scholarly journals Synergistic influence of halogenated flame retardants and nanoclay on flame performance of high density polyethylene and wood flour composites

RSC Advances ◽  
2017 ◽  
Vol 7 (40) ◽  
pp. 24895-24902 ◽  
Author(s):  
Jinlong Zhang ◽  
Qinglin Wu ◽  
Guangyao Li ◽  
Mei-Chun Li ◽  
Xiuxuan Sun ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
High Density Polyethylene ◽  
Flame Retardants ◽  
Wood Flour ◽  
High Density ◽  
Twin Screw Extrusion ◽  
Screw Extrusion ◽  
Twin Screw ◽  
Processing Aids ◽  
Halogenated Flame Retardants

High density polyethylene and wood flour (HDPE/WF) composites containing three flame modifiers (FMs) (i.e., two fire retardants: 1,2-bis(pentabromophenyl) and ethylene bis(tetrabromophthalimide), and one nanoclay), maleic anhydride grafted polyethylene (MAPE) and other processing aids were prepared through twin-screw extrusion, and their properties were characterized.

Self-Extinguishing and Non-Drip Flame Retardant Polyamide 6 Nanocomposite: Mechanical, Thermal, and Combustion Behavior

2018 ◽  
Vol 1 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Hao Wu ◽  
Rogelio Ortiz ◽  
Renan De Azevedo Correa ◽  
Mourad Krifa ◽  
Joseph H. Koo
Keyword(s):  
Maleic Anhydride ◽  
Flame Retardant ◽  
Polymer Matrix ◽  
Flame Retardants ◽  
Polyamide 6 ◽  
Twin Screw Extrusion ◽  
Elongation At Break ◽  
Combustion Behavior ◽  
Screw Extrusion ◽  
Twin Screw

AbstractIncorporation of flame-retardant (FR) additives and nanoclay fillers into thermoplastic polymers effectively suppresses materials flammability and melt dripping behavior. However, it largely affects other properties, such as toughness and ductility. In order to recover the lost toughness and ductility of flame retardant polyamide 6, various loadings of maleic anhydride modified SEBS elastomer were added and processed by twin screw extrusion. TEM images showed exfoliated nanoclay platelets and reveals that the clay platelets well dispersed in the polymer matrix. By balancing the ratio of flame retardants, nanoclay and elastomers, formulation with elongation at break as high as 76% was achieved. Combining conventional intumescent FR and nanoclay, UL-94 V-0 rating and the LOI value as high as 32.2 were achieved. In conclusion, effective self-extinguishing and non-drip polyamide 6 nanocomposite formulations with significant improvement in toughness and ductility were achieved.

Basalt fibre-reinforced high density polyethylene composite development using the twin screw extrusion process

2020 ◽  
Vol 91 ◽  
pp. 106467
Author(s):  
Onuh Adole ◽  
Lorna Anguilano ◽  
Timothy Minton ◽  
James Campbell ◽  
Lavelle Sean ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Extrusion Process ◽  
High Density ◽  
Twin Screw Extrusion ◽  
Basalt Fibre ◽  
Polyethylene Composite ◽  
Screw Extrusion ◽  
Twin Screw

Preparation of Polypropylene Graft Maleic Anhydride (PP-g-MA) via Twin Screw Extrusion

2010 ◽  
Vol 93-94 ◽  
pp. 451-454 ◽  
Author(s):  
Rittirong Pruthtikul ◽  
Pitcha Liewchirakorn
Keyword(s):  
Maleic Anhydride ◽  
Polyamide 6 ◽  
Standard Test ◽  
Acid Number ◽  
Test Method ◽  
Reactive Blending ◽  
Twin Screw Extrusion ◽  
Screw Extrusion ◽  
Twin Screw ◽  
Izod Impact

Polypropylene (PP) samples grafted with Maleic Anhydride (MA) were prepared by reactive blending via co-rotating twin screw extrusion. The PP was functionalized in the presence of an optimized amount of precursor, Dicumyl Peroxide (DCP) and MA. The amounts of MA grafted on PP were checked by standard test method for acid number. Maleated PP as a compatibilizer with the highest acid number was added to PP/Polyamide 6 (PA6) and blended in the twin screw extrusion. It was found that the PP-g-MA enhanced tensile properties as well as the izod impact properties of notched samples of PP/PA6/PP-g-MA blends compared to neat polypropylene. The scanning electron microscope confirmed the good adhesion of PA6 on PP matrix.

