The Universal Selection Source: Plastics & Elastomers


Stiffness

Stiffness is directly linked to the Flexural Modulus. Flexural Modulus of a tested specimen being bended between three points is measured by the ratio of the strain observed on the stress applied on it.

The International Standard unit of Flexural Modulus is the pascal (Pa or N/m2 or m-1.kg.s-2). The practical units used are megapascals (MPa or N/mm2) or gigapascals (GPa or kN/mm2). In the US customary units, it is expressed as pounds (force) per square inch (psi).

The higher the Flexural Modulus, the stiffer the material. The lower the Flexural Modulus, the more flexible it is.

Most commonly used standards to measure Flexural Modulus are ASTM D790 and ISO 178.

Name of the polymer Explicit name of the polymer Min Value(GPa) Max Value(GPa)
ABS Acrylonitrile-Butadiene Styrene 1.600 2.400
ABS FR Acrylonitrile-Butadiene Styrene flame retardant 2.000 4.000
ABS High Heat Acrylonitrile-Butadiene Styrene High Heat 2.000 3.000
ABS High Impact Acrylonitrile-Butadiene Styrene High Impact 1.000 2.500
ABS/PC Acrylonitrile-Butadiene Styrene/Polycarbonate 2.000 2.300
ABS/PC 20% GF Acrylonitrile-Butadiene Styrene/Polycarbonate 20% glass fiber 5.900 6.100
ABS/PC FR Acrylonitrile-Butadiene Styrene/Polycarbonate flame retardant 2.500 3.000
Amorphous TPI Blend, Ultra-high heat, Chemical Resistant (High Flow) Amorphous TPI Blend, Ultra-high heat, Chemical Resistant (High Flow) 3.000 3.000
Amorphous TPI, High Heat, High Flow, Lead-Free Solderable, 30% GF Amorphous TPI, High Heat, High Flow, Lead-Free Solderable, 30% GF 9.000 9.000
Amorphous TPI, High Heat, High Flow, Transparent, Lead-Free Solderable (High Flow) Amorphous TPI, High Heat, High Flow, Transparent, Lead-Free Solderable (High Flow) 0.120 0.120
Amorphous TPI, High Heat, High Flow, Transparent, Lead-Free Solderable (Standard Flow) Amorphous TPI, High Heat, High Flow, Transparent, Lead-Free Solderable (Standard Flow) 2.850 2.850
Amorphous TPI, Highest heat, Chemical Resistant, 260C UL RTI Amorphous TPI, Highest heat, Chemical Resistant, 260C UL RTI 3.600 3.600
Amorphous TPI, Moderate Heat, Transparent Amorphous TPI, Moderate Heat, Transparent 3.080 3.080
Amorphous TPI, Moderate Heat, Transparent (Food Contact Approved) Amorphous TPI, Moderate Heat, Transparent (Food Contact Approved) 3.080 3.080
Amorphous TPI, Moderate Heat, Transparent (Mold Release grade) Amorphous TPI, Moderate Heat, Transparent (Mold Release grade) 3.070 3.070
Amorphous TPI, Moderate Heat, Transparent (Powder form) Amorphous TPI, Moderate Heat, Transparent (Powder form) 3.080 3.080
ASA Acrylonitrile Styrene Acrylate 1.500 2.400
ASA/PC Acrylonitrile Styrene Acrylate/Polycarbonate 2.000 2.600
ASA/PC FR Acrylonitrile Styrene Acrylate/Polycarbonate flame retardant 2.500 2.500
ASA/PVC Acrylonitrile Styrene Acrylate/Polyvinyl Chloride 2.000 2.200
CA - Cellulose Acetate Cellulose Acetate 0.600 2.800
CAB - Cellulose Acetate Butyrate Cellulose Acetate Butyrate 0.600 2.100
COC Cyclic Olefin Copolymer 2.500 3.500
CP - Cellulose Proprionate Cellulose Proprionate 0.450 1.400
CPVC - Chlorinated Polyvinyl Chloride CPVC - Chlorinated Polyvinyl Chloride 2.500 3.200
ECTFE Ethylene Chlorotrifluoroethylene 1.700 1.700
ETFE Ethylene Tetrafluoroethylene 0.800 1.400
EVA Ethylene Vinyl Acetate 0.007 0.100
