Flame retardant and mechanical properties of natural fibre–PP composites containing magnesium hydroxide

2004 ◽  
Vol 83 (2) ◽  
pp. 363-367 ◽  
Author(s):  
M Sain ◽  
S.H Park ◽  
F Suhara ◽  
S Law
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Magnesium Hydroxide ◽  
Natural Fibre ◽  
Pp Composites

scholarly journals Flame Retardant Polypropylene Composites with Low Densities

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 152 ◽  
Author(s):  
Nerea Pérez ◽  
Xiao-Lin Qi ◽  
Shibin Nie ◽  
Pablo Acuña ◽  
Ming-Jun Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Zirconium Phosphate ◽  
Synergetic Effect ◽  
Low Density ◽  
Material Density ◽  
Polypropylene Composites ◽  
Peak Heat Release Rate ◽  
Pp Composites

Polypropylene (PP) is currently widely used in areas requiring lightweight materials because of its low density. Due to the intrinsic flammability, the application of PP is restricted in many conditions. Aluminum trihydroxide (ATH) is reported as a practical flame retardant for PP, but the addition of ATH often diminishes the lightweight advantage of PP. Therefore, in this work, glass bubbles (GB) and octacedylamine-modified zirconium phosphate (mZrP) are introduced into the PP/ATH composite in order to lower the material density and simultaneously maintain/enhance the flame retardancy. A series of PP composites have been prepared to explore the formulation which can endow the composite with balanced flame retardancy, good mechanical properties, and low density. The morphology, thermal stability, flame retardancy, and mechanical properties of the composites were characterized. The results indicated the addition of GB could reduce the density, but decreased the flame retardancy of PP composites at the same time. To overcome this defect, ATH and mZrP with synergetic effect of flame retardancy were added into the composite. The dosage of each additive was optimized for achieving a balance of flame retardancy, good mechanical properties, and density. With 47 wt % ATH, 10 wt % GB, and 3 wt % mZrP, the peak heat release rate (pHRR) and total smoke production (TSP) of the composite PP-4 were reduced by 91% and 78%, respectively. At the same time, increased impact strength was achieved compared with neat PP and the composite with ATH only. Maintaining the flame retardancy and mechanical properties, the density of composite PP-4 (1.27 g·cm−3) is lower than that with ATH only (PP-1, 1.46 g·cm−3). Through this research, we hope to provide an efficient approach to designing flame retardant polypropylene (PP) composites with low density.

scholarly journals Basalt Fiber Modified Ethylene Vinyl Acetate/Magnesium Hydroxide Composites with Balanced Flame Retardancy and Improved Mechanical Properties

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2107
Author(s):  
Dongwei Yao ◽  
Guangzhong Yin ◽  
Qingqing Bi ◽  
Xu Yin ◽  
Na Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Vinyl Acetate ◽  
Magnesium Hydroxide ◽  
Performance Enhancement ◽  
Basalt Fiber ◽  
Ethylene Vinyl Acetate ◽  
Limiting Oxygen Index ◽  
Cone Calorimeter Test ◽  
Flame Retardant Properties

In this study, we selected basalt fiber (BF) as a functional filler to improve the mechanical properties of ethylene vinyl acetate (EVA)-based flame retardant materials. Firstly, BF was modified by grafting γ-aminopropyl triethoxysilane (KH550). Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscope (SEM), and energy dispersive X-ray spectroscopy (EDS) were used to comprehensively prove the successful modification of the BF surface. Subsequently, the modified BF was introduced into the EVA/magnesium hydroxide (MH) composites by melt blending. The limiting oxygen index (LOI), UL-94, cone calorimeter test, tensile test, and non-notched impact test were utilized to characterize both the flame retardant properties and mechanical properties of the EVA/MH composites. It was found that the mechanical properties were significantly enhanced without reducing the flame retardant properties of the EVA/MH composites. Notably, the surface treatment with silane is a simple and low-cost method for BF surface modification and the pathway designed in this study can be both practical and effective for polymer performance enhancement.

scholarly journals Comparative Analysis of Peat Fibre Properties and Peat Fibre-Based Knits Flammability

2019 ◽  
Vol 19 (2) ◽  
pp. 157-164 ◽  
Author(s):  
Daiva Mikucioniene ◽  
Lina Cepukone ◽  
Khalifah A. Salmeia ◽  
Sabyasachi Gaan
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Textile Industry ◽  
Average Diameter ◽  
Natural Fibre ◽  
Cotton Yarn ◽  
Knitted Fabrics ◽  
Time To Ignition ◽  
Knitted Structure

