The effect of 3D structure design on fire behavior of polyethylene terephthalate glycol containing aluminum hypophosphite and melamine cyanurate

2020 ◽  
Vol 138 (12) ◽  
pp. 50072
Author(s):  
Lucie Zárybnická ◽  
Petra Mácová ◽  
Dita Machová ◽  
Jozef Rychlý ◽  
Alberto Viani
Keyword(s):  
Polyethylene Terephthalate ◽  
3D Structure ◽  
Fire Behavior ◽  
Structure Design ◽  
Melamine Cyanurate ◽  
Aluminum Hypophosphite

SEBS-based thermoplastic elastomers containing aluminum hypophosphite and melamine cyanurate: Thermal degradation, flame retardancy, and mechanical properties

2019 ◽  
Vol 37 (2) ◽  
pp. 137-154 ◽  
Author(s):  
Xi Cheng ◽  
Jianming Wu ◽  
Yulin Li ◽  
Chenguang Yao ◽  
Guisheng Yang
Keyword(s):  
Flame Retardant ◽  
Thermoplastic Elastomers ◽  
Char Residue ◽  
Melamine Cyanurate ◽  
Char Layer ◽  
Phenylene Oxide ◽  
Peak Heat Release Rate ◽  
Ul 94 ◽  
Flame Retardant Properties ◽  
Aluminum Hypophosphite

Aluminum hypophosphite combined with melamine cyanurate and poly(phenylene oxide) was applied to flame-retard TPE-S system (blends of SEBS and polyolefin). The flame-retardant properties of the TPE-S/AHP/MCA/PPO were investigated by LOI and vertical burning test (UL-94). The results indicated that TPE-S containing 16 wt% AHP, 20 wt% MCA, and 10 wt% PPO reached a V-0 rating in the UL-94 test, and its LOI value was 28.2%. It performed well in the cone calorimeter (reduction in peak heat release rate from 2001 to 494 kW m−2). Thermogravimetric-Fourier transform infrared spectroscopy tests showed that AHP and MCA acted in gaseous phase, while AHP and PPO helped to form char residue. The SEM graphs demonstrated that continuous and compact films cover bubbles of the char layer in TPE-S/AHP/MCA/PPO. The proposed flame-retardant mechanisms of such systems were summarized.

Aluminum hypophosphite and aluminum phenylphosphinate: A comprehensive comparison of chemical interaction during pyrolysis in flame-retarded glass-fiber-reinforced polyamide 6

2019 ◽  
Vol 37 (3) ◽  
pp. 193-212
Author(s):  
Xi Cheng ◽  
Jianming Wu ◽  
Chenguang Yao ◽  
Guisheng Yang
Keyword(s):  
Heat Release ◽  
Glass Fiber ◽  
Chemical Interaction ◽  
Fire Behavior ◽  
Polyamide 6 ◽  
Fiber Reinforced ◽  
Limiting Oxygen Index ◽  
Glass Fiber Reinforced ◽  
Flame Retarded ◽  
Aluminum Hypophosphite

This study compared thermal degradation, pyrolysis behavior, and the fire behavior of flame-retarded glass-fiber-reinforced polyamide 6 with aluminum hypophosphite and aluminum phenylphosphinate (BPA-Al), respectively. We sythesize aluminum phenylphosphinate by benzenephosphinic acid (BPA) and AlCl3.6H2O in water. so we call aluminum phenylphosphinate BPA-Al for short. The dependence of limiting oxygen index on phosphorus content was linear for aluminum hypophosphite and BPA-Al. Thermogravimetric analysis proved aluminum hypophosphite was less stable than BPA-Al. Thermogravimetric-Fourier transform infrared tests showed that aluminum hypophosphite system balanced the charring process and the gas releasing well, and that BPA-Al system enhanced the charring process and decreased the gas releasing. Peak heat release rate and total heat release data proved that aluminum hypophosphite system was superior to BPA-Al system in lowering the heat release. Their differences were caused by different P-H (aluminum hypophosphite) and P-phenyl (BPA-Al) structures. P-H structure did better than P-phenyl structure in balancing the condensed phase effect and the gaseous phase action. So P-H structure (aluminum hypophosphite) was more suitable than P-phenyl structure (BPA-Al) in the flame retardancy of glass-fiber-reinforced polyamide 6.

scholarly journals 3D structure design of magnetic ferrite cores using gelcasting and pressure-less sintering process

AIP Advances ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 035006 ◽  
Author(s):  
A. Stratta ◽  
B. Ahmadi ◽  
B. Mouawad ◽  
S. Robertson ◽  
L. De Lillo ◽  
...  
Keyword(s):  
3D Structure ◽  
Structure Design ◽  
Sintering Process

Combination effect of MoS2 with aluminum hypophosphite in flame retardant ethylene-vinyl acetate composites

RSC Advances ◽  
2016 ◽  
Vol 6 (44) ◽  
pp. 37672-37680 ◽  
Author(s):  
Keqing Zhou ◽  
Gang Tang ◽  
Saihua Jiang ◽  
Zhou Gui ◽  
Yuan Hu
Keyword(s):  
Flame Retardant ◽  
Vinyl Acetate ◽  
Ethylene Vinyl Acetate ◽  
Combination Effect ◽  
Melamine Cyanurate ◽  
Aluminum Hypophosphite

A series of flame retardant ethylene-vinyl acetate (EVA) composites, with different aluminum hypophosphite (AHP), melamine cyanurate (MCA) and MoS2 content, has been prepared.