EVOH Ethylene Vinyl Alcohol 2.800 5.800
FEP Fluorinated Ethylene Propylene 0.300 0.700
HDPE - High Density Polyethylene HDPE - High Density Polyethylene 0.750 1.575
HIPS - High Impact Polystyrene HIPS - High Impact Polystyrene 1.500 3.000
HIPS FR V0 High Impact Polystyrene flame retardant V0 2.000 2.500
Ionomer (EMAC) Ionomer (Ethylene-Methyl Acrylate Copolymer) 0.030 0.500
LCP Liquid Crystal Polymer 10.000 19.000
LCP CF Liquid Crystal Polymer carbon fiber 31.000 37.000
LCP GF Liquid Crystal Polymer glass fiber 13.000 24.000
LCP MINERAL Liquid Crystal Polymer mineral 12.000 20.000
LDPE - Low Density Polyethylene LDPE - Low Density Polyethylene 0.245 0.335
LLDPE - Linear Low Density Polyethylene LLDPE - Linear Low Density Polyethylene 0.280 0.735
PA 11 30% Glass fiber reinforced Polyamide 11 30% Glass fiber reinforced 3.000 3.000
PA 11 conductive Polyamide 11 conductive 0.580 0.640
PA 11 flexible Polyamide 11 flexible 0.290 0.350
PA 11 rigid Polyamide 11 rigid 1.000 1.480
PA 12 conductive Polyamide 12 conductive 0.740
PA 12 fiber reinforced Polyamide 12 fiber reinforced 3.000 13.700
PA 12 flexible Polyamide 12 flexible 0.360 0.460
PA 12 glass filled Polyamide 12 glass filled 1.750 2.000
PA 12 rigid Polyamide 12 rigid 1.170 1.480
PA 46 Polyamide 46 1.000 3.200
PA 46 30% GF Polyamide 46 30% glass fiber 7.800 8.200
PA 6 Polyamide 6 0.800 2.000
PA 6-10 Polyamide 6-10 1.000 2.000
PA 66 Polyamide 6-6 0.800 3.000
PA 66 30% GF Polyamide 6-6 30% glass fiber 5.000 8.000
PA 66 30% mineral filled Polyamide 6-6 30% mineral filled 3.900 4.100
PA 66 IM 15-30% GF Polyamide 6-6 impact modified 15-30% glass fiber 3.000 7.000
PA 66 impact modified Polyamide 6-6 impact modified 0.800 1.200
PA semi-aromatic Polyamide semi-aromatic 1.800 2.110
PAI Polyamide-Imide 4.000 7.000
PAI 30% GF Polyamide-Imide 30% glass fiber 11.000 15.000
PAI low friction Polyamide-Imide low friction 5.000 7.000
PAN Polyacrylonitrile 3.100 3.800
PAR Polyarylate 2.000 2.300
PARA 30-60% GF Polyarylamide 30-60% glass fiber 11.000 21.000
PBT Polybutylene Terephthalate 2.000 4.000
PBT 30% GF Polybutylene Terephthalate 30% glass fiber 9.000 11.500
PC 20-40% GF Polycarbonate 20-40% glass fiber 6.000 10.000
PC 20-40% GF FR Polycarbonate 20-40% glass fiber flame retardant 7.000 8.000
PC high heat Polycarbonate high heat 2.200 2.500
PC/PBT Polycarbonate/Polybutylene Terephthalate blend 1.600 3.900
PC/PBT glass filled Polycarbonate/Polybutyleneterphtalate blend glass filled 2.800 6.900
PCL - Polycaprolactone Polycaprolactone 0.500 0.600
PCTFE Polymonochlorotrifluoroethylene 1.200 1.500
PE 30% GF Polyethylene 30% glass fiber 4.900 5.600
PEEK Polyetheretherketone 3.700 4.000
PEEK 30% CF Polyetheretherketone 30% carbon fiber 13.000 19.000
PEEK 30% GF Polyetheretherketone 30% glass fiber 9.000 10.000
PEI Polyetherimide 3.000 3.400
PEI 30% GF Polyetherimide 30% glass fiber 9.000 9.000
PEI mineral filled Polyetherimide mineral filled 5.000 7.000
PEKK– Low cristallinity grade Polyetherketoneketone– Low cristallinity grade 3.300 3.400
PESU Polyethersulfone 2.500 2.700
PESU 10-30% GF Polyethersulfone 10-30% glass fiber 3.800 8.400
PET Polyethylene Terephtalate 2.800 3.500
PET 30% GF Polyethylene Terephtalate 30% glass fiber 9.000 12.000
PET 30/35% GF Impact modified Polyethylene Terephtalate 30/35% glass fiber impact modified 7.000 9.000