Abstract A very promising cellulose-based natural fibre that is suitable for use in the textile industry is peat fibre. This fibre is a by-product of peat excavation, purified by separating it from other components. In this study, the morphological, chemical and mechanical properties of peat fibres as well as flammability of peat-based knitted fabrics were analysed. The average diameter of the peat fibres is ~60 μm, but it varies in very wide ranges – 25–150 μm; however, the number of fibres with diameter more than 100 μm is very low. As the peat fibre contains a high amount of lignin, lignin amount in the mixed peat/cotton yarn is relatively high too. Lignin is responsible for enhanced flame retardancy; therefore, time to ignition of the peat knit is ~30% higher than that of the cotton knit. Consequently, peat fibre can be used in the knitted structure in order to significantly reduce its flammability. In order to increase the flame retardancy, the knits have been treated by flame retardant in various concentrations. It was found that around the burned hole on the peat knit, treated by very low concentration flame retardant, forms charred area and the knit stops to burn even if the flame source is not removed.

scholarly journals Fabrication and Study of Mechanical and Thermal Properties of Natural Fibre Composites Material Based on SCB and GNSP

2019 ◽  
pp. 51-56
Author(s):  
Himanshu Gupta ◽  
Kamal Kanaujiya ◽  
Syed Mazher Abbas Rizvi
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Polymer Matrix ◽  
Physical And Mechanical Properties ◽  
Natural Fibre ◽  
Environmental Benefits ◽  
Mechanical And Thermal Properties ◽  
Izod Impact Strength ◽  
Izod Impact ◽  
Pp Composites

To determine the possibility of using sugar- cane bagasse (SCB)and ground nut shell particulate(GNSP) waste as reinforcing ?ller in the thermo plastic polymer matrix, SCB&GNSP-reinforced polypropylene (PP) composites were prepared. The PP and SCB and GNSP composites were prepared by the extrusion of PP and GNSP with 5, 10, 15, and 20 wt % of SCB and GNSP with 3,6,9 and 12% filler in a co rotating twin screw extruder.. The extruded strands were cut into pellets and injection molded to make test specimens. These specimens were tested for physical and mechanical properties such as tensile, flexural, Izod impact strength shore D hardness and water absorption. It was found that the Tensile strength increased from 29.06 to 31.38 MPa, Flexural strength increased from 28.62 to 43.56 MPa, Izod impact strength decreased from 35.11 to 30.93 J/m, and Shore D Hardness increased from 64.88 to 77.89, with increase in filler loading from 5 to 20% in the PP matrix. The decrease in Izod Impact strength and elongation with addition of SCB & GNSP filler to PP matrix follows the general trend of filler effects on polymer matrix. However, the main purpose of this work was to study the effect of SCB & GNSP waste on the mechanical properties of the PP Composites. The SCB and GNSP waste can be used as filler in the PP composites, which will reduce cost and give environmental benefits.

The Optimum Technological Parameters and Properties of LDPE/LLDPE/Nano-Mg(OH)2 Systems

2011 ◽  
Vol 239-242 ◽  
pp. 437-440 ◽  
Author(s):  
Yu Hua Guo ◽  
Jian Jun Guo ◽  
Zhen Huang ◽  
Li Jun Teng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Flame Retardant ◽  
Young’S Modulus ◽  
Magnesium Hydroxide ◽  
Rotational Speed ◽  
Technological Parameters ◽  
Technological Route ◽  
Pressure Changes

Nano-structured magnesium hydroxide (nano-MH) has been added into LDPE/LLDPE, the technological parameters, flame and mechanical properties, M.F.R. of LDPE/LLDPE/nano-MH samples have been examined. It is indicated two time extruder pelletization is a good technological route, which can make nano-MH disperse evenly in PE. The optimum rotational speed of screws changes from 37 to 42 rad/min, the die pressure changes from 35 to 61.5 bar. Nano-MH has good flame retardant and smoke suppressing properties. The samples added 60% nano-MH can reach UL94 FV-0 flame retardant rating. When nano-MH content is more than 40%, no smoke emits. With nano-MH content increases, the tensile strength, impact strength, elongation and M.F.R decreases, Young’s modulus increases.

Mechanical Characterization of Polypropylene Natural Fibre Composites

2011 ◽  
Vol 383-390 ◽  
pp. 2737-2740 ◽  
Author(s):  
Sd Jacob Muthu ◽  
Ratnam Paskaramoorthy
Keyword(s):  
Mechanical Properties ◽  
Mechanical Characterization ◽  
Fibre Surface ◽  
Alkaline Treatment ◽  
Natural Fibre ◽  
Fibre Composites ◽  
The Matrix ◽  
Pp Composites ◽  
Fibre Loading

Using polypropylene (PP) as matrix and kenaf mat as reinforcement, composite test samples were fabricated by compression molding. Thereafter, the effect of fibre loading and the alkaline fibre surface treatment on the mechanical properties were studied. The kenaf/PP composites were found to have better mechanical properties than the polymer matrix. As expected, the interfacial bonding between the matrix and the fibres improved considerably when the fibres were subjected to alkaline treatment.

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