Enhancing Flame Retardancy, Thermal Stability, Physical and Mechanical Properties of Polyethylene Foam with Polyphosphate Modified Expandable Graphite and Ammonium Polyphosphate
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M.-F. Ma
Abstract
The method of preparing polyolefin foam with good flame retardancy, thermal stability, and physical and mechanical properties was investigated. Foaming condition of linear low density polyethylene (LLDPE) was investigated with triphenyl phosphate (TPP) as plasticizer, NaHCO3 as foaming agent. The influence of modified expandable graphite (EGP) and ammonium polyphosphate (II) on foam density, compression strength, combustion characteristics and thermal stability was explored. Results verified that EGP presented better dilatability and flame retardancy than the normal expandable graphite. Addition of EGp improved the limiting oxygen index (LOI) of 15NaHCO3/100 LLDPETPP/30EGp foam from 18.8% to 24.6%. Furthermore, the combination of EGp and ammonium polyphosphate (II) (APP) at the mass ratio of 2:1 improved the LOI of 15NaHCO3/100 LLDPETPP/20EGp/10APP sample to 27.9%, and the vertical burning UL-94 level reached V-0, indicating that this material was flame retardant. Although these additives made 15NaHCO3/100 LLDPETPP/20EGp/10APP composite exhibit a high density of 142.5 kg m−3, which was increased by 12.3 wt% relative to the 15NaHCO3/100 LLDPETPP foam, it could improve the compressive strength to 0.4747 MPa, which was about 2.7 times that of the matrix. The thermal stability of the material was also enhanced.
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© 2019, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Flow-Fiber Coupled Viscosity in Injection Molding Simulations of Short Fiber Reinforced Thermoplastics
- Effects of Cooling Ways on the Structure of Polypropylene Hollow Fiber Membranes Prepared by Stretching
- Fill Factor Effects in Highly-Viscous Non-Isothermal Rubber Mixing Simulations
- Morphology and Isothermal Crystallization Kinetics of Polypropylene/Poly(ethylene-co-vinyl alcohol) Blends
- Mechanical and Thermal Properties of Teak Wood Flour/Starch Filled High Density Polyethylene Composites
- Three-Dimensional, Non-Isothermal Simulations of the Effect of Speed Ratio in Partially-Filled Rubber Mixing
- Edge Effect in Hot Embossing and its Influence on Global Pattern Replication of Polymer-Based Microneedles
- Enhancing Flame Retardancy, Thermal Stability, Physical and Mechanical Properties of Polyethylene Foam with Polyphosphate Modified Expandable Graphite and Ammonium Polyphosphate
- Processing LDS-Circuit Boards by Selective Laser Sintering
- Structural and Optical Characteristics of Laser Irradiated CdSe/PVA Nanocomposites
- The Effect of Ultraviolet Ageing on the Flame Retardancy, Thermal Stability and Mechanical Properties of LGFPP/IFR
- Preparation and Characterization of a Biocomposite Based on Cork Microparticles in Poly(β-hydroxybutyrate)-co-Poly(β-hydroxyvalerate) Matrix
- Partially Filled Flow Simulation Using Meshfree Method for High Viscosity Fluid in Plastic Mixer
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Flow-Fiber Coupled Viscosity in Injection Molding Simulations of Short Fiber Reinforced Thermoplastics
- Effects of Cooling Ways on the Structure of Polypropylene Hollow Fiber Membranes Prepared by Stretching
- Fill Factor Effects in Highly-Viscous Non-Isothermal Rubber Mixing Simulations
- Morphology and Isothermal Crystallization Kinetics of Polypropylene/Poly(ethylene-co-vinyl alcohol) Blends
- Mechanical and Thermal Properties of Teak Wood Flour/Starch Filled High Density Polyethylene Composites
- Three-Dimensional, Non-Isothermal Simulations of the Effect of Speed Ratio in Partially-Filled Rubber Mixing
- Edge Effect in Hot Embossing and its Influence on Global Pattern Replication of Polymer-Based Microneedles
- Enhancing Flame Retardancy, Thermal Stability, Physical and Mechanical Properties of Polyethylene Foam with Polyphosphate Modified Expandable Graphite and Ammonium Polyphosphate
- Processing LDS-Circuit Boards by Selective Laser Sintering
- Structural and Optical Characteristics of Laser Irradiated CdSe/PVA Nanocomposites
- The Effect of Ultraviolet Ageing on the Flame Retardancy, Thermal Stability and Mechanical Properties of LGFPP/IFR
- Preparation and Characterization of a Biocomposite Based on Cork Microparticles in Poly(β-hydroxybutyrate)-co-Poly(β-hydroxyvalerate) Matrix
- Partially Filled Flow Simulation Using Meshfree Method for High Viscosity Fluid in Plastic Mixer
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts