽  
Index Test ◽  
Good Thermal Stability ◽  
Abs Resin ◽  
Stable Flame ◽  
Higher Temperature

The flame retardancy of a thermally stable flame retardant, poly(bisphenol phenyl dichlovophosphate) (PBCL) and its synergistic effect with ammonium polyphosphate were studied in ABS. TG result indicated the good thermal stability and char-forming ability of PBCL. Thermal stability and flammability properties of ABS/APP/PBCL composites were investigated by thermogravimetric analysis (TGA), oxygen index test (LOI) and micro calorimeter calculate test (MCC). The results showed that the synergistic effect of APP and PBCL improved the thermal stability and flame retardancy of ABS, which was favorable to yield more stable layer at higher temperature and enhanced the char residue of ABS resin.

IN SITU SYNTHESIS OF CORAL-LIKE MELAMINE FORMALDEHYDE RESINS/CARBON NANOTUBES MICROPARTICLES

2017 ◽  
Vol 24 (Supp02) ◽  
pp. 1850021
Author(s):  
SHAOYAN MOU ◽  
YONG JIANG
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Stability ◽  
Growth Process ◽  
In Situ Polymerization ◽  
In Situ Synthesis ◽  
Composite Particles ◽  
The Novel ◽  
Melamine Formaldehyde ◽  
Good Thermal Stability

A kind of coral-like melamine formaldehyde resins/carbon nanotubes (MF/CNTs) composite particles were prepared via in situ polymerization, which showed good thermal stability under 450[Formula: see text]C. To illustrate the mechanism of the polymer growth process, silica/CNTs were also prepared via the same method to achieve a contrast. Generally, two models were used to illustrate silica growth mechanism, the monomer addition one and the controlled aggregation one. We preferred that the monomer addition model could explain the growth of the novel coral-like MF/CNTs particles.

Preparing and Applying of Flame Retardant Microcapsules Containing Magnesium Hydroxide

2013 ◽  
Vol 734-737 ◽  
pp. 2191-2194
Author(s):  
Li Li Wu ◽  
Yuan Lian ◽  
Dan Liu ◽  
Hua Zheng ◽  
Dian Wu Huang
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Magnesium Hydroxide ◽  
Low Density Polyethylene ◽  
Core Shell ◽  
Low Density ◽  
Melamine Resin ◽  
Shell Material ◽  
Elongation At Break ◽  
Good Thermal Stability

In this study, flame retardant microcapsules were synthesized using magnesium hydroxide as core materials, melamine resin as the shell material. The structure, diameters and thermal properties of prepared microcapsules were investigated by using FTIR, ELS, DSC and TGA. The effects of core/shell ratio on the properties of microcapsules were studied.Flame retardant materials of low-density polyethylene/magnesium hydroxide microcapsules were prepared.The tensile strength and elongation at break tests were performed to determine its mechanical property.Inflammability of the materials was also studied.The results showed the prepared magnesium hydroxide microcapsule shows good thermal stability and it has free compatibility with the polymer.The composites of HDPE/MH microcapsules have good performance．

Preparation, characterization and testing of flame retardant cotton cellulose material: flame retardancy, thermal stability and flame-retardant mechanism

Cellulose ◽  
2021 ◽  
Vol 28 (6) ◽  
pp. 3789-3805
Author(s):  
Ling Sun ◽  
Huixin Wang ◽  
Wennan Li ◽  
Jiaojiao Zhang ◽  
Zheng Zhang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Cotton Cellulose ◽  
Cellulose Material

In Situ Synthesis of SiO2 Nanoparticles by Sol-Gel Method on Cotton Fabrics and Investigation of their Physical and Chemical Properties

2021 ◽  
Vol 891 ◽  
pp. 37-42
Author(s):  
Sheila Shahidi ◽  
Hakimeh Mohammadbagherloo ◽  
Seyedmohammad Elahi ◽  
Sanaz Dalalsharifi ◽  
Rattanaphol Mongkholrattanasit
Keyword(s):  
Flame Retardant ◽  
Water Drop ◽  
Sol Gel ◽  
Cotton Fabrics ◽  
In Situ Synthesis ◽  
Order Structure ◽  
Gel Method ◽  
Sol Gel Method ◽  
Flame Retardant Properties

In this paper, the sol-gel method was used for in-situ synthesis of SiO2 nanoparticles (NPs) on cotton fabrics with tetraethyl orthosilicate (TEOS) in the presence of acid and alkaline indicators. The samples were characterized using by (X-ray diffraction) XRD, (scanning electron Microscopy) SEM, (Inductively coupled plasma) ICP, water drop test and also the flame retardant properties were studied by char yield. The SEM images showed that the nanoparticles are spherical in shape and the acidity or alkalinity of the medium has an effect on the formation of particles. The XRD patterns showed the typical diffraction of amorphous SiO2 (Si-O short-order structure), also ICP analysis showed that by washing the fabrics, the nanoparticles are still present on the fabric, and this indicated the stability of the washing of the fabrics impregnated with the nanoparticles. By in-situ synthesis of SiO2 nanoparticles, the flame retardant properties have been improved significantly and the amount of residual char was increased and samples were observed to be hydrophilic.

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