Fluorescence quenching of fluoranthene by maleic anhydride in solution and during nonreactive and reactive twin-screw extrusion

2012 ◽  
Vol 53 (2) ◽  
pp. 295-300
Author(s):  
Amine Methenni ◽  
Frej Mighri ◽  
Saïd Elkoun ◽  
Haixia Fang ◽  
Philippe Cassagnau
Keyword(s):  
Maleic Anhydride ◽  
Fluorescence Quenching ◽  
Twin Screw Extrusion ◽  
Screw Extrusion ◽  
Twin Screw

scholarly journals Influence of Lignin and Polymeric Diphenylmethane Diisocyante Addition on the Properties of Poly(butylene succinate)/Wood Flour Composite

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1161 ◽  
Author(s):  
Chan-Woo Park ◽  
Won-Jae Youe ◽  
Song-Yi Han ◽  
Ji-Soo Park ◽  
Eun-Ah Lee ◽  
...  
Keyword(s):  
Wood Flour ◽  
Crystallization Rate ◽  
Melt Flow Index ◽  
Kraft Lignin ◽  
Flow Index ◽  
Twin Screw Extrusion ◽  
Butylene Succinate ◽  
Screw Extrusion ◽  
Twin Screw ◽  
Higher Temperature

Poly(butylene succinate) (PBS)/wood flour (WF) composites with different WF content were prepared by twin-screw extrusion at 160 °C. With increasing WF content, the tensile strength of the PBS/WF composite without polymeric diphenylmethane diisocyante (pMDI) decreased, while that of the composite with pMDI increased. The addition of kraft lignin (KL) deteriorated the tensile properties of the composites both with and without pMDI. The melt flow index (MFI) decreased with increasing WF content, but increased with increasing KL content. The addition of pMDI caused an increase in the melt viscosity of the PBS/WF and PBS/WF/KL composites, resulting in a decrease in the MFI. The composites had lower thermal stability than neat PBS. The exotherms of the PBS/WF (50/50) composite appeared at a higher temperature than that of the neat PBS, but the PBS/WF/KL (50/50/20) composites had similar exotherms as the neat PBS. The addition of KL caused a decrease in the crystallization rate of PBS.

Mechanical Properties of Polypropylene Based Composites Reinforced with B4C

2013 ◽  
Vol 685 ◽  
pp. 19-23 ◽  
Author(s):  
Ali Sinan Dike ◽  
Harun Mindivan
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Yield Strength ◽  
Injection Molding ◽  
Scratch Resistance ◽  
Twin Screw Extrusion ◽  
Elongation At Break ◽  
Screw Extrusion ◽  
Twin Screw

The present work aims to compare the mechanical properties of Polypropylene (PP) based composites reinforced with B4C. Maleic Anhydride Modified Polypropylene (MAPP) was added to improve the B4C-matrix interphase. Processing has been carried out by twin-screw extrusion and injection molding. By adding the B4C particles to the PP and PP+MAPP matrix, the yield strength, shore D hardness, microhardness and relative scratch resistance increased gradually, but PP+MAPP/B4C composites showed better overall mechanical properties than the PP/B4C composites. However, elongation at break values occurred for all composites dropped with the B4C content, and PP+MAPP/B4C composites exhibited lower elongations at break than PP/B4C composites.

scholarly journals MOISTURE ABSORPTION BEHAVIOR OF MALEIC ANHYDRIDE GRAFTED POLYETHYLENE MODIFIED ETHYLENE VINYL ACETATE COPOLYMER / HIGH DENSITY POLYETHYLENE NANOCOMPOSITES

2014 ◽  
pp. 39-43
Author(s):  
ATUL RAJAN ◽  
PRADEEP UPADHYAYA ◽  
VIJAI KUMAR ◽  
NAVIN CHAND
Keyword(s):  
Maleic Anhydride ◽  
Vinyl Acetate ◽  
High Density Polyethylene ◽  
Moisture Absorption ◽  
Ethylene Vinyl Acetate ◽  
High Density ◽  
Twin Screw ◽  
Blend Nanocomposites ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

The compatibilized poly ethylene vinyl acetate copolymer (EVA)/high density polyethylene (HDPE) /organomodified montmorillonite (OMMT) blend nanocomposites were prepared in a co-rotating twin-screw extruder followed by injection molding. Montmorillonite clay was modified by octadecylamine and aminopropyltriethoxysilane to make it organophilic. Maleic anhydride grafted high-density polyethylene was used as a Compatibilizer. Nanoclay was added in different proportions to the selected EVA/HDPE blend composition. The concentration of nanoclay was varied from1 to 5 phr in the polymer blend. The resulting nanocomposites were evaluated in terms of their water absorption behavior. Moisture absorption behavior of compatibilized blends is lower than their corresponding blend. On adding the nanoclay the moisture absorption behavior of blend nanocomposites changed at 4 phr nanoclay loading.

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