3D Printing of Biosamples: A Concise Review

2017 ◽  
Vol 05 (02) ◽  
pp. 1740002
Author(s):  
Victoria Xin Ting Zhao ◽  
Ten It Wong ◽  
Xiaodong Zhou
Keyword(s):  
3D Printing ◽  
Self Assembly ◽  
3D Structure ◽  
Structure Design ◽  
Advantages And Disadvantages ◽  
Concise Review ◽  
Recent Developments ◽  
Good Biocompatibility ◽  
Extrusion Printing ◽  
3D Applications

This paper reviews the recent development of 3D printing of biosamples, in terms of the 3D structure design, suitable printing technology, and available materials. Successfully printed 3D biosamples should possess the properties of high cell viability, vascularization and good biocompatibility. These goals are attained by printing the materials of hydrogels, polymers and cells, with a carefully selected 3D printer from the categories of inkjet printing, extrusion printing and laser printing, based on the uniqueness, advantages and disadvantages of these technologies. For recent developments, we introduce the 3D applications of creating scaffolds, printing cells for self-assembly and testing platforms. We foresee more bio-applications of 3D printing will be developed, with the advancements on materials and 3D printing machines.

Dynamic Simulation Analysis on Flexible Assembling Fixture for Aircraft Panel Component

2010 ◽  
Vol 37-38 ◽  
pp. 382-385
Author(s):  
Li Gang Qu ◽  
Ke Qiang Pan ◽  
Xin Chen
Keyword(s):  
Dynamic Simulation ◽  
Simulation Analysis ◽  
Dynamic Theory ◽  
3D Structure ◽  
Structure Design ◽  
Assembly Process ◽  
Effective Solution ◽  
Technical Approach ◽  
Engineering Significance ◽  
Equipment Performance

Flexible assembling fixture (FAF) is a new-style assembling equipment in assembly process of aircraft panel components, which is developed based on combination of digitization of assembling and automated modular fixture. The multi-actuator is designed to positioning and clamping the panel component. The dynamic behavior of the FAF is analyzed in process of 3D structure design. The motion and displacement of every actuator are analyzed based on kinematic and dynamic theory, by means of building the Knopoff model taking friction between the vice sport into account. ADAMS is employed to carry out the dynamic simulation. This technical approach is the effective solution for developing the new equipment; moreover, its result presents a great engineering significance in improving the equipment performance.

scholarly journals Design and Simulation of Capacitive MEMS Switch for Ka Band Application

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Vinay Bhatia ◽  
Sukhdeep Kaur ◽  
Kuldeep Sharma ◽  
Punam Rattan ◽  
Vishal Jagota ◽  
...  
Keyword(s):  
Frequency Band ◽  
Phase Shifter ◽  
Rf Mems ◽  
Dielectric Material ◽  
Actuation Voltage ◽  
3D Structure ◽  
Structure Design ◽  
High Resistivity ◽  
Ka Band ◽  
Mems Switch

In this paper, RF MEMS switch with capacitive contact is designed and analyzed for Ka band application. A fixed-fixed beam/meander configuration has been used to design the switch for frequency band 10 GHz to 40 GHz. Electromagnetic and electromechanical analysis of three-dimensional (3D) structure/design has been analyzed in multiple finite element method (FEM) based full-wave simulator (Coventorware and high-frequency structure simulator). A comparative study has also been carried out in this work. The high resistivity silicon substrate ( tan δ = 0.010 , ρ > 8   k Ω − cm , ε r = 11.8 ) with a thickness of 675 ± 25   μ m has been taken for switch realization. The designed structure shows an actuation voltage of around 9.2 V. Impedance matching for the switch structure is well below 20 dB, loss in upstate, i.e., insertion loss >0.5 dB, and isolation of >25 dB throughout the frequency band is observed for the aforesaid structure. Furthermore, to increase the RF parameters, AIN dielectric material has been used instead of SiO2 resulting in capacitance in downstate that increases hence improved the isolation. The proposed switch can be utilized in various potential applications such as any switching/tunable networks phased-array radar, reconfigurable antenna, RF phase shifter, mixer, biomedical, filter, and any transmitter/receiver (T/R) modules.

Sign in / Sign up

Export Citation Format

Share Document