relative radiation stability of medical polymers - e-beam services

Our Customers Make Great Products Relative Radiation Stability of Medical Polymers E-BEAM Services, Inc. Contract Electron Beam Processing 118 Melrich Road Cranbury, New Jersey 08512 P • 609-655-7460 F • 609-655-3052 2775 Henkle Drive Lebanon, Ohio 45036 P • 513-933-0031 F • 513-933-0542 P.O. Box 4531 Lafayette, Indiana 47903 P • 765-447-6755 F • 765-449-1085 www.ebeamservices.com Dose (kiloGray) at which elongation changes by 25% in ambient air 0 25 50 100 200 300 400 500 kGy Thermosets Polystyrenes Polyethylenes Polyesters High-performance engineering resins Polycarbonate Polyurethanes PVC High-performance fluoropolymers ABS Elastomers Acrylic (PMMA) Nylon (Polyamides) Cellulosics Polypropylene (radiation grades) Polymethylpentene FEP Natural polypropylene Acetals PTFE Physical properties of irradiated polymers are subject to variations due to: 1) Stress (residual and functional), 2) Section thickness, 3) Molecular weight distribution, 4) Morphology, 5) Moisture, 6) Environmental (oxygen temperature) and must be tested in the specific application under consideration. Relative radiation, stability of medical polymers, courtesy of Ageless Processing Technology (APT), Del Mar, California, USA. References • NASA/Jet propulsion Laboratories, “Effects of Radiation on Polymers and Elastomers”, 1968 • Skelm and Williams, “Ionizing Radiation Effect on Selected Biomedical Polymers • Klang, “Effect of Gamma Irradiation on Elastomeric Closures.” FDA 1992 • Ley, “The Effects of Irradiation on Packaging Materials, 1976 Within each family is a range of radiation stabilities, the “steps” are intended to show significant family variations.

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Our Customers Make Great Products

Relative Radiation Stability of Medical Polymers

E-BEAM Services, Inc.Contract Electron Beam Processing

118 Melrich RoadCranbury, New Jersey 08512P • 609-655-7460F • 609-655-3052

2775 Henkle DriveLebanon, Ohio 45036P • 513-933-0031F • 513-933-0542

www.ebeamservices.com

Dose (kiloGray) at which elongation changes by 25% in ambient air0 25 50 100 200 300 400 500 kGy

Thermosets

Polystyrenes

Polyethylenes

Polyesters

High-performanceengineering resins

Polycarbonate

Polyurethanes

PVC

High-performancefluoropolymers

ABS

Elastomers

Acrylic (PMMA)

Nylon (Polyamides)

Cellulosics

Polypropylene(radiation grades)

Polymethylpentene

FEP

Naturalpolypropylene

Acetals

PTFE

Physical properties of irradiated polymers are subject to variations due to: 1) Stress (residual and functional), 2) Section thickness, 3) Molecular weight distribution, 4) Morphology, 5) Moisture,6) Environmental (oxygen temperature) and must be tested in the specific application under consideration.

Relative radiation, stability of medical polymers, courtesy of Ageless Processing Technology (APT), Del Mar, California, USA.

References• NASA/JetpropulsionLaboratories,“EffectsofRadiation on Polymers and Elastomers”, 1968• SkelmandWilliams,“IonizingRadiationEffecton Selected Biomedical Polymers• Klang,“EffectofGammaIrradiationonElastomeric Closures.” FDA 1992• Ley,“TheEffectsofIrradiationonPackagingMaterials, 1976

Withineachfamilyisarangeof radiation stabilities, the “steps”areintendedtoshowsignificant family variations.

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