PET G Polyethylene Terephtalate Glycol 2.200 2.200
PE-UHMW Polyethylene -Ultra High Molecular Weight 0.450 0.600
PFA Perfluoroalkoxy 0.700 0.800
PHB - Polyhydroxybutyrate Polyhydroxybutyrate 3.000 3.200
PI Polyimide 2.480 4.100
PLA-injection molding Polylactide-injection molding 3.800 3.800
PMMA Polymethylmethacrylate (Acrylic) 2.500 3.500
PMMA high heat Polymethylmethacrylate (Acrylic) high heat 2.500 4.300
PMMA Impact modified Polymethylmethacrylate (Acrylic) impact modified 1.500 3.500
PMP Polymethylpentene 0.800 1.500
PMP 30% GF Polymethylpentene 30% glass fiber 5.000 6.000
PMP mineral filled Polymethylpentene mineral filled 1.700 2.000
Polyamide 66 (Nylon 66)/Carbon Fiber, Long, 30 % Filler by Weight Polyamide 66 (Nylon 66)/Carbon Fiber, Long, 30 % Filler by Weight 18.000 18.000
Polyamide 66 (Nylon 66)/Carbon Fiber, Long, 40 % Filler by Weight Polyamide 66 (Nylon 66)/Carbon Fiber, Long, 40 % Filler by Weight 24.000 24.000
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 40 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 40 % Filler by Weight 11.500 11.500
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 40 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 40 % Filler by Weight 10.500 10.500
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 50 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 50 % Filler by Weight 0.300 0.300
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 50 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 50 % Filler by Weight 13.000 13.000
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 60 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 60 % Filler by Weight 17.000 17.000
Polyamide 66 (Nylon 66)/Glass Fiber, Long, 60 % Filler by Weight Polyamide 66 (Nylon 66)/Glass Fiber, Long, 60 % Filler by Weight 16.000 16.000
Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 30 % Filler by Weight Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 30 % Filler by Weight 5.500 5.500
Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 40 % Filler by Weight Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 40 % Filler by Weight 7.000 7.000
Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 40 % Filler by Weight Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 40 % Filler by Weight 7.500 7.500
Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 50 % Filler by Weight Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 50 % Filler by Weight 9.000 9.000
Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 50 % Filler by Weight Polypropylene Homopolymer (PP Homopolymer)/Glass Fiber, Long, 50 % Filler by Weight 9.000 9.000
POM Polyoxymethylene (acetal) 2.800 3.700
POM impact modified Polyoxymethylene (acetal) impact modified 1.400 2.300
POM low friction Polyoxymethylene (acetal) low friction 2.000 3.000
POM mineral filled Polyoxymethylene (acetal) mineral filled 4.000 5.500
PP 10-20% GF Polypropylene 10-20% glass fiber 2.500 3.500
PP 10-40% mineral filled Polypropylene 10-40% mineral filled 1.400 3.100
PP 10-40% TALC Polypropylene 10-40% talc 1.500 4.000
PP 30-40% GF Polypropylene 30-40% glass fiber 4.000 7.000
PP copo Polypropylene copolymer 1.000 1.400
PP homo Polypropylene homopolymer 1.200 1.600
PP impact modified Polypropylene impact modified 0.400 1.000
PPA Polyphthalamide 2.100 3.700
PPA – 30% mineral Polyphthalamide– 30% mineral 5.400 5.600
