Synthesis and Characterization of Caged Phosphate Microparticles Coated with Melamine Resin Based on Composite Properties of Materials

2012 ◽  
Vol 583 ◽  
pp. 236-239
Author(s):  
Xiao Min Fang ◽  
Yuan Qing Xu ◽  
Tao Ding
Keyword(s):  
Flame Retardants ◽  
In Situ Polymerization ◽  
Core Material ◽  
Gravimetric Analysis ◽  
Melamine Resin ◽  
Flame Retarded ◽  
Properties Of Materials ◽  
Loading Amount

In order to develop efficient “three in one” intumesent flame retardants, a novel caged bicyclic phosphate, tris(1-oxo-2,6,7-trioxa-1-phosphorbicyclo[2.2.2]octane methylene-4)phosphate (trimer) as the core material was encapsulated by melamine resin and etherified melamine resin as nitrogen resource respectively via in situ polymerization. The two microencapsulations were characterized by SEM, XPS and thermal gravimetric analysis. When they were used as intumesent flame retardant in epoxy they all exhibit good properties. With 20wt% loading amount the flame-retarded epoxy all can pass UL94 V-0 rating.

Preparation and Characterization of a Novel Flame Retarded MCA-PA6 Resin by In Situ Polymerization

2011 ◽  
Vol 399-401 ◽  
pp. 444-448 ◽  
Author(s):  
Jun Qian Mu ◽  
Yi Yang ◽  
Zhi Han Peng
Keyword(s):  
Loss Rate ◽  
In Situ Polymerization ◽  
Mass Loss Rate ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Good Thermal Stability ◽  
Flame Retarded ◽  
Maximum Mass Loss

In this paper, a novel flame retarded MCA-PA6 (PA6 incorporated with melamine cyanurate) resin was synthesized by in-situ polymerization. The synthetic product was characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), Fourier transform infrared spectroscope (FTIR), thermogravimetry analysis (TG), differential scanning calorimetry (DSC) and elemental analysis. The result showed that good dispersability were obtained in MCA-based PA6 prepared successfully. Meanwhile, the maximum mass loss rate appeared at about 450 °C and the residual char increased from 1.2 wt% to 3.2 wt% at 500 °C due to the existence of MCA.This research revealed MCA-PA6 owned a good thermal stability, hence there was potential flame retardance.

Preparation and Characterization of Conductive Polyaniline/Zirconia Nanoparticles Composites

2011 ◽  
Vol 221 ◽  
pp. 302-307 ◽  
Author(s):  
Hui Huang ◽  
Zhong Cheng Guo ◽  
Wei Zhu ◽  
Fa Chuang Li
Keyword(s):  
In Situ Polymerization ◽  
Thermo Gravimetric Analysis ◽  
Zro2 Nanoparticles ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Thermo Gravimetric ◽  
Maximum Conductivity ◽  
Conductive Polyaniline

Conductive polyaniline/zirconia (PANI/ZrO2) composites have been synthesized by in-situ polymerization of aniline in the presence of ZrO2 nanoparticles. The structure and morph- ology of composites were characterized by Fourier-transform infrared spectra (FTIR), thermo- gravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscope (SEM). The conductivity was also investigated. The results showed that PANI and ZrO2 nanoparticles were not simply blended, and a strong interaction existed at the interface of ZrO2 and PANI. It was probably a composite at molecular level. The composites were more thermal stability than that of the pure PANI. XRD analyses confirmed PANI deposited on the surface of ZrO2 nanoparticles had no effect on crystallization performance of ZrO2 nanoparticles. Electrical conductivity measurements indicated that the conductivity of PANI/ZrO2 composites was much higher than that of PANI and the maximum conductivity obtained was 11.27S/cm at 15 wt% of ZrO2 nanoparticles.

Synthesis and Characterization of the PANI/ITO Conducting Nanocomposites

2010 ◽  
Vol 663-665 ◽  
pp. 542-545 ◽  
Author(s):  
Bing Jie Zhu ◽  
Xin Wei Wang ◽  
Mei Fang Zhu ◽  
Qing Hong Zhang ◽  
Yao Gang Li ◽  
...  
Keyword(s):  
Doping Concentration ◽  
In Situ Polymerization ◽  
Synthesis And Characterization ◽  
Conductivity Measurements ◽  
X Ray Diffraction ◽  
X Ray ◽  
Maximum Conductivity ◽  
Scanning Electron

The PANI/ITO conducting nanocomposites have been synthesized by in-situ polymerization. The obtained nanocomposites were characterized by X-ray diffraction pattern, scanning electron microscopy and Fourier transform infrared. Electrical conductivity measurements on the samples pressed into pellets showed that the maximum conductivity attained 2.0 ± 0.05 S/cm for PANI/ITO nanocomposites, at ITO doping concentration of 10 wt%. The results of the present work may provide a simple, rapid and efficient approach for preparing PANI/ITO nanocomposites.

An Innovative Use of TDR Probes: First Numerical Validations with a Coaxial Cable

2018 ◽  
Vol 23 (4) ◽  
pp. 437-442
Author(s):  
Raffaele Persico ◽  
Iman Farhat ◽  
Lourdes Farrugia ◽  
Sebastiano D'Amico ◽  
Charles Sammut
Keyword(s):  
Magnetic Properties ◽  
Transmission Line ◽  
Time Domain ◽  
Numerical Data ◽  
Time Domain Reflectometry ◽  
Coaxial Cable ◽  
Transmission Line Model ◽  
Properties Of Materials

In this paper we propose a study regarding some possibilities that can be offered by a time domain reflectometry (TDR) probe in retrieving both dielectric and magnetic properties of materials. This technique can be of interest for several applications, among which the characterization of soil in some situations. In particular, here we propose an extension of the paper “Retrieving electric and magnetic propetries of the soil in situ: New possibilities”, presented at the IWAGPR, held in Edinburgh in 2017, and as a new contribution we will validate a transmission line model with numerical data simulated by the CST code.

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