PPA – 33% glass fiber Polyphthalamide – 33% glass fiber 11.300 11.500
PPA – 33% glass fiber – high flow Polyphthalamide– 33% glass fiber – high flow 10.000 12.000
PPA – 45% glass fiber Polyphthalamide– 45% glass fiber 13.700 13.900
PPE Polyphenylene Ether 2.100 2.800
PPE 30% GF Polyphenylene Ether 30% glass fiber 7.000 9.000
PPE FR Polyphenylene Ether flame retardant 2.400 2.500
PPE impact modified Polyphenylene Ether impact modified 2.100 2.800
PPE mineral filled Polyphenylene Ether mineral filled 2.900 3.500
PPS Polyphenylene Sulfide 3.800 4.200
PPS 20-30% GF Polyphenylene Sulfide 20-30% glass fiber 6.000 12.000
PPS 40% GF Polyphenylene Sulfide 40% glass fiber 12.000 15.000
PPS conductive Polyphenylene Sulfide conductive 17.000 19.000
PPS GF & mineral Polyphenylene Sulfide glass fiber & mineral 10.000 17.000
PPSU Polyphenylene Sulfone 2.380 2.410
PS 30 % GF Polystyrene 30% glass fiber 10.000 10.000
PS crystal Polystyrene crystal 2.500 3.500
PS high heat Polystyrene high heat 3.000 3.500
PSU Polysulfone 2.700 3.000
PSU 30% GF Polysulfone 30% glass fiber 7.000 8.500
PSU mineral filled Polysulfone mineral filled 4.000 5.000
PTFE Polytetrafluoroethylene 0.400 0.800
PTFE 25% GF Polytetrafluoroethylene 25% glass fiber 1.400 1.700
PVC 20% GF Polyvinyl Chloride 20% glass fiber 4.500 7.000
PVC plasticized Polyvinyl Chloride plasticized 0.001 1.800
PVC plasticized filled Polyvinyl Chloride plasticized filled 0.001 1.000
PVC rigid Polyvinyl Chloride rigid 2.100 3.500
PVDC Polyvinylidene Chloride 0.350 0.600
PVDF Polyvinylidene Fluoride 1.500 2.000
SAN Styrene Acrylonitrile 3.500 4.200
SAN 20% GF Styrene Acrylonitrile 20% glass fiber 7.000 9.000
SMA Styrene Maleic Anhydride 2.300 3.300
SMA 20% GF Styrene Maleic Anhydride 20% glass fiber 5.000 6.000
SMA FR V0 Styrene Maleic Anhydride flame retardant V0 1.900 2.000
SMMA Styrene Methyl Methacrylate 2.000 3.200
SRP Polyphenylene (Self reinforced) 6.200 8.300
TPI-PEEK Blend, Ultra-high heat, Chemical Resistant, High Flow, 240C UL RTI TPI-PEEK Blend, Ultra-high heat, Chemical Resistant, High Flow, 240C UL RTI 3.600 3.600
XLPE - Crosslinked Polyethylene XLPE - Crosslinked Polyethylene 0.350 3.500

Disclaimer: all data and information obtained via the Polymer Selector including but not limited to material suitability, material properties, performances, characteristics and cost are given for information purpose only. Although the data and information contained in the Polymer Selector are believed to be accurate and correspond to the best of our knowledge, they are provided without implied warranty of any kind. Data and information contained in the Polymer Selector are intended for guidance in a polymer selection process and should not be considered as binding specifications. The determination of the suitability of this information for any particular use is solely the responsibility of the user. Before working with any material, users should contact material suppliers in order to receive specific, complete and detailed information about the material they are considering. Part of the data and information contained in the Polymer Selector are genericised based on commercial literature provided by polymer suppliers and other parts are coming from assessments of our experts.

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